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HomeMy WebLinkAboutCOUNCIL - AGENDA ITEM - 01/11/2011 - CACHE LA POUDRE RIVER FLOODPLAIN REGULATIONS DATE: January 11, 2011
STAFF: Jon Haukaas,
WORK SESSION ITEM
Ken Sampley, Josh Birks FORT COLLINS CITY COUNCIL
Pre-taped staff presentation: available
at fcgov.com/clerk/agendas.php
SUBJECT FOR DISCUSSION
Cache La Poudre River Floodplain Regulations.
EXECUTIVE SUMMARY
A component of the Stormwater program review requested by City Council in October 2009
included a review of the level of regulation protecting life and property for areas within the Poudre
River floodplain.
Initial analysis of potential revisions and preliminary Stormwater staff recommendations were
presented at the August 24, 2010 City Council Work Session. Three options were presented for
Council review and direction as outlined below:
Option#1: The Poudre River floodplain regulations are revised to adopt a 0.1 foot rise
floodway; or
Option 42: The Poudre River floodplain regulations be revised to not allow any structures in the
100-year floodplain; or
Option#3: No change to the Poudre River floodplain regulations (null alternative).
Staff was directed to pursue an extensive public outreach program to solicit and obtain input and
feedback on the potential revisions. Council also requested that staff address the purpose and need
to change the floodplain regulations, provide additional information on the level of impact to
properties, determine the economic impacts associated with reduced development potential, better
define life safety considerations and potential flood damage,and investigate other options including
"No Adverse Impact."
In accordance with Council direction to investigate other alternative approaches, an additional
option was identified for further consideration and is listed below:
Option#4: No Adverse Impact.
GENERAL DIRECTION SOUGHT AND SPECIFIC QUESTIONS TO BE ANSWERED
Given the importance of the Poudre River to the City of Fort Collins and its citizens:
1. Does Council feel that sufficient outreach and analysis has been provided to make an
informed decision regarding the Poudre River Floodplain Regulations?
2. Does Council have comments and/or direction with regard to the specific options identified?
January 11, 2011 Page 2
BACKGROUND / DISCUSSION
The City is charged with the protection of life safety and mitigation of flood damage impacts to
property. To that end, the goal of the Utilities Stormwater staff is to reduce the overall flood risk
in the Poudre River basin. Further development in the floodplain results in increased risk to existing
properties by increasing the flood elevation, changing the flow patterns and increasing velocities. '
By allowing more development in areas prone to flooding,additional people and property,including
emergency response personnel, are at risk. The only floodplain regulations being reviewed are for
the Poudre River because:
• the Poudre River is the largest watershed in the city, and has the potential to generate the
highest flows, deepest depths and highest velocities during a flood event.
• the Poudre Basin is different from other basins because it cannot be modified with
engineering solutions.
• the best way to prevent future flood losses is through appropriate floodplain regulation
consistent with industry best practices and community values.
Elements and Purpose of Floodplain Administration
The elements of floodplain administration consist of:
• protection of life safety and property from the effects of flooding through proactive
regulation, emergency response and long-term planning
• encouraging sustainable construction practices that reduce burdens on future generations
• reducing clean-up costs created by flood-damaged structures and property,minimizing the
volume of landfill wastes
• reduction of communitywide disruptions of commerce, livelihood and services
Life safety
The overriding purpose of floodplain regulations is to protect life safety. Having additional people
working and acquiring services in the floodplain results in the possible need for evacuation and
rescue. This not only puts the employees and customers at risk, but also the emergency response
personnel performing rescue operations. Even if new structures are built"flood-safe",this does not
solve the issue of evacuation during a flood event due to limitations on access to the building.
Local, state, and federal officials are faced with rescue operations at great personal risk. The
elevation and flows of the Poudre River may stay at an elevated level for days or weeks, requiring
longer term relocation.
Protect Property
Protection of property is an issue not only for the new properties proposed to be built, but for
existing properties. By allowing fill and obstructions in the floodplain, the water is being diverted
in different directions. Properties not currently in the floodplain may be damaged by water that is
redirected at their properties and may eventually be mapped into the floodplain. Additional fill and
structures also cause increases in the flood elevations and flood velocities, which results in
additional damages to existing properties. Debris generated by structures being damaged or
floatable materials being swept off-site can cause increased damage to downstream properties and
January 11, 2011 Page 3
often cause debris blockages at bridges. When bridges are blocked, the water cannot flow through
the bridge and, thus backs-up, increasing the flood level, or the water finds a new flow path and
floods properties that may not even be in the floodplain.
City Code contains three distinct floodplain designations: the FEMA-mapped Poudre River
floodplain, the four FEMA-mapped basin floodplains (Spring Creek, Dry Creek, Cooper Slough,
and Boxelder Creek), and the remaining City-mapped floodplains.
Poudre River Basin Characteristics and Flood History
The Poudre River floodplain is separated because of its unique characteristics. The Poudre River
basin has the largest drainage area (1,537 square miles upstream of the confluence with Boxelder
Creek)and highest peak flows in a 100-year storm(13,300 cfs upstream of its confluence with Dry
Creek)of any of the basins in Fort Collins. The velocities during the 100-year flood are calculated
to reach over 13 feet per second in town, which can result in significant life safety issues and
property damages. The River receives runoff not only for the areas upstream of the City, but also
from the city's local drainage basins(West Vine,Old Town,Dry Creek, Spring Creek,and Boxelder
Creek). The travel time of the flood peak from the mouth of the Canyon to the city limits is
estimated to be 2 hours of less, resulting in very little time for warnings or evacuations.
Major floods have occurred in 1864, 1891, and 1904. More recent smaller floods have occurred in
1983 and 1999. Attachment 1 provides additional historical information on Poudre River flooding.
Snowmelt, rain on snow, heavy rains resulting in flash flooding, or dam breaks can all cause
flooding on the Poudre River. With snowmelt and rain on snow, the water may stay high for days
or weeks at a time. Flash flooding may result with very little warning time. When water hits an
urban area and has nowhere to go,it finds the easiest path through or around buildings,over bridges
jammed with debris, etc. An increase in obstructions due to new development (fill and buildings)
creates higher flood elevations and velocities resulting in increased flooding of existing floodplain
properties, as well as those outside the 100-year floodplain.
Possible Structural Solutions to Mitigate Flood Damages
The Poudre River Master Plan investigated alternatives and determined the only practicable
construction project to effectively mitigate flooding was the Oxbow Levee. The Levee was
constructed in 2006 and provides flood protection to the Buckingham neighborhood. There are no
other feasible or cost effective construction projects or engineering solutions to effectively mitigate
flooding damage on the Poudre River. The other solutions considered involved additional
channelization of the River through widening or constructing additional levees. These were all
discarded early in the process due to estimated costs and environmental impact. As a result,the only
viable approach is to protect life safety and manage risk through floodplain regulation.
Right to Regulate
No outside agency is requiring the City to revise the regulations at this time. The current program
meets and, in many instances, exceeds the requirements of both the State Colorado Water
Conservation Board (CWCB) and Federal Emergency Management Agency (FEMA). FEMA
encourages state and local governments to implement higher standards. The City is not a categorical
industry leader in floodplain management in the State of Colorado. Attachment 2 provides a listing
January 11, 2011 Page 4
of selected floodplain regulations for both regional and national communities and states. The City
has the right to impose higher standards to improve the protection of life safety and property to the
level it believes achieves the appropriate balance of risk for the community.
Public Outreach and Feedback
At the August 24, 2010 Council Work Session, staff was directed to pursue an extensive public
outreach program to solicit and obtain input and feedback on the potential revisions to the Poudre
River Floodplain Regulations. Council also requested that staff address the purpose and need to
change the floodplain regulations, provide additional information on the level of impact to
properties,and investigate other options,including"No Adverse Impact." A summary of the Public
Outreach Program components is tabulated below:
• Specific Property Owner Letters
• Individual (One-on-one) Meetings
• Presentations to Boards and Commissions
• Presentations to City Departments
• Presentations to Business Associations and Groups
• Presentations to Other Government Agencies and Citizen Groups
• Poudre River Floodplain Regulations Open House
• Poudre River Floodplain Regulations Open House Presentation Boards at Aztlan Center
• Media/News Releases
• Website
Specific Property Owner Letters
A total of 232 letters identifying impacts of Options 1,2 and 3 on individual properties were mailed
to property owners in October 2010. A sample property owner letter packet is provided in
Attachment 3.
The table below summarizes the total impacted acreages.
Current Regulations Option 1 Option 2
Additional
Acres Acres Acres Total Acres Acres
in 100-Year in 0.5-foot in 0.1-foot in 0.1-foot in Flood
Floodplain Floodway Floodway Floodway Fringe
City Limits 380 203 42 245 178
Growth 860 283 69 354 576
Management Area
Total 1240 487 111 598 753
January 11, 2011 Page 5
The table below summarizes the potential impacts and was included with the specific property
letters.
Floodway Flood Fringe Flood Fringe
(Option 1 2 or 3 (Option 1 or 3 (Option 2
Build New Residential, Mixed-use Residential and Mixed- Residential,
Structures by and Non-Residential—not Use—not allowed. Mixed-use and
Elevating or Flood allowed. Non-Residential— Non-Residential
proofing allowed, must elevate —not allowed.
or flood proof
Additions to Existing Residential, Mixed-use Residential and Mixed- Residential,
Structures in Flood and Non-Residential—not Use—not allowed. Mixed-use and
Fringe allowed. Non-Residential— Non-Residential
allowed, must elevate —not allowed.
or flood proof.
Redevelopment in Residential, Mixed-use Residential and Mixed- Residential,
Flood Fringe and Non-Residential—not use—allowed, must Mixed-use and
(rebuild but not allowed. elevate. Non-Residential
increase footprint) Non-Residential —not allowed.
—allowed, must elevate
or flood proof.
Remodel Existing Allowed - subject to Allowed - subject to Allowed -
Structures substantial improvement substantial subject to
requirements.* improvement substantial
requirements.* improvement
requirements.*
Non-structural Allowed. Must show no- Allowed. Allowed.
Development—fill, rise to the 100-year flood
parking lots, trails, level.
detention ponds,
recreational
amenities
Critical Facilities Not allowed. Not allowed. Not allowed.
*Substantial improvement occurs when the cost of improvement, or amount of damage, equals or
exceeds .50% of the market value of the structure prior to the improvement or damage. For the
Poudre Rive, the cost is cumulative over the life ofthe structure. Ifsubstantial improvement occurs,
the structure must be elevated or floodproofed.
Presentations to Boards and Commissions
Presentations and interactive discussions of the proposed options were completed as shown below:
Boards and Commissions Date
Land Conservation & Stewardship August 11, 2010
Planning and Zoning August 13, 2010
Water Board August 19, 2010
Natural Resources Advisory Board October 20, 2010
Natural Resources Advisory Board December 15, 2010
January 11, 2011 Page 6
Presentations to City Departments
Presentations and interactive discussions of the proposed options were completed as shown below:
City Departments
Advance Planning July 28, 2010
Natural Resources August 2, 2010
Natural Areas Senior Staff October 20, 2010
Natural Resources Senior Staff November 4, 2010
Planning and Economic Development November 18, 2010
Presentations to Business Associations and Groups
Presentations and interactive discussions of the proposed options were completed as shown below:
Business Groups
North Fort Collins Business Association August 25, 2010
Downtown Development Authority September 9, 2010
Commercial Brokers September 16, 2010
Ft Collins Area Chamber of Commerce September 17, 2010
North Fort Collins Business Association September 22, 2010
North College Citizen Advisory Group October 7, 2010
South Fort Collins Business Association December 8, 2010
Presentations to Other Government Agencies and Citizen Groups
Other Government Agencies
Larimer Board of Co. Commissioners October 25, 2010
Other Groups
Save the Poudre August 11, 2010
Wildlands Restoration Volunteers November 2, 2010
Open House November 18, 2010
Poudre River Floodplain Regulations Open House
On November 18,2010, staff facilitated an open house for the public and interested parties to obtain
information on the potential floodplain regulation revisions and provide input and feedback.
Approximately 120 people attended the open house. Fort Collins Stormwater and Floodplain
Administration staff used presentation boards to convey key considerations associated with the
potential revisions. FEMA sponsored a presentation by Ed Thomas (National Hazard Mitigation
Association ), a nationally-recognized expert and frequent lecturer on Emergency Management
issues. Mr. Thomas spoke on government's role in life safety, development roles and
responsibilities, creating"win-win" solutions,decision making based on sustainable practices, and
the economic case for prudent development. Attachment 4 includes the presentation boards that
were utilized at the open house. Attachment 5 provides a summary of the comments received by
topic frequency and the individual comments and input that was received at the open house.
January 11, 2011 Page 7
Additional Public Comments and Feedback
Additional public comments were gathered based on individual meetings and discussions, emails,
handwritten comments, formal letters and other communications. Attachment 6 provides a listing
of the detailed comments received and a list of specific meetings held with interested parties.
DISCUSSION OF OPTIONS
Detailed information on Options 1, 2 and 3 was provided at the August 24, 2010 Council Work
Session and the staff summary is included as Attachment 7. A brief summary of these options is
provided below along with more detailed information on Options 4. It is important to emphasize
that none of the options prohibit revisions to the Poudre River Floodway and Floodplain by
obtaining an approved FEMA Letter of Map Revision (LOMR). A LOMR allows the floodplain
map to be revised based on physical changes to the River and accompanying engineering analyses.
If a LOMR process is not pursued -- Options 1, 2 and 3 provide the regulatory framework for
development and redevelopment. It is also important to note that City Code outlines provisions for
properties to request variances to the floodplain regulations in accordance with specific criteria.
Option #1 —Adopt a 0.1 foot Rise Floodway
This option returns the Poudre River Floodplain Regulations to a 0.1 foot rise floodway.
Attachment 8 is a map of the Poudre River showing the floodplain and an approximation of the 0.1
foot floodway based on data from 2000. This boundary was initially adopted by City ordinance in
2000. In 2007, it was revised to a 0.5 foot rise standard for continuity with Larimer County
standards.
Benefits of returning the regulations to a 0.1 foot rise floodway include:
• Reduced threats to life safety and property damage for existing and future properties
(Primary)
• Limits local funding demands for post-flood clean up for existing and future properties
(Primary)
• Reduced business related losses--i.e.,loss of service/sales,flood disruption,rental income,
capital income, costs for temporary relocation (Primary)
• Reduced demands on emergency response personnel (Primary)
• Preservation of River functions (Secondary)
• Protection of riparian health and habitat (Secondary).
Detriments of returning the regulations to a 0.1 foot rise floodway include:
• Restricts/limits structural development in the expanded floodway
• Expansion of existing structures within the expanded floodway is more difficult
• Discontinuity of regulations at jurisdictional boundaries with Larimer County
• Costs to calculate and then re-map the floodway.
January 11, 2011 Page 8
Option #2 —Not Allow Structures in the 100-year Floodplain
Prohibiting structures from the entire 100-year floodplain would minimize the life safety and
property damage risks associated with flooding on the Poudre River. Restriction of structures means
less people living and working in areas of the highest risk. The definition of structures would follow
what currently exists in Chapter 10 of the City Code. This would not prohibit the construction of
bridges, trails, utilities, parking lots, detention and water quality ponds, parks and park amenities
such as gazebos, trail signs, etc.
Benefits of prohibiting new structural development in the 100-year floodplain include:
• Further reduced threats to life safety and property damage for existing and future properties
(Primary)
• Limits local funding demands for post-flood clean up for existing and future
properties(Primary)
• Minimizes business related losses -- i.e., loss of service/sales, flood disruption, rental
income, capital income, costs for temporary relocation (Primary)
• Further reduced demands on emergency response personnel (Primary)
• Expands the preservation of River functions (Secondary)
• Expands the protection of riparian health and habitat (Secondary).
Detriments of prohibiting new structural development in the 100-year floodplain include:
• Prohibits all structural development in the floodplain
• Expansion of existing structures within the expanded floodway is more difficult
• Discontinuity of regulations at jurisdictional boundaries with Larimer County
• Costs to calculate and then re-map the floodway.
Option #3—No Change to Existing Regulations (Null Alternative)
This option preserves the existing regulation which specifies a 0.5 foot rise floodway. It is less
restrictive than either Option 1 or Option 2.
Benefits of maintaining the existing 0.5 foot rise floodway include:
• No implementation costs or City Code revisions (Primary)
• Continuity of regulations at jurisdictional boundaries with Larimer County (Primary)
Detriments of maintaining the existing 0.5 foot rise floodway include:
• Allows new development in areas of flood risk
• New development creates additional obstructions in the floodplain and diverts flood waters
onto existing neighbors and potentially outside of the currently mapped floodplain
• Limits preservation of River functions
• Limits the protection of riparian health and habitat.
January 11, 2011 Page 9
Option #4—No Adverse Impact
No adverse impact(NAI)is a philosophical approach to managing land use and a national trend and
best practice in the floodplain management arena. While current regulations focus on limitations
to the property under development, NAI focuses on eliminating impacts to the surrounding
properties. The goal of NAI is to prevent the worsening of flooding on existing homes, businesses
and properties through responsible floodplain development. The basic NAI principle is that one
Property owner can not adversely impact the rights of other property owners. NAI would promote
new development and redevelopment on the Poudre River that:
• Fits into the surrounding infrastructure and environment
• Is equitable to surrounding property owners
• Is economically and environmentally sustainable.
It is important to note that NAI does not take the place of or circumvent floodplain regulations. NAI
goes a step further in addressing social liabilities that exist within the current floodplain regulations.
Current practices in floodplain management allow new development or redevelopment to increase
flood hazards on adjacent and impacted properties, including existing homes and businesses. The
current Poudre River floodplain regulations allow property owners to create obstructions to flood
flow. These obstructions redirect floodwaters onto existing neighbors and can place properties
within the floodplain that previously were not in the floodplain.
An NAI strategy will move Fort Collins away from a development standards approach to managing
hazards along the Poudre River, and shift the community closer to a"good neighbor" approach to
protecting existing people, private and community assets, and infrastructure. Fort Collins'
floodplain program already incorporates many of the tools of NAI through Chapter 10 of the City
Code. The strategic implementation of these tools recognizes the conventional approach to
controlling natural systems through human intervention is historically expensive, and tends to
provide little deference to ecological systems and their value along the Poudre River corridor.
Implementation of NAI would require that new development and/or redevelopment evaluate all
impacts and demonstrate, through engineering analyses certified by a Professional Engineer and
Certified Floodplain Manager:
• No increase in base flood elevation (BFE)
• No life safety or property damage potential for the new development and/or redevelopment
during the 100-year flood
• No adverse impacts on adjacent, upstream and downstream properties including:
o No increase in flood velocities
o No increase in erosion or sedimentation
o No increase in flood damage.
Benefits of a No Adverse Impact approach include:
• Reduced threats to life safety and property damage (Primary)
• Protection of existing properties, residents and businesses from additional flood hazards
created from new development (Primary)
• Reductions to local funding demands for post-flood clean up (Primary)
January 11, 2011 Page 10
• Minimizes business related losses,i.e.,loss of service/sales,flood disruption,rental income,
capital income, costs for temporary relocation (Primary)
• Reduced demands on emergency response personnel (Primary)
• Accommodates the preservation of River functions (Secondary)
• Accommodates the protection of riparian health and habitat (Secondary).
Detriments of a No Adverse Impact approach include:
• Approach is results based versus prescriptive regulations — less certainty in identifying
development and/or redevelopment opportunities until initial engineering analyses are
completed
• May reduce or limit potential development compared to that allowed with Options 1, 2 and
3.
The Poudre River is specifically noted in Plan Fort Collins and other City planning documents as
a vital asset to the City. There are competing community values associated with the Poudre River
that include protection of life safety, reduction of property damage, economic considerations
associated with new development and/or redevelopment of property within and adjacent to the
Poudre River floodplain, and protection of Poudre River functions, including riparian habitat and
biodiversity. Implementation of the approach identified in Option 4 would include extensive
coordination between City staff from multiple departments. Option 4 is consistent with the City's
Development Review Process and provides an approach to appropriately balance community values.
ECONOMIC AND FLOOD DAMAGE ANALYSES
In order to assist in the evaluation of the options under consideration and in response to Council's
request, the City has contracted with two separate consultants to prepare independent analyses of
both the economic impact to future development and the flood damage impacts to existing and
future development. Four geographic areas were selected for analysis:
• Area I - A portion of the North College Urban Renewal Area(URA) north of downtown.
• Area 2 - The Link-N-Green Golf Course redevelopment parcel near Lincoln/Lemay
• Area 3 - An area east of Lemay Avenue and south of Mulberry Street
• Area 4 - A portion of WW Reynolds Office Park, Gateway Medical Clinic, and Neenan
Development offices north and south of East Prospect Avenue
ECONOMIC IMPACT ANALYSIS—Prepared by EPS
Methodology
EPS examined the County Assessor parcel data in four identified areas along the Poudre River. The
areas were identified by the Economic Health Office, based on the potential opportunity for
redevelopment they represent.. The parcels in each area were aggregated into subareas based on
contiguous ownership and surrounding land uses. Each subarea is composed of one or more parcels
which are likely to be assembled and developed together or independently with complementary uses.
The subareas form the basis for the analysis of(re)development potential estimated by EPS.
EPS estimated (re)development potential of each area based on current regulations (No Change)
including current subarea plans, zoning, land use regulations, and floodplain regulations. The
January 11, 2011 Page 11
estimated (re)development potential in each area is then compared to the proposed floodplain
regulations options presented to City Council in August, including:
• Option 1 — 1/10 foot Floodway Expansion, or
• Option 2 —No Structures in the 100-Year Floodplain.
The analysis encompassed by the four areas includes approximately 305 acres of land or 17 percent
of the total acres impacted by the Floodplain in the City(1,803.5 acres). Under existing regulations,
no development is allowed in the 1/2 Foot Floodway and limited development (residential is
excluded)is allowed in the Flood Fringe. The current regulations leave 240 acres of net developable
land, meaning 21 percent of the total does not allow for structures currently. An estimate of the
(re)development potential for this area was developed as the baseline to measure the potential
impact of Option 1 and 2.
The proposed change to the Floodway standard under Option 1 and Option 2 reduce net developable
land in the four areas. The impacts include (See Table 3 in Attachment 9 for details by area):
• Option 1 —Leaves approximately 215 acres of net developable land, meaning 29 percent of
the total would not allow for structures or expansion of existing structures.
• Option 2—Leaves approximately 114 acres of net developable land,meaning 63 percent of
the total area would not allow for structures or expansion of existing structures.
It is the change in net developable area from the baseline established under the No Change option
that forms the basis for the economic impact presented in the EPS report.
Key Assumptions and Limitations
• The assessment of future development potentials is a planning level estimate for future build
out over an extended timeframe of up to 50 years.
• It, therefore, represents the best use determination of future development over an extended
period of time based on existing regulations (subarea plans, zoning, land use code, and
floodplain regulations).
• The estimated development potential may or may not be realized due to multiple factors and
the actual time period could be shorter or longer.
• The figures are therefore, designed to estimate a maximum future impact based on current
economic conditions, which may change.
• EPS has not conducted any project specific market forecasts and is therefore, unable to
provide estimates of development by time period.
• Current market values are applied by land use category to estimate development values and
potential tax losses.
• No actual determination of value for identified development areas,ownerships,or individual
parcels is either offered or implied.
• The actual value of any parcels or sites cannot be determined without more extensive
appraisal work and will depend on multiple factors, including but not limited to:
o the size of the parcel, shape, access, visibility
0 the willingness to sell
January 11, 2011 Page 12
o the quality and viability of any existing uses, occupancy levels,and/or net operating
incomes
o larger economic and market conditions present at the time of sale.
• In limited cases,the extent of the floodway or floodplain regulatory change would make new
development or redevelopment unlikely. In these circumstances the existing land uses
would likely be maintained or if the property is vacant, would remain undeveloped.
• The lack of development potential does not imply that the property has no value. The
property owner has a number of potential scenarios to maximize value, including sale to an
adjacent property owner to achieve the combined potential of a larger site and/or floodplain
mitigation measures to reduce the area of floodway or floodplain impacts.
• All economic impacts (direct, indirect, and induced) reported represent gross potential
impacts, not "net new" impacts. If the development potential identified under each option
is not built in the four areas,a portion of this projection of private construction(office,retail,
residential, etc.) may likely occur elsewhere in the City and surrounding area(even outside
City limits) to meet regional demand.
Summary of Findings
The following findings come from the full report prepared by EPS and included as Attachment 9.
These findings provide an overall summary presenting the relative impact of the proposed floodplain
regulations (see Table below and Attachment 9 for details).
Option 1 - 1/10 foot Floodway Expansion
• Based on the change to net developable area the impact on development potential under this
option for the four analysis areas is estimated at 352,000 square feet.
• The change in development potential represents approximately $66.4 million in total
development value.
• The change in development potential represents approximately$576,000 in potential annual
tax revenue to the City ($144,000 in property tax and $432,000 in sales tax).
• One-time economic impacts to the construction industry from the change in development
potential is approximately $79.3 million or 665 jobs.
• Ongoing economic impacts to all industries from the change in commercial/retail and office
development potential is approximately $138.5 million annually or 830 jobs.
Option 2 —No Structures in the 100-Year Floodplain
• Based on the change to net developable area the impact on development potential under this
option for the four analysis areas is estimated at 1.4 million square feet.
• The change in development potential represents approximately $253.0 million in total
development value.
• The change in development potential represents approximately $2.5 million in potential
annual tax revenue to the City ($470,000 in property tax and $2.0 million in sales tax);
• One-time economic impacts to the construction industry from the change in development
potential is approximately $303.4 million or 2,540 jobs.
• On-going economic impacts to all industries from the change in commercial/retail and office
development potential is approximately $644.9 million annually or 3,760 jobs.
January 11, 2011 Page 13
Option 4—No Adverse Impact
The analysis by EPS did not include an estimate of the economic impacts from this proposed option.
However, the analysis does recognize the following points about this proposed option:
• The.proposed changes under Option 1 and Option 2 will affect individual parcels and
ownerships differently.
• Some parcels may have only minor portions affected by the floodway and/or floodplain
while others may have large portions of the parcel restricted from future development
opportunity.
• In some cases, the floodplain mitigation measures used in common practice may reduce or
even eliminate the impact to a particular parcel or ownership.
• The feasibility and costibenefit of these engineered solutions should be evaluated on a case
by case basis.
Summary of Economic Impact Analysis Results
Description No Change-0.5 Floodway Option 1-0.1 Floodway Option 2-100-year Floodplain
New New Diff.fmm No Change %Diff. New Diff.from No Change %Diff.
Development(Sq.Ft.) 2.795,098 2,443,024 (352,074) -13% 1,430,365 (1,364,733) -49%
Market Value $488,946,678 $422,557,646 ($66,389,032) -14% $235,465,863 ($253,480,815) -52%
Property Tax $749,369 $605,555 ($143,815) -19% $278,954 ($470,415) -63%
Sales Tax $2,637.132 2 205 344 431 788 -16% $643,910 ($1,993,222) -76%
Total Tax $3,386,501 $2,810,899 ($575,602) -17% $922.864 ($2,463,637) -73%
Employment Impacts(Jobs)
One-Time Impacts
Direct 3,279 2,834 -445 -14% 1,576 -1,704 -52%
Indirect 688 594 -93 -14% 331 -357 -52%
Induced 929 803 -126 -14% 446 -483 -52%
Total 4,896 4,231 -665 -14% 2,352 -2,544 -52%
Annual Ongoing Impacts
Direct 4,028 3,468 -560 -14% 1,501 -2,527 -63%
Indirect 823 719 -103 -13% 348 -475 -58%
Induced 1 172 1 003 -169 -14% 414 -758 -65%
Total 6,023 5,190 -833 -14% 2,263 -3,760 -62%
Economic Output Impacts
One-Time Impacts
Direct $391,157,342 $338.046,117 ($53,111,225) -14% $187,932,690 ($203,224,652) -52%
Indirect $82,052,685 $70,911,596 ($11,141,089) -14% $39.422,453 ($42,630,232) -52%
Induced $110,779.280 $95,737,703 ($15.041,577) 114% $53,224,229 ($57,555.050) -520).
Total $583,989,306 $504,695,416 ($79,293,891) -14% $280,579,372 ($303,409,934) -52%
Annual Ongoing Impacts
Direct $779,804,602 $688,158,658 ($91,645,944) -12% 353,382,901 (5426,421301) -55%
Indirect $195.675,433 $173.596,075 ($22,079,358) -11% 92,102,945 ($103,572,488) -53%
Induced $206.584.510 $181,792,106 ($24792405) -12% 91,697,143 ($114.887,368) -56%
Total $1,182,064,545 $1,043,546,839 ($138,517,706) -12% $537,182,989 ($644,881,557) -55%
Source: City of Fort Collins;Economic&Planning Systems
January 11, 2011 Page 14
Flood Damage Impact Analysis
AMEC Earth and Environmental (AMEC)prepared a report that estimates the economic and other
detrimental impacts from flooding on existing and proposed development in the identified four
geographic study areas along the Poudre River. FEMA's GIS-based natural hazard loss estimation
tool (HAZUS-MH)was used to perform flood loss estimations for existing development. HAZUS-
MH determines flood damage on a building-specific basis based on the value of the structure and
the estimated depth of water. The FEMA and US Army Corp of Engineers (USAGE) have
developed damage functions which relate the depth of water on a structure to the amount of damage
to the structure, as well as its contents. A similar approach was used by the City's Stonnwater
Utility to determine damages to existing structures when the Stormwater Master Plan was updated
in the early 2000s.
Each of the impacted buildings in the study areas was identified by address and structure type.
Structure values for each parcel were estimated using Larimer County property value data. Flood
depths at each structure were determined based on the computed water surface elevations for the 10-
year, 50-year and 100-year events. Future structures were assumed to be elevated or flood proofed
above the 100-year water surface elevation and therefore will not suffer significant structural
damage. However, indirect damages and costs will still be incurred. It is not possible to quantify
all of the future impacts to future structures in the floodplain; however, some of the impacts can be
estimated based on the estimate of the extent, type and location of future development. Flood
impacts to proposed development focused on flood disruption losses and development projections
combined with estimation based on accepted methods and values associated with both HAZUS-MH
and benefit cost analysis software products. Proposed development projected building occupancy
and square footage was obtained from the economic impact study consultant (EPS) to ensure
consistency in development assumptions. AMEC also provided a qualitative discussion of potential
impacts that are difficult to quantify that supplements the disruption cost calculations. The four
geographic study areas contain a total of 149 existing structures within the 100-year floodplain. The
existing structures are primarily commercial,however Study Areas 1 and 3 include some residential
development. More detailed information on the structures can be found in the AMEC report.
Key Assumptions
• The assessment of future development potential is based on information provided by EPS
and is a planning level estimate for future build out over an extended timeframe of up to 50
years.
• Existing damages are based on depths from FEMA Flood Insurance Study profiles.
• Existing structure values with assumed contents values (100% of structure value for
commercial, 50%of structure for residential). Included business interruption losses,debris
removal costs based on City data,flood disruption costs,rental income losses,capital income
losses and sales tax reductions.
• Existing damages did not include losses for floods greater than 100-year.
• Future damages assumed new or substantially-improved development will conform to local
FP regulations and limit/reduce losses. Per the report, "the study assumes no direct building
impacts from the 100 year flood to new development, though the possibility could exist due
to errors in mapping and/or debris modifying the flow and impacts of floodwaters. "
• Future damages include capital-related income losses of lost services and sales due to
restricted business access, capital-related income losses of net loss of waters, displacement
January 11, 2011 Page 15
costs for temporary relocation, displacement costs for business disruption, displacement
costs for rental income loss to building owners, debris removal costs.
• Future damages did not quantify or include damage to buildings, risk to employees, risk to
customers,casualties,emergency services time,resources,and risk to personnel,evacuation
and rescue costs, cleanup costs,dewatering costs,parking lot damage,landscaping damage,
vehicles (personal or commercial/fleet), equipment or materials stored outside and not
confined or anchored, utility damages (sewer, water), buildings with failed or no flood
proofing,contents,road repair,bridge repair,bike path repair,damages for floods exceeding
the 100-year discharge.
Geographic Study Area#1 (College and Vine) is most prone to losses from flooding due to being
the most developed of the four areas. The highest future damage is likely for Study Area#2 due to
potential for future development. Potential exposure of additional people to flood risks associated
with new development should not be underestimated, though specific impacts are difficult to
quantify. Losses associated with future floods on the Poudre to existing and future development will
be shared by the City, individuals, and businesses.
The results of the Flood Damage Impact Analysis prepared by AMEC are presented in Attachment
10. The table below estimates the number of both existing and additional employees working within
the 100-Year Floodplain using the maximum development assumptions from the EPS study:
Estimated Employees within 100-Year Floodplain
Assuming Maximum Development
Option 1 Option 2 Option 3
Area 1 19156 446 19270
Estimated Existing Employees* 324 324 324
Estimated Additional Employees** 832 122 946
Area 2 11776 1,211 2,041
Estimated Existing Employees* 147 147 147
Estimated Additional Employees** 1629 1064 1894
Area 3 1,150 692 1,332
Estimated Existing Employees* 377 377 377
Estimated Additional Employees** 773 315 955
Area 4 270 36 270
Estimated Existing Employees* 36 36 36
Estimated Additional Employees** 234 0 234
This estimate does not include emergency services workers
*Assuming 4 employees per 1,000 square foot
—**Assuming Maximum Development
January 11, 2011 Page 16
Sustainability—Social, Environmental and Economic Impacts
The floodplain management program is,at its core,a safety program. The focus of the work is how
best to mitigate risk, the hazards to life, and the risk to property that occurs as a result of flooding
events. The economic analysis compares the potential damage costs against the potential
development revenues. The social component is increased life safety provided by the elimination
of structures in the floodplain.
Given the characteristics of the Poudre River basin (drainage area, 100-year peak discharge and
velocities, types of flooding, flood history, lack of cost-effective structural improvements and
minimal warning time), options 1, 2 and 4 offer various regulatory alternatives to minimizing the
flood risk. Existing properties in the floodplain are already at risk and additional development will
only increase the life safety risk and property damages when a flood occurs. It is the responsibility
and duty of the City to proactively manage foreseeable risks to protect current and future citizens
from the costly physical, financial and emotional impacts of flooding.
ATTACHMENTS
1. Cache La Poudre River Flooding History
2. Selected National/State/Local Floodplain Regulations
3. Sample Property Owner Impact Letter Packet
4. November 18, 2010 Open House Presentation Boards
5. November 18,2010 Open House Individual Comments and Summary of Comments by topic
6. Additional Public Comments and Feedback
7. August 24, 2010 Council Work Session Summary
8. Poudre River Floodplain and Floodway Comparison Map
9. Economic Impact Analysis (EPS Inc.)
10. Flood Damage Impact Analysis (AMEC)
11. PowerPoint presentation
FouJre Kiver FlooJi ATTACHMENT 110 n
The location of the City of Fort
Creating rort 011 i n s HI sto r Collins is where it is today because of
flooding on the Poudre River. The first
Damage was military post, Camp Collins, was
extensive in the originally established near the present
Andersonville day town of LaPorte. It was destroyed
Pilo 'T , neighborhood in 1864 when the Poudre River
(Lema Avenue flooded. Cam Collins was relocated
,. - . - - - y p
looking north to higher ground near present day
toward Vine
Old Town in Fort Collins .
_ - U Drive) after the
r ,
' r • flood in 1904. There are several well-documented
large floods on the Poudre River
high water mark
r. around the turn of the century. A
flood in 1891 was due to a dam
break on Chambers Lake. The most
notable flood was in 1904 . This
On June 8, 2010, the storm was greater than a 100-year
Poudre River, as seen ' event and resulted in the death of
from Lemay Avenue Fort Collins resident Robert Strauss .
looking north, had flows The Buckingham, Alta Vista and
ofabout3, 400 cubic Andersonville neighborhoods were
feet per second (cfs). severely damaged by the 1904 flood.
Typical flow at this -
location is 100 cfs. Numerous floods have occurred on
the Poudre River over time . The chart
below shows the highest flows on the
Poudre River from 1864 to today.
The most recent flooding on the
Peak Discharges for the Cache la Poudre River Poudre River was relatively minor
( recorded gage record 1882 to present) and due to snowmelt in June 2010 .
200
2
600
0 In the spring of 1999 , minor flooding
25000
24000 3 :.' d �_ peak Discharge (CFS) also occurred, caused by rain on snow
23000 t 0 0 3 LL �, �100-year Discharge (13,300 cfs)
22000 ._ during a warm period in April. The
21000 "' `°
20 W " Y flood lasted only a few days, but
19000 00 - — �
17000 a a resulted in a great deal of bank erosion
016000 a E
rn 15000 £ L and threatened many properties .
t 14000
13000
0 12000
m 11000
10000 �= Although the Poudre River has not
a
9000 a e000 flooded often in recent years, we know
000
6000 from the past that large floods on the
5000
4000 Poudre River can happen . Only the
3000
2000
1000 future will tell how flooding on the
° Poudre River could change the history
v rn v rn v rn v m v rn v rn v m v rn v rn v m v rn v rn v rn v rn v rn v rn v m
m ro ro ro ro ro m m ro ro ro ro m m rn rn rn rn rn m rn rn rn rn rn rn rn rn rn rn rn rn o 0
Year ` ` ` ` ` ` ` ` ` of Fort Collins again . 1 of 1
ATTACHMENT2
Selected National, State, and Local Floodplain Regulations
Compared to Fort Collins by hydrologic relevance, CRS rating, or Regional Higher Floodplain Standards
Community Name Substantial CRS
+ Published Date Buffers or Corridor Highest Minimum Elevate / Floodproof Improvement Rating (or
State of Standards Floodway Rise Restrictions? Freeboard Level Additions? Threshold S.I. Time Period New Buildings in FW? Critical Facilities 0.2% ac Standards? N/A) Other Notes and Standards
Federal Emergency Yes, if prove no-nse through H+H, obtain
ALL STATES Management Agency 1 0 ft. None OFF See adjacent 50% P E certification, and elevate structure to No standards No Standards N/A
(FEMA, 2010) freeboard level_
State of Colorado Yes, if prove no-nse through H+H, obtain Statewide LOMR-F does not remove freeboard requirement.
Colorado Water Conservation 0 5 ft. None 10 ft. above BEE See adjacent 50% PE certification, and elevate structure to Must elevate or floodproof 2 0 Guidelines and recommendations 300 pts. All OFF changes of 0 3 ft or greater (up or down)
Board (CWCB, 2011) heeboard level_ ft. above BFE. only U M C_ esfd require a LOMR.
No life-safety or emergency LOMR-F does not remove any flootlplain
Land Use buffers and 2.0 ft. (Poudre River) above Cumulative for response structures in 500- 500-yr restriction of life-safety ordinance requirements. Any change to BEE,
Colorado Fort Collins (2010) 0.5 k. to No-Rise 0.5 k. to 2.0 ft 50% Poutlre, 1-year for all Non-residential ON w/ no-rise. yr. Same for 100-yr, with and emergency response crit. Class 4 floodway boundary, or flootlplain boundary
erosion buffers BEE other basins. addition of haz-mat facilities requires CLOMRILOMR before permits are
restrictions. issued by 10-45(2).
1 0 ft. above the encroached or Only for substantial
(2010) pa County (p No. All uses must have a low flood damage
Arizona (2010) 1 0 ft. Erasion buffer (State),alluvial fans natural FEE 10); 2 0 ft for improvements (see Highest 50% potential_ No Class 5
shallow flooding areas Freeboard Level)
May be delineated at staffs
1 0 ft., and Ta < 1 25x gem- Erosion buffer (State), and 0.1 ft_, and Tzs < 1 25x goo- choosing ff not already mapped. Cannot increase V100 more than 10% or 1 0 fps,
feature height, and T25< 15x geologic features feature height, and T25 < 15x Only for substantial No. Only uses that do not require fill, Haz. Mat, emergency Critical facilities must be outside cannot cause more than 0.1-ft. of rise with
Arizona Pima County (2010) improvements (see Highest 50% excavation, structures, or storage of response, hospitals/respite 02% a< FP, or elevate 1 Oft above Class 5 encroachment. Geologic features restrictions
the tleplh,w, and others (see including alluvial fans and the tlepth,w, and others (see Freeboard Level) equipment and materials care, public utilities. OFF or 0 2% a-c flood level (higher also apidy No storage offloatables or hazadous
last column) confinement (canyons) last column)
of two)_ Also need tlryland access materials in the SFHA.
and emergency response plan.
2 0 ft. above OFF, or 2 0 ft. Yes, if prove no-nse through H+H, obtain None yet, but see adjacent
No current standards, but new
Colorado Boulder (2010) 0 5 ft. None above flood depth for AO See adjacent 50% 1 year PE certifcation' and elevate structure to standards being considered for
zones heeboard level_ column. critical facilities by City Council.
100-yr flootlplain is considered unsuitable for
Colorado Centennial + Arapaho 0 5 ft. Non e 2 0 ft. above BEE 2 0 ft. 50% No Class 8 human habitation. No structures, fill, subs(.
County (2010) improvements, or detention allowed in the FP or
FW. No floatables or haz. Mal.
0 0 ft for the Roaring Fork No increases permitted on any properties by
River, and 0 5 fl_ from WSEL or No new structures within 1 0 ft. above OFF for lowest development activities in the FW_ All area within
Colorado Eagle County (2008) EGL for all others. Never closer 15 ft of the stream side of floor, OFF for adjacent fill and See adjacent No Class 8 the 100-yr FP is to be protected in it's natural
than 25 ft_ from edge of the the flood fringe crawlspaces. state. No grading or vegetation removal. No
natural channel storage of floatables orflammables. No gamage
or debris storage.
Buffer for all tlev. 25 fl.
Kentucky Louisville + ,iefferson Unknown from solid bl 5 min 1 0 ft. above BEE See adjacent 50% 10 years Unknown Permitted with treatment Class 5
County Louisville
streams on ]5 min.
USGS quad maps.
0.lft. to 1 0 ft., depending upon 1 0 ft. above BFE, or 2 0 ft. 50%, or 25% if Yes, if prove no-nse through H+H, obtain
Mecklenberg County Variance and CLOMR required for use in BIT or
North Carolina waterway. County basins standard is None above H A G. if no BIT See adjacent damaged twice in 10 See adjacent PE codification, and elevate structure to Class 6
(2000) 0 5 ft. for most basins. provided_ yrs fleeboartl level change in FW elev or width_
18 inches above BEE for new
Fill around structures in construction. Can build to the Yes, if show and county uses are safe for
the fringe must be at least FEE 1 yr before flood mitigation residents upstream and downstream. No
Nevada Clark County (200]) 1 0 ft. as high as the BIT within project is completed within 1 yr 15 ft. 50% Cumulative (?) new hazardous material buildings allowed Class 6
25 ft of structures of building peril and has been documented in a FEMA-
unless variance is approved
approved CLOMR.
Must prove no adverse impact to neighbors
with H+H, including rise over 0.5 ft or
10 ft. above BEE for SFHA, Not permitted in SFHA unless 10-ft freeboard for new and expansion of flootlplain boundary. If adverse
,
Nevada Douglas County (2010) 0 5 ft. Alluvial Mn standards antl 1 Oft above H A G. in See adjacent 50% 5 years Yes d prove no-rise through H+H, show no impact >0 5 ft rise discovered, must submit
no alternative exists and public substantially improved structures, Class 6
Shaded X Zones use, and issue a CLOMR. is notified measured above site H A G. CLOMR. Change in flootlplain boundary must
submit LOMR. NAI statement in Sec_ 20 50.160
as cumulative rise of 1 0 ft. No solid fencing in
SFHA_
New Mexico Las Cruces (effective 1 0 ft. None OFF See adjacent 50% Yes, 6 prove no-rise through H+H Class 6
sate unknown)
Erosion hazard boundary, 2 0 ft above FEE for Geologic hazards and erosion hazards must be
Utah St. George (2003) 1 0 ft. lateral migration' and residential, 10 ft. for non- See atljacenl 50% Ves, if prove no-rise through H+H Class 7 evaluatetl by a P.E- Must also check longterm
geologic hazard degradation and lateral migration/erosion All
considerations. residential analyses have a 100-year planning period
1 of 2
Selected National, State, and Local Floodplain Regulations
Compared to Fort Collins by hydrologic relevance, CRS rating, or Regional Higher Floodplain Standards
Community Name Substantial CRS
+ Published Date Buffers or Corridor Highest Minimum Elevate / Floodproof Improvement Rating (or
State of Standards Floodway Rise Restrictions? Freeboard Level Additions? Threshold S.I. Time Period New Buildings in Filly? Critical Facilities 0.2% ac Standards? N/A) Other Notes and Standards
3 FWs, regulated the same.
Defined by FEMA 1 o-ft. use. Channel migration zones 2 0 ft. above BEE for new No buildings or fill, with agricultural Must elevate 3 Oft above All fill in flood fringe must be shown to cause no
Washington Pierce County (2010) deep/fast-Flowing FW (3 ft_ deep - FW construction and substantial See adjacent 50% 5 years exemptions for regionally-significant OFF, or build on dry section of Class 3 use to 0 001 ft (one one-thousandth) by technical
or 3 fps, or combo), and channel improvement farming structures (no footprint expansions). parcel if available_ modeling.
migration risk
Wyoming Cheyenne (2010) Assumed 1 Oft None 1 0It above OFF, or match See adjacent 50% Yes, if prove no-rise through H+H Class
Zane AO/AH elevations.
Illinois State of Illinois (2008) 0.1 ft. None Yes - details undocumented
Indiana State of Indiana (2008) 0.1 ft. None 2 0 fi. above BEE See adjacent
If meet 25% cumulative Discouraged but not prohibited for res. Non Statewide Desire to update current real and carry 2008
State of Iowa (Dept. of Statewide 1 0 ft_ above 1% aci ition footprint, must res permitted w/ cumul_ no-rise_ Can fall See Max Damage Potential Elev or 0oodproof 1 Oft or higher 300 pts_ flooding momentum to rings update. Cedar Falls
Iowa Natural Resources) 1 0 ft. None ann chance storm, and max elevate 1 Oft min (only 51% Cumulative back on no dwellings in 100-yr FP w/o and Governors Office for max damage potentiate buildings U ML. right limits vertical fill on a lot to 3 0 ft , of lot
and %
(2010) damage 1 0 ft. above 500-yr applies to post-1965 dryland access if necessary. Must mitigate recommendations now filled, and 1 0 ft_ freeboard above and .
structures) any use
Michigan State of Michigan 0.1 ft. None 10 fi. above BEE See adjacent Yes - details undocumented
(2008)
State of Minnesota
Minnesota (2008) 0 5ft None 10 ft. above BEE See adjacent
No fill permitted in the floodway, and all earth fill
If failure or intenuption of and erosion protection must be certified by a P.E.
services from public utilities, No fill may be permitted that increases BEE on
State of Montana existing development. Residential fill above BEE
Erasion hydraulic
na based streets, and budges results in
Montana (effective date D5 ft. on hydraulic analysis_ 20 ft. above BEE See adjacent 50% No danger to public health or must extend 15 hazardous beyond building perimeter.
unknown) safety, must elevate or Solid or re offl waste disposal prohibited in
flootlproof FP_ Storage of Flammable, explosive, or buoyant
materials in FP only allowed if elevated or
floodproofed.
New Jersey State of New Jersey 0 2 ft Criteria in fire flooded area
(2008) for O @ T = 125 yes
If failure or interruption of No variances are permissible against the
services from public utilities, freeboard requirements_ Gayland access required
State of Wisconsin streets, and bridges results in for residential construction in Flood fringe. Fill for
Wisconsin (2004) No-Rise None 2 0 ft. above BEE See adjacent 50% Cumulative No danger to public health or For levee design requirements only freeboard purposes must extend 15 ft from
safety, must elevate or perimeter of buildings. Solid or hazardous waste
Floodproof disposal prohibited in FP.
Iowa max damage potential = flood damage potential of hosipitals + like institutions, data buildings of public value, buildings or complexes dangerous to the public, or fuel storage facilities, power installations for emergency use, prisons, or complexes of similar nature = elev. or FP l 0 ft or above.
2 Governors Office wanted WRCC to recommend flood damage reductions. Idea to look at 500-yr standard Legislation failed. 500-yr standard is a destination for the future. Cedar Falls adopted 10-ft above 500-yr standard, Iowa City looking at 500-yr. Ames = 3Oft, Chelsea adopted cumulative definition ofsubstantial damage (2-in-10yr, with 30 ftfreeboad) = community of287
people with 19 5% living under the poverty line in 2000 census.
2of2
ATTACHMENT 3
City of
Fort Collins Fo Box 580
Fort Collins, CO 80522
970,221 ,6700
970.221 .6619 — fax
970.224 .6003 — TDD
utilities@fcgov. com
fcgov. com/utilities
October 25 , 2010
Property Owner Name
Property Owner Address
Property Owner Address
Dear Property Owner/Tennant:
As you may know, the City of Fort Collins is reviewing the floodplain regulations for the Poudre River. If
current floodplain regulations change, non-residential property owners and tenants in the Poudre River 100-
year Floodplain will be directly affected by these changes . We are writing to notify you of the options being
considered and provide specific information on how your property may be regulated in the future .
Three regulation options are being considered:
Option # 1 : Adopt a 0 . 1 foot-rise floodway;
Option #2 : Prohibit all structures in the 100-year floodplain; or
Option #3 : No change to the regulations .
Attached you will find two maps that show your parcel and the floodplain mapping applicable to each
regulation option. In addition, we enclose an explanation of the proposed regulations and effect on your
property for each option. This analysis shows the land acreage impact of the proposed regulations .
Please refer to Frequently Asked Questions for more information on flooding history, flood risk and property
damage potential and other solutions previously considered. Also included is more information on the
purpose for the overall review of Stormwater guiding concepts and components of the Stormwater program.
A special open house is planned to discuss the floodplain regulation review.
November 18, 2010
4 — 7900 pm
Drake Center, 802 W. Drake Rd.
In addition, we would like to talk with you individually about the proposed regulations and the specific
implications for your property. If you are interested, please call (970) 221 -6682 for an appointment.
Visit our Web site, http ://www. fcgov. com/stormwater/ for information about the proposed floodplain
regulations, to comment on the proposed options or to learn about the Stormwater Management Program.
Sincerely,
n
iT
Jon Haukaas , P .E.
Water Engineering and Field Operations Manager Parcel # XXXXXXXXXX
1 of 10
Explanation of Proposed Poudre River Floodplain Regulation
Options and Effect on Your Property
This information provides more detail about the floodplain regulations, including floodplain maps,
proposed regulations, and specific information about your property. We suggest you review this packet by
looking at the maps along with the table below, and then review the acreage information as the third step .
Explanation of Proposed Regulations
The 100-year floodplain is comprised of two regulatory areas : the floodway and the flood fringe. The
floodway has greater depths of water, higher velocities, and the most restrictive regulations . The flood
fringe usually has shallower depths and lower velocity.
The table below summarizes changes the three options have on the primary floodplain regulations for the
floodway and flood fringe . Red text indicates where the regulations would become more restrictive, black
text indicates current regulations.
or Floodway Flood Fringe Flood Fringe
(Option 1 , 2, or 3 (Option 1 or 3 (Option 2
Build New Structures Residential, Mixed-use and Non- Residential and Mixed-Use — Residential, Mixed-use and
by Elevating or Residential — not allowed. not allowed. Non-Residential — not
Floodproofing Non-Residential — allowed, allowed.
must elevate or floodproof.
Additions to Existing Residential, Mixed-use and Non- Residential and Mixed-Use — Residential, Mixed-use and
Structures in Flood Residential — not allowed. not allowed. Non-Residential — not
Fringe Non-Residential — allowed, allowed.
must elevate or floodproof
Redevelopment in Residential, Mixed-use and Non- Residential and Mixed-use — Residential, Mixed-use and
Flood Fringe (rebuild Residential — not allowed. allowed, must elevate. Non-Residential — not
but not increase Non-Residential —allowed, allowed.
footprint) must elevate or floodproof.
Remodel Existing Allowed - subject to substantial Allowed - subject to Allowed - subject to
Structures improvement requirements. * substantial improvement substantial improvement
requirements. * requirements.
Non-structural Allowed. Must show no-rise to Allowed. Allowed.
Development— fill, the 100-year flood level.
parking lots, trails,
detention ponds,
recreational amenities
Critical Facilities Not allowed. Not allowed. Not allowed.
* Substantial Improvement occurs when the cost of improvement, or amount of damage, equals
or exceeds 50% of the market value of the structure prior to the improvement or damage. For
the Poudre River, the cost is cumulative over the life of the structure. If substantial improvement
occurs, the structure must be elevated or floodproofed.
Chapter 10 of City Code contains the official floodplain regulations for the City of Fort Collins . Another
useful tool for learning about floodplain regulations is the Poudre River Quick Guide that can be found at :
hqp ://www. fcgov. com/stonnwater/pdf/quick _ uigu de-poudre .pdf 220090330 .
- 1 -
Parcel # XXXXXXXXXX
2of10
Analysis of Your Property
Below is an explanation of each proposed option and the data specific to your parcel. This data is then
analyzed by comparing the mapping to the proposed regulations to describe the impact of each option on
your property.
Option #1 : Adopt a 0. 1 foot Rise Floodway
This option would expand the area being regulated as a floodway, the areas on your map shown in dark
blue and yellow.
Note : If Option # 1 is adopted, the 0 . 1 foot floodway delineation must be updated. As currently
shown, the 0 . 1 foot floodway should be considered an approximation since it is based on older
mapping and data (circa 2007) and contains inaccuracies resulting from recent City projects,
developments and map revisions that have taken place since 2007 . If you have 0 . 1 foot floodway
(yellow color) on your property, it is important that Fort Collins Utilities staff meet with you to
fully explain the floodplain mapping. Please call (970) 221 -6682 to set up a meeting.
For this option, your map shows :
Parcel Area in Acres : 15 . 1
Acres in Floodway (0 . 5 foot floodway + additional 0 . 1 foot floodway) 12 . 041
Acres in Flood Fringe 2 . 581
Total Acres in 100 -year Floodplain 14 . 622
This means :
0.478 acres of property are currently not mapped in the 100-year floodplain and residential,
mixed-use, and non-residential structures or non-structural development not restricted by
the floodplain regulations (other than prohibition of critical facilities if mapped in the 500-
year floodplain) .
2 . 581 acres of your property would be mapped in the flood fringe and available for development
of elevated or floodproofed non-residential structures and non-structural development,
subject to the floodplain regulations ; and
12 . 041 acres of your property would be mapped in the floodway and only available for non-
structural development, subject to the floodplain regulations .
- 2 -
Parcel # XXXXXXXXXX
3of10
Option #2 : Prohibit All Structures in the 100-Year Floodplain
This option would change the regulations for the flood fringe (see table on page 1 ) . The floodplain and
floodway mapping would not change .
For this option, your map shows :
Parcel Area in Acres : 15 . 1
Acres in 0 . 5 foot Floodway (current standard) 10 . 356
Acres in Flood Fringe 4 .266
Total Acres in 100-year Floodplain 14 . 622
This means :
0 .478 acres of property are currently not mapped in the 100-year floodplain and residential,
mixed-use, and non-residential structures and non-structural development are not restricted
by the floodplain regulations (other than prohibition of critical facilities if mapped in the
500-year floodplain) .
14. 622 acres of your property would be mapped in the floodway and flood fringe and would only
be available for non-structural development, subject to the floodplain regulations .
Option #3 : No Change to the Regulations
For this option, your map shows :
Parcel Area in Acres : 15 . 1
Acres in 0 . 5 foot Floodway (current standard) 10 . 356
Acres in Flood Fringe 4 .266
Total Acres in 100-year Floodplain 14 . 622
This means :
0 .478 acres of property are currently not mapped in the 100-year floodplain and residential,
mixed-use, and non-residential structures or non-structural development are not restricted
by the floodplain regulations (other than prohibition of critical facilities if mapped in the
500-year floodplain) .
4.266 acres of your property are currently mapped in the flood fringe and available for
development of elevated or floodproofed non-residential structures and non-structural
development, subject to the floodplain regulations ; and
10 . 356 acres of your property are mapped in the floodway and only available for non-structural
development, subject to the floodplain regulations.
- 3 -
Parcel # XXXXXXXXXX
4of10
Poudre River Floodplain Map - Proposed Regulations Information
a
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4305 E Harmony Rd
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Selected Parcel Boundary 0 50 100
High Flood Risk I I I I Regulation Option 1
- Current 0 . 5 foot Floodway Feet
Proposed approximate 0 . 1 foot Floodway - Floodway if All floodplain boundaries are approximate. This map only shows
Option 1 is adopted . the Poudre River floodplain and does not show floodplains from
Flood Fringe basins other than the Poudre River.
There is at least a 1 % annual chance these areas will be flooded . Property Address
Moderate Flood Risk Parcel Number xxxxxxxxxx
Areas of Poudre River 500-year Floodplain Parcel Area in Acres 15 . 1
Areas of 100-year Floodplain (sheet flow) with average Acres in 0 . 5 Foot Floodway 10 . 356
depths less than 1 foot. Additional Approximate Acres in the 0 . 1 Foot Floodway 1 . 685
Low Flood Risk Acres in Flood Fringe 2 . 581
Areas outside of mapped 100-year and 500-year Total Acres in 100-Year Floodplain 14 . 622
Floodplains. Local drainage problems may still exist.
This information is based on the Federal Emergency Management Agency ( FEMA) Flood Insurance Rate Map ( FIRM )
and the City of Fort Collins Master Drainageway Plans . This letter does not imply that the referenced property will or
will not be free from flooding or damage . A property not in the Special Flood Hazard Area or in a City Designated City Of
Floodplain may be damaged by a flood greater than that predicted on the map or from a local drainage problem not Fort Collins
shown on the map . This map does not create liability on the part of the City, or any officer or employee thereof, for
any damage that results from reliance on this information . ` Utilities
Prepared on 10/21 /2010 by GIs
5 of 10
Poudre River Floodplain Map - Proposed Regulations Information
U.
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I I I I Regulation Option 2 & 3
Selected Parcel Boundary Feet
High Flood Risk All floodplain boundaries are approximate. This map only shows
- Current 0 . 5 foot Floodway the Poudre River floodplain and does not show floodplains from
Flood Fringe basins other than the Poudre River.
There is at least a 1 % annual chance these areas will be flooded . Property Address
Moderate Flood Risk Parcel Number XXXXXXXXXX
Areas of Poudre River 500-year Floodplain Parcel Area in Acres 15 . 1
Areas of 100-year Floodplain (sheet flow) with average Acres in 0 . 5 Foot Floodway 10 . 356
depths less than 1 foot. Acres in Flood Fringe 4 .266
Low Flood Risk Total Acres in 100-Year Floodplain 14 . 622
Areas outside of mapped 100-year and 500-year
Floodplains. Local drainage problems may still exist.
This information is based on the Federal Emergency Management Agency ( FEMA) Flood Insurance Rate Map ( FIRM )
and the City of Fort Collins Master Drainageway Plans . This letter does not imply that the referenced property will or
will not be free from flooding or damage . A property not in the Special Flood Hazard Area or in a City Designated City of
Floodplain may be damaged by a flood greater than that predicted on the map or from a local drainage problem not Fort Collins
shown on the map . This map does not create liability on the part of the City, or any officer or employee thereof, for
any damage that results from reliance on this information . ` Utilities
Prepared on 10/21 /2010 by GIs
6of10
Poudre River Floodplain Regulations Review
Frequently Asked Questions
October 2010
Purpose of Review
Q . Why are the floodplain regulations being reviewed?
A. At City Council's request, Stormwater staff is attempting to reduce flood risk in the
Poudre River basin. Further development in the floodplain results in increased risk to
existing properties by increasing the flood elevation, changing the flow patterns and
increasing velocities . By allowing more development in areas prone to flooding,
additional people and property, including emergency response personnel, are at risk.
Q . Why are only the Poudre River Floodplain Regulations being reviewed and not the
other basins such as Spring Creek and Old Town?
A. The Poudre River is the largest watershed in the city, and has the potential to generate
the highest flows, deepest depths and highest velocities during a flood event. The Poudre
Basin is different from the other basins because it cannot be modified with engineering
solutions . The best way to prevent future flood losses is through appropriate floodplain
regulation consistent with industry best practices and community values.
Q . My property is not within city limits . Why am I being notified about these changes?
A. Because some properties may annex into the city in the future, the City wanted to
make all property owners aware of the proposed regulation changes .
Causes of Flooding and Flood History
Q . What causes flooding on the Poudre?
A. Snowmelt, rain on snow, heavy rains resulting in flash flooding, or dam breaks can all
cause flooding on the Poudre River. With snowmelt and rain on snow, the water may stay
high for days or weeks at a time . Flash flooding may result with very little warning time.
Q. Is there a history of flooding on the Poudre River?
A. Yes . Fort Collins is located where it is today because Camp Collins, the original
military post near LaPorte, was flooded in 1864 and relocated to higher ground. The 1904
flood was also a significant rainfall event that resulted in one death and significant
property damage in Fort Collins . The 1904 flood was larger than a 100-year flood. See
the attached flood history sheet for more information on past floods .
7of10
Q . How is flooding different here than in other parts of the country such as Iowa,
Tennessee, Rhode Island, etc . ?
A. Flooding in Fort Collins is not much different than flooding anywhere else. The main
difference is we don ' t have "big river" flooding like on the Mississippi River. We
actually have less warning than most communities due to the close proximity to the
source (i. e . , mountain run-off) . When water hits an urban area and has nowhere to go, it
finds the easiest path through or around buildings, over bridges jammed with debris, etc .
The impact of flooding on property owners and the community is the same whether the
flood happens in Colorado or on the east coast.
Other Solutions
Q . Why can ' t engineering solutions work on the Poudre?
A. The Poudre River Master Plan studied and reviewed a wide variety of mitigation
solutions including structural engineering approaches . Engineering solutions to mitigate
Poudre River flood hazards are infeasible due to the high discharges associated with
flooding in the river and environmental and regulatory constraints .
Q . Won' t the Glade Reservoir - Northern Integrated Supply Project (NISP) reduce
flooding by storing flood flows in its reservoir?
A. No . NISP could reduce flooding somewhat in some situations but it would not likely
help much during the 100-year flood. The NISP project is not proposed as a flood control
project. It can only divert a maximum 1 ,200 cubic feet per second (cfs) using pumps and
assuming an empty reservoir. The 100-year flood on the Poudre is approximately 13 ,000
cfs . Therefore, NISP would have a negligible impact during large floods on the Poudre
River. Furthermore, over the long-tem, NISP would likely reduce channel capacity due
to increased sedimentation and vegetation encroachment. This would result in the
floodplain boundary being widened and additional people and property being at risk of
flooding.
Q . Can detention ponds be built on a property to capture the flood water?
A. No . Detention ponds are used for slowing down the water that falls directly on the
property from rain. Most sites would not be able to accommodate water flowing across
the property from upstream flooding.
8of10
Risk and Property Damage
Q . Is the risk of flooding on the Poudre River exaggerated? There has not been a major
flood on the Poudre River since 1904 .
A. No . The risk of flooding is based on long-term stream gauge data at the mouth of the
Poudre Canyon. We don' t know when the next flood will happen or the severity, but
based on flood maps, we know the areas that have the highest probability of being
flooded.
Q . Everyone talks about the " 100-year flood. " The risk is only a 1 % chance in any given
year. Shouldn' t people be more worried about the risk of fire?
A. Although a 1 % annual chance does not seem like very high odds, it is much higher
than the risk of a fire . Over a 30-year mortgage, there is a 26% chance of being flooded if
your property is in the 100-year floodplain. The risk of fire over that same time period is
5 % . Also, the 1 % risk is only at the edge of the floodplain. The closer a property is to the
river channel, the higher the annual probability is of being flooded.
Q . Doesn ' t flood insurance pay for damages and losses to buildings? Isn ' t it the business
owner taking all the risk?
A. Not completely. Flood insurance has very limited coverage. The value of many
businesses exceeds the amount of flood insurance that can be purchased. In addition,
flood insurance does not pay for business interruption. The entire community is impacted
when services and jobs are lost due to a business not being able to recover from a flood.
As federal taxpayers, we all pay for flood losses when a Presidential disaster is declared.
Q . If residential structures are already prohibited and only non-residential structures are
allowed in the floodplain, how is building more structures a life-safety risk?
A. Non-residential structures still have people associated with them and these people will
need to evacuate and may need to be rescued. Anytime rescues are involved, emergency
response people are put at risk.
Q . Don' t the current regulations account for displacement of water that would occur as
part of a development?
A. No . The floodway sets the amount of "allowable" rise in the I00-year flood elevation.
As properties develop in the flood fringe and encroachments (buildings, fill, landscaping,
curbs, etc .) take up space, the water has to go somewhere . The 100-year flood level will
rise and impact nearby properties, both in and out of the floodplain, causing increased
damages for neighbors .
9of10
Floodplain Mapping
Q . Can the floodplain be modified through a FEMA map revision process?
A. Yes . The floodplain can be modified and a hydraulic analysis can be submitted to
FEMA as a Letter of Map Revision that can change the floodplain map.
Q. If something is wrong with the map, can it be changed?
A. Yes . If the floodplain mapping is incorrect for your property, it may be changed
through a FEMA Letter of Map Amendment or a Letter of Map Revision.
Q . If Option # 1 is chosen, why does the 0 . 1 foot floodway need to be remapped?
A. The 0 . 1 foot floodway is an approximation and will be remapped if Option # 1 is
selected. The floodway is based on older mapping and data (approximately 2007) and
contains inaccuracies resulting from recent City projects, developments, map revisions
and amendments that have taken place since 2007 .
Q. Do the floodplain maps account for debris blocking the bridges?
A. No . The floodplain models assume bridges are completely free of debris so floodplain
maps do not reflect the impact of debris blockages . Debris blockage is highly likely.
Material that comes from damaged structures will result in increased damages to other
properties, both in and out of the floodplain, when the water can' t go through the bridges
and backs up, raising the flood level and/or goes in different locations . Debris generation
and blockage is of great concern to the City and another reason for the proposed
floodplain regulation changes .
4
10 of 10
I
l .
•
Stormwater
ission Statement ,
The cit ' s integrated , sustainable
stormwater management program
shall reflect the community ' s values
of protecting and restoring the Cit ' s
watersheds , its tributaries and the
Cache la Poudre Fiver for mutual
economic , social and environmental
benefits , including :
* Econollg1C .
flood damage reduction ,
increased recreation and tourism
along stream corridors , reduced
business interruptions
• Social .
public safety and welfare , reduced
reed for emergency response ,
recreation opportunities
promoting community wellness
• Environmental .
preserve natural and beneficial
functions of fldplain , enhance
storm water duality and preserve
riparian habitant
Flirt Coffins
Utilities for the 2 Y ` Century. }�
2 Of 39
Stormwater
Program Review.
The stormwater program review in ludes
several interdependent goals :
• enhance citizen safety
protect and restore watersheds and natural
waterways to reduce tied damage
• improve water quality
• manage costs
Fort Collins City Council and Water Board
provide input as part of program review.
Stormwater Program Review Areas .
Stormwater purpose statement
• Best management practices ( B 11P ) policy update
• B1Ps for City-owned properties
Stormwater criteria update
* Detention pond construction and landscaping guidelines
• Stormwater quality map coverage
• Low - impact development ( LID ) policy
• LID demonstration projects
• Stormwater quality sampling
• Homeowners ' association assistance program
• Level of protection policy
• Rate structure for storm water fees
• Floodplain regulations
• Urban stream health assessment
Cnyof
F6rt Colfins
Utilities for the 2 Y � Century. � u
3 of 39
Purpose of Review
Cache la Poudre River.
• t City ouneil ' s request , Utilities Stormwater staff i
attempting to reduce flood risk in the Poudre Firer basin .
• Further development in the floodplain results in
increased risk to existing properties by increasing
the flood elevation , changing the flow patterns and
increasing velocities .
• By allowing more development in areas prone to
flooding ; additional people and property, including
emergency response personnel , are at risk .
The only floodplain regulations being reviewed are for
the Poudre Fiver because
— The Poudre River is the largest watershed in the
city, and has the potential to generate the highest
flows , deepest depths and highest velocities during
a flood event .
— The Poudre Basin is different from other basins
because it cannot be modified with engineering
solutions .
— The best war to prevent future flood losses is through
appropriate floodplain regulation consistent with
industry best practices and community values .
Fir t Collins
Utilities for the 2 1 Century.
4 of 39
Poudre River Basin
About the Basin .
• The Poudre Fiver is the Portions of the river corridor
largest drainage corridor in contain old industrial sites ,
the city. reflecting a time when the river
• The river receives runoff was seen as a convenient
from the city " s local drainage means of carrying off waste
basins ( Spring Creek , products .
Bo elder Creek , etc . ) . The biological diversity ,
Floodplain restrictions have together with the sheer length
limited the amount of building of mostly undeveloped lend ,
in the floodplain but there i combine to create a critical
still significant flood risk . habitat of regional significance ,
• A high concentration of parrs
and open space exist along
the river corridor.
Ir
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r
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' • r T
City. of
--art Collins
Utili#i s for the 2 1 C entury. uh.,,�
5Of39
Floodplain Regulation Review
Cache la Poudre River,
Elements of Floodplain Administration .
• Protect life -safety and property from the effects of
flooding through proactive regulation , emergency
response and long4errn planning
• Encourage sustainable construction practices that
reduce burdens on future generation
• Deduce clean - up costs created by flood - damaged
structures and property, rniniImi ing the volume of
landfill wastes
• Reduce communitywide disruptions of commerce ,
livelihood and services
As part of the Stormwater repurposing effort ,
I-ty Council and Water Board have asked staff t
sor it feedback on the following options ;
1 . Adopt a 0 . 1 foot rise floods
. Prohibit structures in the 100 -year flood plain
. No charge to the floodplain regulations
l
city of
Flirt Collins
Utilities for the 2 11 Century. � ut,
6of39
0 a Ah
reserve Natural and Beneficial
Fu.netions o the Flood l m . Y . -
Floods provide many natural and beneficial functions.
functions.
• If the floodplain is Left open and free
of buildings and obstructions , when a flood
occurs , the water can spread out and slot a
down and not cause damages ,
• Flooding also provides nutrient
replenishment and promotes development
of riparian habitat ,
• Fleodplains help protect and restore the
physical , chemical and biologic integrity of
the rivers -
-- rt Co i
Utilities for the I �' Century. �� ub,
7 of 39
Floodplain Regulations
Main Purposes .
P tect L e � a.f ty.
Having additional people working and
acquiring services in the floodplain results -
in the possible need for evacuation and '�-
rescue . This not only puts the employees
r 4k
and customers at risk but also the
emergency response personnel performing
rescue operations .
Protect Fro erty.
Protection of property is an issue not only for the new properties being
proposed to be built , but for existing properties . By allowing fill and
obstructions in the floodplain , the water is being diverted in different
directions . Properties not currently in the floodplain may be damaged b
water that is redirected at their property and may eventually be mapped
into the floodplain . Additional fall and structures also cause increases in the
flood elevations which results in additional damages to existing properties .
; - � - Debris generated by
structures being damaged
- or floatable materials
being swept off-site can
s cause increased damage to
r downstream properties and
often cause debris blockages
at bridges . When bridges are
blocked , the water cannot
flaw through the bridge and
thus backs- up increasing the
flood level or the water finds a new flow path and floods properties that
may not even he in the floodplain .
FortCollins
Utififies for the 2 1 Century. � ,hl;tie�
6 of 39
Creating History
Cache la Poudre River in Fort Collins .
The location of the City of Fort Collins is where it
is today because of flooding on the Poudre River-
The first military post, Camp Collins , was originally ='
estabilished near the present day town of LaPorte ,
It was destroyed in 1 M4 when T e Poud re River nwk
flooded - Camp Collins was relocated to higher
ground near present day Old Town in Fork Collins .
There are several wellmdocumented large floods _
on the Poudre River around the tum of the
century- A flood in 1891 was due to a darn break
on Chambers Lake . The most notable flood was
in 1904 - This storm was greater than a i DO-yea r
event and resulted in the death of Fort Collins
resident Robert Strauss . The Buckingham. Alta Darr,age was e &weuYtheAnder=ndb nwghbcMwd
Vista and Andersonvi I le neighborhoods were (LefsyAvenue kx4mg rwoh to +roe 06m) areFrne A000
severely damaged by the 1904 flood . in f 90e-
Ntjmerous other floods have occurred on the
Poudre River over time , The chart below shows
the highest flows on the Poudre River from 1864
to today,
The most recent flooding on the PwdFe River was
relatively minor and due to snowmelt in June 2010 -
In the spring of 1999- minor flooding also occurred , _
caused by rain on snow during a warm ger+od in
April_ The flood lasted only a few days . but resulted
in a great deal of bank erosion and threatened
many properties-
Although the Poudre River has not flooded often
in recent years- we know from the past that large on Jum 9, zare, the Poudre Rhw (ko" „arm ftm
floods on the Poudre RiveF ci� n happen- Only the lemay Aaenae) had lbws of about 3,4W cubic fee► per
future will tell how flooding on the Poudre River se mod fc%- Typk.4 & * fts kwabon is toacfa
could change the history of Fort Collins again .
Peak Msctwrges far the Cacho In Poudre Rhw
(remrtletl gage rocand 19$� � per}
� &a 00 _
Ia T
-roc "
Zr
tea '
a 6
City of
Fort Cottons
Utilities for the 2 I Ft Century. ' �- utlliUes
9039
Causes of Flooding
Cache
e Poudre River in Fort
Camse,s of flooding on the Flooding here LS stmilar to
Poudre River. other parts of the country.
nowmelt , rain on snow, heavy rains resulting Flooding in Fort Gollins is not much different
in flash flooding , or darn breaks can all cause than floodiN anywhere else . The main difference
flooding on the Poudre River, With sno melt is we don't have " big river* flooding like on the
and rain on snow, the water may stay high for Mississippi River- We actually have less warming
days or weeks at a tines- Flash flooding may than rrrost communities due to the close proximity
result with very Ine warning time . to the source (mountain run-off) -
When water hits an urban area and has nowhereHistory of floodlg on to go, it finds the easiest path through or around
buildings , over bridges jammed with debris, etc-
the Pbudre River. The impact of flooding on properly owners and
the corn rnunity is the same whether the flood
Fart Collins is located where it is today because happens in Goilorado or on the east coast
-
Garnp Gol" nS , the original military post near
LaPorte . was flooded in 1864 and relocated to
higher ground - The 1904 flood (photos below)
also was a significant rainfail event that resulted
in one death and significant property damage in
Fort Collins- It was larger than a 10O�year flood -
t -
ip
Upsbeam of Poudre River a1 Car?ege
Avenue, 1904
hLa
Mill race bao d hg east toward BuckrVham
neighborhood, 1904
RaffiAoy brdge gpsbuam otLinden $beef,
�. . t circa 1923
ak-
ity of
Linden Slmiet bridge looking ideas#. 104 Flirt Collins
Uffities for the 2 1 ' Century. vtl
10GF39
Definitions
100� Year Floodplain .,
I 00 � Year FlooC plaits
The land that has a one percent ( 1 % ) chance or greater in any given year
of being flooded
F1oodwaNr
W
The portion of the 100- year floodplain with the greatest depths and
velocities — the highest risk area
floodway is defined in order to preserve a portion of the fleodplain
to carry floodwaters without increa ing the water surface elevation
more than a specified amount.
Floodwater is still redirected to areas outside the flooday and may
impact other properties ,
Flood Fringe
The flood fringe usually has shallower depths and lower velocities .
100-year FlOo¢plain
Flaad Fringe City Floodway Flaod F►vjW
6"ble rime
• Fa
Arta of flaadplain that
is allowed to be filled
[fief curet It r€gubGons)
City of
Fort Coll1n .
Utilities for the 2 Y ' Century. ' u,
11 0139
Option 1
Adopt a 0 . 1 Foot Rise # •
This option would expand the area being regulated
as a floodway ( dark blue and yellow on Poudre
Firer Flood Comparison Map ,
• Less area for development ,
More area for flood flows .
• Floodplain modification is still allowed through
map revision process ( FEMAI ity review ) .
If Option # 1 is adopted , the
tloodway delineation must
be updated . As currently 1
shown , the 0 _ 1 foot tloodway ,
`
is considered approximate as ►E-7 FW Aftwo
it is based on older mapping
and data (2007 ) and contains
inaccuracies resulting
from recent City projects ,
development and map
revisions .since 2007 .
af
Flirt Collins
Utilities for the 2 1 � Century. ut,
12 of 39
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ProhibitOption 2
AllFloodplain . f
This option would change the regulations for the
flood fringe .
Floodpl in and floodwa r mapping would not
change .
• Current regulations prohibit residential and mixed -
use structures . This option also would prohibit
non - residential structures +
Fl odplain modification is still allowed through a
reap revision process ( FE 1Af ity review ) .
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city of
Flirt Collins
Utilities for the 2 1 Century.
� 4rJF39
Option 3
No Chan • e to the Regulations .
• The floodplain and floodway would not change ,
Non-residential structures are allowed in the flood
fringe .
• Residential and mined - use structures are prohibited
in the flood fringe .
- �,
Flood 'Lie
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City of
Fort C tlin
Utilities for the 2 I Century, uti
65 �; 39
Other Regulatory Opfions
. . . . . impact.
proveUsing hydra UjIC modeling , property owners would be required to
there impact
2 . No fill and no parking
Others ?34
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F6rt COW
Utilities for the Z V Century. uh
f Ens
Property Impact
Acreages Affected by Options 1 & 20
Current Regulations Option Option
Ao MMYear Amin 4. , ' Adiditiio�fMal Acres in Total Acres in Acres in
Fioodplain Floadway 0_1 -foot %odway 0, 14DO F7ood" Flood Fringe
City Limits 38+0 42 245 178
Growth
Managerneni 860 69 354 576
Area
T i 1 1 598 753
ApproXimately two4hirds of the Poudre River 1000 year floodplain is owned
by City of Fort CollinsNatural Areas and Pans and Recreation or the
U Environmental Learning Center,
F rt Collins
[utilities for the 2 1 �t Century. Od�
T of 39
The table
below summanZeS
changes a three options have on the
indicates . i rions would become more restrictive , black text
indicates current regulations -
Flood Fringe nomod
-FrinqA
� Opkion 1 _ ` 1 Or 3j (Option
not Mowed AyAedp mLd eWg* not + _+
StucWres in FbodFFmp and 1 F % 1erkiml — nol aNYAMINCrMck5miartadnot i ] I
iDINfed. 1 : i or M A ' A
= i it lil Resklef6wbWxe�jse Rw&ideflMand I : 1 4 ' P4md&r6K1 ' 1
RVIge eI i ! 1 aw F i ' . i eI 1 1 F
T f � ! 1 'F! n� nal ZIIEWRd- es W
4 . AD Wed
i 1 1 } 1
requffeaienls-
A ' I ! D ' rl # Aimed- Mk3si show1i " { Allemea
1 ! I I PI 1 . mmulknid
1 + '1 + i i I / h f _ hl y i I i i F • i 1 _ / _ # � i
aJbwed-
exceWs 5^ of Me 07aftl vahiesbiximepriDr lu the ffyprmwpeof or damage F(Y fh& a r -
Mst ovw- the life of f A R ! A e improvement occiffPs. t
shAmum mml be ed oje floodpromled
of
F6rt Coth
Utilities for the 2 1 Century. 1 r
Similar Regulations
in Other Communities ,
More estrletive noedway Criteria
( option 1
New Jersey 0 . 2 foot
Illinois 0 . 1 font
Indiana 0 . 1 foot
Michigan 0 . 1 foot
Minnesota 0 . 1 foot
Wisconsin 0 . 1 foot
No Structures mi the Flood lama
(option 2
Arapahoe County, Colorado
Centennial , Colorado
of
ort Collin
Utilities for the 2 1st Century.
19 of 34
Current Regulations
for • •
[levelopmerrr Metliod Current F mdrr Riser Regul*tin
I}.S Foot Flood%%
Fkedvkmy arad Flaadplam Modification using AbDwod I&A oat spmific n*Lieemuts
Hgdr efic Mudebap. and FEMA litter
of .Mnp Revmon (LO1MR)
FEMALNierofl4Etp Amend men I Ada.Rd
�. (EOMWI r!i' W is
FEMA Letter of 04sp Revision hared
om FM (WML R-F) Nr Developigg is Noo,Residmkxd allowmri muse al vane of
i Fkad Frinp 00F
Build New Structures in Flood Fringe Rm:denualaedMunlLkc am &U&o L
by FJ[►'aliDgurFluuJprautin Ake-Rcokolul aDowrdeausicktiairar
pmf
Additiud Iuitistin Slrur[urrsin lam= and M6rdntlsr onealloaL
#luodFrivur Na� Rrsidmtisl aDo�rx m�assckw�tor
Redr�:elupmrnt in Flood Fringe Romtkiru1 ad Mnzdd alkmedt. vwoll ekyme_
( rebu-ild but not iocrrasr faalprmt) ? �� dnatror
nmKo PWMI
amd6l to 19th ing Sh iK izrss in AJI& aed - &uhuwlul P+aS„oene
i Flood Fringe �equi�cmeois.
Non-sngwt idDevelopmenIinFlood Aikmcd�
e Fringe — parking tuts, 1niis, detenliom
nd%, recreational aenenhim FII
Flaanible llaterittls ,e *l
Critical Facilities %W Aik..xd
Fkadlway Build. NLw Structur-a in FkmAw#y biv Raa+daMa.a1_ Mr+.ed-� �.d �1an•ReadeaMy7 nd
F. lirvalimlurFbudproofing allowad
AdditionsI4ExistingStrocturrsis RcPdrmuLMue&uaeandNc"ccdmul ud
nood-a'ar allnWed
Rrdevekpmeni in Fluod*:Nv (rcharHd kmi&m64 Miiai..m wd NOO idoYldL am
bul am intrtasr fuviprino V[I..red
Remudel to EqkisNnR SIrufirures im Alkl.cd • Wam, 1vzclws mlod -MVnWaw�M
' Fkodwa} nllIllLlrnrnrc
Non-stMccural Uev'e lop ment in Flood Alkmcd histSbawW-nsr
Fringe — parking loin, "2ils. detembom
p&6 recreational amenities, fill
Feloalable Materimis WDt Mowed
Critical Faeiliiier Not Alkwed
Snbwwaw lmpco4t w 4cwCS 'rtlm ft bw or iaWmwwmL w kammK aFdzmaVc equKK or GSC=dS 0% Ul me
muYa "jW 4f ik mynurc Prue a mr ugpr I or . For e6e r'mdre R,vu- ftw ran is rwmMu a ojar mt
b* o[ a a r . Em lb! otber Ctiv Ind, xc m over a me ft� prod I[subsbmhol mzp 0=3� the
mrbae oast be eks M &ndp -e3
City of
Fart Collins
Utilities for the 2 Is' Century. Utilities
20 of 39
Variances
to Regulations .
1 . Variances are allowed .
2a Variances can take Into account mitigating
circumstances and unique aspects of a project
and / or location .
3 '. The applicant must show good and sufficient cause
and theta variance would not harm others .
. The ity 'sWater Board hears floodpl in variances .
. The City is audited by the State and FEMA for the
conditions upon which variances are granted .
Floodplain VariwmAppiitation
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• � SSwT[v�kMrP[rlr�.`rred_
Flirt Collins
Utilities for the Z I Century. ~� ,7I
21 of 39
Structural Solutions
Frequently Asked
id Questions .
f
V4lh can 't engmeenng solutions work
on the Poudre?
The Poudre River Master Plan studied and reviewed a wide variety
of mitigation solutions including structural engineering approaches ,
Engineering solutions to mitigate Poudre River flood hazards are
infeasible due to the high discharges associated with flooding in the
ever and environmental and regulatory constraints .
: all detention ponds be belt to capture
flood water?
Detention ponds are used for slowing down the water that falls directly
on the property from rain _ Most sites would not be able to accommodate
water flowing across the property from upstream flooding .
Won't the Glade Reservoir 4 Northern Integrated
Supply " ecl 1 I P reduce floc in. by storing
flood floras ire its re.srvoir
No . NISP could reduce evading somewhat in some situations but it
would not likely help much during the 100 -}year flood . The NI P project
is not proposed as a flood control project, It can only divert a maximum
1 , 00 cubic feet per second (cfs ) wing pumps and assuming an empty
reservoir. The 100 -year flood on the Poudre is approximately 13 , 000 cfs ,
Therefore , NI P would have a negligible impact during large floods on
the Poudre F lver_ Over the long -term , NI P would likely reduce channel
capacity due to increased sedimentation and vegetation encroachment ,
This would result in the floodplain boundary being widened and
additional people and property being at risk of flooding .
Otyr of
Fort Collins
Utilities for the 2 1 Century. le� �
22 of 39
Floodplain Maps
Methods to Revise .
Two Pnn1 ry Methods for vis' Flood plain Map
Map Amendment CITY OF FORT COLLINS
FLOOD RISK MAP
• Corrects mapping based on
existing conditions , , I --^Y
• Property owner provides survey work i f --
to show areas that should not be - - —
mapped in the 100-year flood plain . �~
Based on comparison of ground
elevations to the 10ayear flood —
elevations .
The fjoodway cannot be revised
using this process , jr .T {
• No fees for this process . f
-awn-
• FE fA mast approve changes , '- - y ' -
Map Revision Al i n - } f
A
HydraulicModeling
• Revises mapping based on =
constructed changes , ; �^ ---- - � - --
• The hydraulic model is used to show how changes to the ground
( cut and fill , bridges , etc , ) change the floodplain mapping .
• Many specific regulations and criteria must be met depending on the
location of the work ( such as flood fringe versus floodway ) ,
• The flood ay can be revised using this process ,
• The public and affected property owners are notified of these changes
and have the ability to appeal the mapping ,
• A registered engineer must stamp the report and revised mapping ,
• FEMA has a fee separate for this process — the ity' s fee i 00 ,
The City and FEMA must approve the modeling and
mapping changes .
City 0f
Fort Collins
Utilities for the 2 1 31 Century. �- uh,
23 of 39
Floodplain Mapping
Frequently Asked Questions ,
Can the floodplain be modified though a FAA map
revision process?
Yes . The floodplain can be modified and a hydraulic analysis can be
submitted to FEMA as a Letter of Map Revision that can change the
floodplain reap .
If Something is wrong, can the nmp be charged ?
Yes . If the floodplain mapping is incorrect for your property, it may be changed
through a FEIVIA Letter of Map Amendment or a Letter of Map Revision ,
If option # 1 is chosen, why does the 0 . 1 foot
floodway reed to be remapped'
The 0 . 1 foot floodway is an approximation and will be rernapp d if Option # 1
I
s selected - The floodway is based on older mapping and data ( 007 ) and i
contains inaccuracies resulting from recent City projectsT developments ,
map revisions and amendments that have taken place since 2007 .
Leo the maps account for debris blocking the bridges?
No . The floodplain models assume bridges are corn pletely free of debris
so floodplain maps do not reflect the impact of debris blockages . Debris
blockage is highly likely. Material that comes from damaged structures
will result in increased damages to other properties , both in and out of the
floodplain , when the water can `t
go through the badges and
--y: backs up , raising the flood level
and/or goes in different locations .
Debris generation and blockage
is of great concern to the City
_ ML and another reason for the
- _ -. � ' '�'- _ proposed floodplain regulation
_ changes .
Poudre River raffroad frasSe opsfrearn of Cohege Avenue. city of
A f - E6rt Collins
Utilities for the 1 Century. �
zass
Community Rating System
FEMA • City of Fort Collins.
The Community Rating System ( ) is s voluntary
incentive program through FEMA .
• The CRS recognizes and encourages community
floodplain management activities that exceed
the minimum standards of the National Flood
Insurance Program .
• 1 , 285 communities nationwide participate in
the CRS .
Fort Collins has a Class 4 CRS Rating and is one
of the top nine communities nationwide
• Benefit is discount on flood insurance premiums .
Fort Collins residents and businesses receive up to
a 0 % discount
— 416 flood insurance policies in Fort Collins
- $ 105 million of flood insurance in force in city
— $ 265 , 000 in annual premiums
— $ 56 , 300 annual discount corn munit - ride
— $424 average annual discount in the FEMA
1 00 - rear floodplain
— average annual discount outside the FEMA
1 0 - gear floodplain
fort Collins
Lit,
25 of 39
Community Rating System
FEMA and City of •
• CRS ratings are biased on activities undertaken b
communities in the following categories :
Public information ( Flood Awareness Week ,
mailers , website , etc .
— Flood protection assistance
— Floodplain mapping and flood data
— Preservation of open space
— Higher regulatory standards ( such as floodpl in
regulations )
— tormwater regulations (for example , detention and
water quality criteria )
— Acquisition and floodproofin
— Hazard mitigation planning
— Drainage system maintenance
— Flood warning system
— Levee and dam safety
FEMA:!s CommKM Ra" 8ysimn (CRSI
Came rabrz nr CRs Cise
Y h�pP
ii Cm 0 V%
C� 9 7
f Gir • �
a0 Cr ♦ iiz
E am i M%
XQ Chm } Za
cam
� alm 3 WK
C� 2 Oft
Gd 1 "S
70
r
E } ■ 7 E i a i i {
[4 • B+4
T= Sara 7 rik C15. '�S
T: w4eI #Pe PMm' FJM*i�Ffar. :i "l
City of
Flirt Collins
Utilities for the 2 X � Century. ut
-
26 of 39
Stormwater
Master Planning Philosophy.
Elements of the Master Plan .
• Recommended projects to reduce flood damage to tomes
and businesses and reduce flooding of roads
• Guidance for new development in the basin
* Guidance for enhancements to the riparian habitat along
stream corridors to improve water quality
• Guidance for stabilizing streams where necessary
We strive to design cost-effective projects that
provide flood protection for a 100-gear rainfall event.
Finding Solutions to Flood Damages—Basic Approaches .
• Regulate and Respond .
Enforce our existing floodplain regulations and development
criteria . Utilize our floodarning system . No projects to reduce
flood damages . Outcome : keep damages to current levels .
• Buyout Properties in the Floodplain .
Reduce damages by removing structures from the floodplain .
• Evacuate the Water Faster.
Build bigger channels and pipes to more water out faster and
reduce the floodplain . Outcome : reduce flood damages .
• Slow the Water Down .
Build detention ponds to control water and slow it down so
it fits into channels and pipes downstream . Outcome : reduce
flood damages .
• A Combination of Any or All of the Above.
The recommended plan typically includes a combination
of approaches .
Fort Collins
Utilities for the 2 1 � Century
Poudre River' Basin
Probfems Identified10
• The 2001 Master Plan identified approximately 3 , 160 acres
of 100 - gear #loodplein between Taft Hill Road and l -2 .
• Approximately
188 structures
were identified in - f
the Master Plan _ � -
as being damaged
in a 1 0 -gear flood .
r
• Damage to
.z
property, utilities
P �
and infrastructure
caused by the _ `-
100 - gear flood was
estimated to be -
. 5 million in 2001 . ` - Y
Additional damages -
would be expected
due to significant
erasion along the = _
river corridor. y
Additional damages _
would be expected
due to debris - ; -
blockage at bridges .
City port Collins
Utilities for the 2 1 t Century.
za of 39
FAV
• Multiple alternatives were
evaluated for reducing or
eliminating flood damage and
for controlling erosion ,
including : ` T =
y
- structural improvements such
as levees or channel
improvements
- floodplain regulations - -
- #loodproofing - -
- purchasing flood insurance
- purchasing property
Solutions were site specific and intended to reduce damage
to existing structures only,
fro solutions were identified to specifically reduce the
floodplain on undeveloped land .
• Due to the expense and environmental effects of building
flood storage further upstream , a flood control dam is not a
practical solution .
The total cast of the projects ranged from $ 3 . 8 million to
S31 , 3 million , depending on the specific solution chosen
at each site , A reasonable estimate of the expected
expenditures was approximately $ 15 million .
The benefit- cost ratio varied from less than one
to over five , depending on the project , City. of
F&ICollins
Utilities for the 2 Y Century. � U131
039
2001 Master Plan
Completed Pro J ects .
Several projects have been Oxbow Levee _
completed along the river, reducing Construction of the Oxbow Levee
the number of structures at risk and (photo below) provides protection
eliminating overtopping of roads to the Buckingham neighborhood .
during a 100-gear flood even# . Over 56 acres of land were taken
out of the 1 DD-year floodplain Prospect � Bridge andn .
Bank Stabilization .
anstruction of a new bridge
eliminated overtopping of Prospect
Road during a 100-year flood
event . This project also reinforced
the bank to prevent the river being
captured by the l iverbend Ponds
gravel pits . Ten acres of land were
taken out of the 100-gear floodplain
in the Countryside Estates
neighborhood . Le ay Avenue Remappings
The ffoodplain east of Lemay
Avenue and north of Mulberry
Street was reamapped by FEIVIA .
Over 121 acres of land were taken
out of the 100-gear floodplain .
Timberline load Bridge .
The Timberline load extension
eliminated aspill over the right bank
of the river. Over 105 acres of land
were taken out of the 100 -gear
floodplain .
Cfty,F6r!C livin
U ' 'ties for the 2 Y Century, Poo" - Ut
30 of 39
Watershed Approach
Stormwater Quality .
" it All Drains to The Pou lr . "
Pollution P"reverition .
• Minimize use of lawn chemicals
• Deep cars in good repair ( no leaks )
Dispose of all wastes properly
tormwater rl 'reatrnettf .
Regulate erosion control at construction sites
• Construct stormwater quality ponds
Maintain water quality wetlands
Habitat ,
• Evaluate stream habitats
• Ensure assessment is a component of master plans
Look for opportunities for protection and restoration
Rain falls on landscape and Land Pollution Prevention ,
on fts way to the river. picks edurate people art ways to
UP pollutant$ (Pesticides , eliminate or manage pollution .
fertilizer, pet waste , cleaning Set regulations to prevent pollution
agents, and oil or antifreeze from reaching our rivers .
from leaking cars )-
Water flows as runoff into resign tributary system to minimize the
storm drains in the street, amount of pollutants reaching the stream and
carrying poCutants from cars - build detention ponds and
fertilizer. paint , outdoor wetland areas that allow pollutants
eleaning agents , dirt. etc- to settle out before reaching the river-
Pollutants affect water Actively restore and protect habftat
quality and the wildlife that and consider the end result of our projects
depend on it- Impervious on nature-
surfaces cause water to run
off faster, creating erosion that
can damage Over ecology,
Chy, of
. s� F6. rt Coilln �
Utilities for 1 e tur . , ,�
utItbes
31 of 39
Flood Risk
Information .
1 . Property in the 100 -year tloodplain has a 1 % chance or greater in any
given year of being flooded .
2 _ Over a 0- year period , there is a 26 % chance that a property in the
100 -yea { floodplaln will be flooded - For comparison , there is only
a % chance that the building wild catch fire during that same
0 -gear period .
- Some properties have an even higher nsk of flooding because they are
in areas where smaller, more frequent flood cause damage .
Table of Odd, for Different Events .
SbmcWre in therear floodplain being flooded in am gi+ren ym -. - --
pLsts Powerball in the Powerball Latiery - _ --
Structure in the 5WytLr1loadolaili na flooded in a
i!le� car accident Iyou drive 10 . 000 miie; ear . 1 in 4mDQQ
Be( st- - -tom+ - — - - -- pQ0
a
Winning the Powerball Lottery jackpot (matching five numbers and the Powerball) 1 in 120,526,770
(
IC ity of
Fort Collins
Utilities for the 2 V# Ceiiftiry.
32 of 3g
Risk and Property Damage
Frequently Asked Questions .
Doesn 't flood insurance pay for damages and los&w
to building Isn't it the bust owner taking all
the nsk
Not completely. Flood insurance has very limited coverage . The value
of many businesses exceeds the amount of flood insurance that can
be purchased . In addition , flood insurance does not pair for business
interruption . The entire community is impacted when services and jabs
are lost due to a business not being able to recover from a flood . As
federal taxpayers , we all pay for flood losses when a Presidential disaster
is declared .
Don ' t the Current regulations account for
di pLwx ent of water that would occur as part
of a development .?
o . The floodway
sets the amount
of "allowable' rise
in the 100-year —
flood elevationr As
properties develop
in the flood fringe ri
and encroachments
l
( buildings , fill , -
landscaping , curbs , _a
-Law. ,
etc . ) take up space ,
the water has to go -
somewhere . The '
1 00 -gear flood level
will rise and impact nearby properties , both in and out of the ffoodplain ,
causing increased damages for neighbors .
of
Fort Collins
Utilities for the 2 1 Centtt y. `�
33 of 39
Risk and Property Damage
Frequently
q i Asked
ed Questions .
I the risk of flooding on the Poudre River
exaggerated? There has not been a major flood o
the Poudre liver sire 1904 .
o . The risk of flooding is based on long -terra stream gauge data at the
mouth of the Poudre Canyon . We don ' t know when the next flood will
happen or the severity, but based on flood maps , we know the areas that
have the highest probability of being flooded .
Everyone talks about the
" I 00 ; year flood . " The risk
ILS oily a I oho chance m any
V en year. Shouldn 't people
be more worried about the
risk of fire?
Although a 1 % annual chance does not
aesrorrrrt�a ,� oro�►drerr .ar� ass_ seem like very high odds , it is much
higher than the risk of a fire _ Over a 0-gear mortgage , there is a 6 %
chance of being flooded if your property is in the 100-gear #ioodplain , The
risk of fire over that same time period is 5 % . Also , the I % risk is only at
the edge of the floodplain . The closer a property is to the river channel , the
higher the annual probability is of being flooded ,
If residential structures are already prohibited and
ordy o � residential strucftwes are affovved Mi the
floodplain, how is building more structures a life
safety rV
V
Non- residentia ) structures still have people associated with them and
these people will need to evacuate and may need to be rescued ,
Anytime rescues are involved , emergency response
people are put at risk . City of
Fort Coth
[utilities for the 1 Century. `�- ulll
34of39
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Poudre Fiver Flood Risk Cross Section
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Historic Channel Changes and Past Development Along the Poudre River
- J • _ . • •1937
a ? if-
� w '
1 t, � •1e• e - • ey
Page 39 .
Summary of Frequent •
Comment Theme from Open House Frequency
This adversely impacts businesses . 26
The regulations are OK the way they are currently.
There is a lot of money being spent on this effort by the City. Seems wasteful . 14
Seems like over regulation by the City.
Support for increased floodplain regulations . 11
This seems like a taking or condemnation . Compensation is needed for affected businesses .
The risk is felt to be low. 9
Support for most strict option of no structures in the floodplain . 7
The Poudre River should be allowed to run naturally. 6
A lot of community and City effort has gone into the North College area . These regulations would negate all the money and 5
effort already spent .
Don 't allow property owners to flood or impact property owned by others . ( No Adverse Impact) . 4
Fort Collins is already more restrictive than most communities . 4
Public Safety should be of highest priority. Building in the floodplain is dangerous . 4 D
D
C�
2
m
z
0 cn
Poudre River Floodplain Regulations
PublicI
Open House • • 2010
Category
Affected Comments:
Economic An economic disaster. Furthermore , a gross overstepping of the bounds of government. Waste of
taxpayers money on an issue already thoroughly vetted . Neil McCaffrey
Economic Anything that destroys business potential as land value on river properties should be avoided . The
status-quo has served .
Economic As a property owner within the floodplain I am very concerned about the adverse economic impact
on my property if the floodplain map is modified . It seems like a condemnation of our property and
something that will have serious adverse impacts on us . It sounds as if we would need to spend
money on engineers just to find out and defend the status quo . - Richard Oneslager
Economic Basically, per your options - no residential or mixed use building - period . A - it appears that you can
make our properties worthless as to the fact that lenders would not make loans on our properties and
houses . B . - How do you intend to compensate us for taking away our rights to build or to obtain
loans . 2 . Looking at your chart, the flow has not exceeded the 100 year discharge in the last 100
years and only 4 times was more than 50% of the 13, 330 cfs ( 100 year discharge) . Don't you feel
you are extreme? 3 . We live outside the City limits . Because of the GMA can you do this to our
property without representation? - Gary Olsen
Economic Don't waste time and money on this . Too small a chance of flood . Current standards are sufficient. -
Bonnie Zidorn
Economic I am not sure why we need to have the strictest floodplain regulations in the nation . Health safety
and welfare are important safeguards but they must be balanced and fair to property owners who
purchased properties prior to these restrictions . - Scott Woops
Economic I am shocked at the magnitude of the effort that must have gone into this presentation . This reeks of
$ . How much was spent on this in charts and graphics . It screams this is the way we are moving
forward . This is not an open venue for discussion . It is we are doing this and that is it!
Economic I cannot believe that our City would spend so much time and money to develop a plan to
successfully develop a North College Business plan , create URA districts, promote growth and then
wash all those plans and opportunities away by trying to implement a new floodplain plan . Save our
money and leave things as they are .
Economic I feel that the current floodplain adequately addresses the Poudre River. I don't understand why the
City staff and Council are spending valuable time and important tax dollars to look at an area that
does NOT need attention . Historic data suggests that we are protected . As a City we should address
more important issues and support the business community.
Economic If the City won 't compensate property owners for their loss of value with more stringent regulations
they should not proceed with this change .
Economic If the floodplain is changed as recommended by staff and the Water Board , this equates to eminent
domain with no compensation . Further, monies spent by the City in years past to develop corridor
plans , to mitigate the Dry Creek floodplain , etc . . . will be largely waste. The City would then have to
redo all of the plans for North Fort Collins and the URA. Financial models would have to be re-done .
Property and business owners would most certainly be forced out of business or pushed to
bankruptcy in the coming years, or they would lose their investment/retirement.
Page 1 of 6
2of7
Poudre River FloodplainRegulations
CommentsPublic
Open House Novemb - 2010
Categoty
Affected Comments:
Economic If you pass this new regulation , you will be stealing $3 ,000, 000 from my family. That is three million
dollars . We don't like this . It will be very bad for us . You should have built your bridges strong
enough in the first place . - David Hoffman
Economic Is there compensation for taking our rights to build on our property.
Economic It appears that there are only two options presented today. I would recommend what was the 3rd
option : No action . Our regulations are already the most strict in the state. And we've already spent
way too many dollars in many City departments studying this issues . Make no changes .
Economic It seems that The City bends or changes the rules for those in favored positions . New Belgium , In
Situ , the development north of Vine off Linden , all fill in lots of dirt to raise ground level out of the
floodplain , while others are prohibited . - Tim Jackson
Economic Just how much money did this event cost? Who is paying for a speaker? Beg for a tax hike then
waste money like this . - Heather Walhart
Economic No new development in the 100 year floodplain . The question is "present taking" for current
landowners versus "future taking" from societal mitigation of flood and flood relief. The City has no
obligation to provide services in the 100 year floodplain for new development. Any structures - lost in
the flood shall not be replaced except for road crossings and bridges, sewage treatment plants . Do a
"strategic retreat" from floodplain as all infrastructure has a finite lifetime - when it is time to replace -
move out of floodplain if at all possible. 30-50 years . The City should not provide any new services in
the 100 year floodplain - no utilities. - Tim Johnson
Economic Please remap before making decisions that will effect private property values . Leave the present
regulation the way it is .
Economic Risk and property damage FAQs. If residential is not allowed do you think the non-residential owners
will not take preventative action to protect their staff, supposedly Fort Collins has sophisticated
warning system in place!
Economic Seeing that FEMA is and has been the national standard setting entity that all municipalities have
followed in setting their flood regulations, why would Fort Collins adopt a new regulation that is 10
times more restrictive from a measurement calculation? Secondly, do you think it prudent to expose
the City to a possible class action damages suit from the City's indirect taking of their property
rights? Craig Haw
Economic Since the current regulation we adopted in 2007 it seems irresponsibly premature to consider
changing them again . Especially since the City has recently invested tens of millions of dollars in the
North College Corridor that would be adversely affected by the proposed changes .
Economic The City brought a person in who is obviously for making the change of floodplain , with no one to
present the opposing side. It's obvious what the City wants to do, so why are we spending all of this
money to prove their case? This man uses derogatory terms and falsehoods to make his case .
"McMansions" "fact instead of opinions" . When will we see someone representing the other side?
Don't tell me that public safety requires this , 1 death in 146 years .
Page 2 of 6
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Poudre River Floodplain Regulations
PublicI
Open House • • 2010
Category
Affected Comments:
Economic The City is over the top this time . No money in the City's coffers, yet you have the unmitigated gall to
spend an enormous sum to thwart the publics will . It will only lead to a costly legal battle. Regulations
over and above FEMA's are uncalled for. This is yet another attempt by the anti-business majority of
the council to push their agenda and they will be stopped . - Charles Mesrtlian
Economic The current floodplain protects land and property adequately and was just reviewed by the City in
2007. It does not need to be changed in such a short time . This is unfair to property owners and
people who purchased property since 2007 . - David Wasson
Economic The project is an overkill .
Economic There is sufficient regulation in place . There is no need for additional regulation .
Economic This is a solution in search of a problem . We already have the highest requirements in the nation . It
is inappropriate for us to limit these property owners rights when there is no science to support the
changes . Don't do this !
Economic Too rigorous changes - very little respect for property rights . Overstates risk - ill defined issues . Too
much government bureaucracy creating more work for themselves.
Economic We are very satisfied with the present situation . We do not plan on building any structures . But
moving of our material would seriously impact our property.
Economic We must stop development in the Poudre River floodplain for the safety of the public. The entire City
population pays higher stormwater fees to implement flood control measures to keep everyone in
Fort Collins safe . We pay every month to keep all citizens safe from floods . This is a shared cost to
keep all citizens safe from floods . Public safety requires shared costs and shared sacrifice. - Scott
Mason
Economic We presently have strict enough regulations as it is . Why would council want to go in reverse to
undo all of the positive movement in the URA area . We are negatively affecting humans that own
property in this floodplain area . There is no way that any changes should be made .
Economic We should move toward prohibiting new development in the 100-year floodplain , or at least find a
way to compensate property owners for potential damage caused by development inside the
floodway.
Economic What did it cost to do the survey and determine the 0 . 1 ft floodway?
Economic What has this project cost the City in dollars? This project is a overkill .
Economic Why doesn 't the City leave everyone alone . They change the rules frequently. This subject should be
between the property owners and their insurance companies.
Economic Why is the City raising this issue now? Our government just reached out to the taxpayers with a tax
initiative that said the city did not have enough money to maintain current services . Changing the
floodplain will take money away from the City and will cost money to implement. Let FEMA
regulations guide without current regulations from the City. Too much government chokes
businesses to death .
Economic Won 't be able to get loans on our properties .
Page 3 of 6
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Poudre River FloodplainRegulations
CommentsPublic
Open House Novemb - 2010
Categoty
Affected Comments:
Environmental Can the City provide a detailed cost/benefit analysis of mitigation alternatives other than simply
changing the flood risk standard?
Environmental Has the Stormwater Utility determined the specific population at risk (i .e . the number of people) with
the current regulations vs . the proposed regulations? Do we know the dollar impact of changing the
regulations?
Environmental How does the City propose to control for changes upstream from the City limits which will effect flood
patterns within the City limits . Shouldn't basin wide standards be implemented instead?
Environmental In a discussion about changes to Poudre River floodplain . (dishonest) certainly misleading to post
pictures of 1997 Spring Creek Flood . How about improvements/structures to reduce floodplain not
expand areas improve areas .
Environmental Protecting the floodplain protects the river, the taxpayer, and property owners . This is a great
educational effort by the City Staff. - Gary Wockner
Environmental We have already developed too much of the Poudre River floodplain . We need to stop developing
the floodplain to allow the increased flows in the river to spread naturally to reduce damage
downstream . - Scott Mason
Environmental We simply must respect and protect the Poudre River. Allowing new structures in the floodplain
directly impacts the river and adjacent/nearby/downstream property owners . It is not fair to those
other property owners to allow development in the floodplain . Give the river room , respect its power
to destroy as well as renew and we will all be better off. - Mark Easter
Environmental Will this create multiple brown fields . . . i . e . when existing properties in floodplain deteriorate to the
point of need "substantial improvement" , perhaps condemned , what would be the impact to the City?
Social I have yet to see the cost/benefit analysis presented that even begins to quantify the negative impact
to which the community, it's businesses or it's people are at risk. Comparison's to national disasters
across the country simply do not hold water (pun intended ) . - Matthew Hoeven
Social Our current regulations protect life adequately. By increasing the floodplain jobs will be lost. This is
not the time to over-regulate ! Many people are unemployed , and I know dozens of businesses
whose property value would drop to near nothing .
Social Staff has mentioned in several presentations that "if even one life is saved" the recommended
changes are worth it. If we use this analogy, then we should not allow any development in any
floodways in Fort Collins including areas that could be flooded if the dams at Horsetooth should fail .
Further, if the city implements the recommended changes, then to be 100% sure to eliminate the
change of lives being lost, all current structures, all trees, anything in the floodway, should be
removed . So that nothing would be swept down the river should a 100 year flood occur. Greg Woods
Social There is a point at which the government needs to draw a line on unnecessary regulation . This is yet
another example .
Social Very very dangerous to job growth in Fort Collins . That in turn has a negative impact on schools , on
family life .
Page 4 of 6
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Poudre River Floodplain Regulations
PublicI
Open House • • 2010
Category
Affected Comments:
Social We already have the most stringent ( FEMA) floodplain regulations in the state , why do we need
more . I view this as a direct violation of property rights , and development obstruction . The City
should spend time on economic development, not pushing it downstream . - Chris Guillan
Social We have to stop all development in the Poudre River floodplain . It is dangerous and a legal liability
to allow development to put other land owners and users at risk. - Scott Mason
Social When did the Army CORP of Engineers straighten the river? Based on the graph , it looks like the
flood or high water levels have been lower since then . Is any kind of change needed?
Economic/ Brian Janonis issued a public statement in July 2009 to the effect that Fort Collins has more
Social restrictive floodplain regulations than 95% of the state. In these uncertain economic times , why is the
City wasting money on trying to be the most restricted? The floodplain regulations should remain as
they are to avoid what essentially will result in a "taking" from our property owning citizens .
Economic/ I understand and appreciate to protect property and life in case of floods. However, this proposal
Social appears to go beyond a reasonable level of risk. In addition this will severely and negatively affect all
the positive steps that have taken place along North College Avenue . I would like to see The City
work with the three primarily affected areas ( North College, Mulberry, and Lincoln Greens) and figure
a way development can continue in these areas and implement the more restrictive regulations in
the rest of the corridor. The property owners along North College are small business and property
owners , their ability to develop and pay for plans to move forward with a variance is extremely
unlikely. There has to be a way to enable these few areas to develop and prosper without going
through and arduous variance process . Please consider that as you formalize the actions that will
change the current regulations .
Economic/ It is always a balance between risk and benefit. Leave the area alone . Current regulations are
Social adequate - more regulations from areas in the US that are frequently flooded do not apply to a
semiarid climate - the financial costs to North College and Fort Collins is greater by implementing
new regulations .
Economic/ Should these proposed regulations be approved , the economic impact to the City, citizens , DDA,
Social DBA and County will be devastating . In these uncertain economic times this would be extremely
short sighted . The floodplain regulations need to stay as they are.
Economic/ The definition of safety - how safe is safe - these proposed regulations of 0 . 1 are very restrictive and
Social unrealistic for safety purposes . This definitely has a negative impact on economic development. Why
pursue this 0 . 1 when it will impact potential economic improvement. - Tom Frazier
Economic/ The water board approved the proposed changes without any sort of economic impact analysis
Social whatsoever. This is unacceptable. Where is due process? To make this sort of recommendation on
insufficient information is reckless and irresponsible . Especially in a down economy.
Economic/ This is an illegal taking of land by regulations . If you want this as open space , quit buying land in
Social Wyoming and use the money here to pay fair market value for properties you want to protect. The
life safety argument is a smokescreen , Poudre has not had serious flood damage in decades . - Dave
Murcy
Page 5 of 6
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Poudre River Floodplain Regulations
Public I
Open House • • 2010
Category
Affected Comments:
Economic/ How much money was spent on the printed materials for this event? It doesn't seem to be very green
Environmental/ or fiscally responsible to print so many oversized glossy items for the limited use . I believe the
Social utilities department is spending unneeded money on an agenda of a few extreme environmentalists .
The speaker added no value what so ever.
Economic/ I am for regulations that let rivers run their course - protect floodway and floodplain and move people
Environmental/ out of those areas where possible . Just want to express my support for stricter regulations in the
Social face of all the hostility I 'm hearing tonight. Where you can , get people out of sensitive areas .
Economic/ I support the option of no building in the 100 year floodplain . This protects the life safety, health ,
Environmental/ economic future and environment for all . It also preserves the river for the future . We have no right
Social to compromise the Poudre River now by over developing in the floodplain and destroying the river
for the future.
Economic/ I would not like to see any options preclude promoting the downtown section of the Poudre from
Environmental/ having some development such as performing arts (theatre, music venue) , restaurants and
Social connecting walkways . Let's get people in the town to really appreciate this wonderful resource . This
will be good for the economy and for our social community cohesiveness . I do not think we should
allow fill in the 0 . 1 , 0 . 5 or 100 year floodplain . This looks like what was done in the 60s and 70s by
Army Corps of Engineers to channelize rivers . This seems to worsen affects of floods. Can we have
construction design criteria of buildings built on stilt structures so water could pass through if a flood
occurs? - Karen Roth
Economic/ In striking "balance" between public safety and economic vitality, public safety must have
Environmental/ overwhelming priority. The current allowance for 0 . 5' rise is too liberal and risks public safety. The
Social 0 . 1 ' rise option is better but still compromises safety. The only truly defensible option is #2 which
would assure no compromise of safety going forward . No Adverse Impact ( NAI ) has promise in the
future but will take years to design and implement. - Greg Speer
Economic/ The pretence of the subject is disingenuous in the presented form . The options presented have only
Environmental/ cursory health and safety benefits. This has been designed as a public taking of what little remains
Social of private property in the corridor. In the absence of accurate mapping , consideration of cost-benefit
analysis is problematic though no economic or opportunity costs are even presented .
Economic/ The rules keep changing . Leave everything alone and quit wasting taxpayer money on this . - Tim
Environmental/ Jackson
Social
Economic/ These are over reaching and unnecessary. We have strong regulations now and changes made now
Environmental/ affect property owners in a negative manner. Strongly Oppose .
Social
Economic/ This seems to be an overreach to limit potential infill and redevelopment along the Poudre River
Environmental/ corridor. I believe the safety risks are being overstated to promote a no growth environment at all
Social costs mentality. I can't believe that the City would go so far to limit the development potential along
North College .
Environmental/ If this was really a life safety issue you would apply it to all 10 floodplains in the City. It feels like an
Social attempt to expand natural areas without paying for them . If that is the case , then just do that and
leave the economic base alone! I see no data based decision making here - way below Fort Collins
standards !
Page 6 of 6
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ATTACHMENT 6
PublicPoudre River Floodplain Regulations
•
Community • and Individual Comments
Category Comments:
Affected
Economic If you look at the properties affected by the recommended alternative , there are really only three
areas of the corridor that have any development opportunities . They are; the North College Avenue
area (which the City spent millions of dollars improving the Dry Creek Drainage Channel so it could
be opened for more development) , the Lincoln Greens property, and the Mulberry corridor. I would
like to see an option that looks at possible development options and opportunities in those three
areas of the channel and allow the recommended alternative (no development in the floodplain )
implemented in the rest of the channel . If I ' m mistaken , and there are other major developable
parcels around 1-25 and Harmony (or elsewhere) I would like those to be included with the three
aforementioned areas . -Mike Bello
Economic I would vote for option 3 - leave things alone . - Mark Bradely
Economic The proposed changes . . . appear to have a significant negative effect on our property. Based on the
maps that your letter included , and our discussions , two of the three proposed options will render our
property undevelopable . The only option that does not sterilize our property is the option to leave the
existing regulations in effect. In 2008, the State Land Board undertook extensive work to obtain a
Conditional Letter of Map Revision Based on Fill for this site, with the intention to move forward with
annexation , zoning and redevelopment of the property in Fort Collins . Should the proposed changes
take effect universally, it is my understanding that the City will no longer recognize this approval from
the Federal Emergency Management Agency, or would require that the State go through additional ,
more rigorous and much more expensive studies to obtain additional Federal approval (a CLOMR
and LOMR).
These proposed changes, applied universally, will take all future economic use of the property from
the School Trust. We would like to encourage the City to review properties such as ours on a case
by case basis as we cannot support these revisions as they stand today. - Colorado State Board of
Land Commissioners
Economic Residential development is not currently permitted within the flood fringe . Commercial development
faces significant challenges , perhaps less from a regulatory standpoint than economic impediment
and political perspective . All proposed options but status quo seek a de facto transfer of property
rights to public purpose. i .e . trails , parks and open space would be permitted ; any structure with two
or more sides would not. So now my personal property is swallowed up along with my tax dollars to
support open space objectives, which diminishes my capacity to generate the sales tax revenues
utilized to legally purchase property rights? Somehow I feel as though we are trapped within an
economic model devised by M . C . Eicher.
social The City currently boasts one of the highest ratings for storm water management and the lowest
rates for flood insurance in the country. Further augmentation of standards would challenge the
voracity of scientific modeling as unquantifiable variants would produce greater impact than marginal
refinements to prevailing code . In other words, the City can work towards a mandate to remove of
all structures and public access within the floodplain , but a dislodged cottonwood would pose a
greater danger to public safety than a brain-dead motorist. The very nature of hydrological
engineering assumes a `fudge factor' attributed to unforeseen conditions that is greater than the
likelihood of known perils once a community achieves a safety threshold currently enjoyed by City of
Fort Collins . Shouldn't we consider the elimination of all trees along the corridor if we' re going to
prohibit storage sheds?
This issue is clearly not driven by any health or safety concerns . Were that the case , drainages that
host residential development would be first on the list for more stringent control standards. This
exercise is driven by a political agenda to prevent future commercial development along a corridor
that possesses tremendous potential to grow the local economic base . We all recognize the
drainage basin of the CLP is significantly larger than all others within the city, but we also know the
basin has far greater capacity to absorb and diminish the impacts of high flow events that might
otherwise threaten loss of life and property. - Joe Rowan
Page 1 of 3
1 of 13
Poudre River Flood plain 1 1
Public Comments
Community • and Individual Comments
Category
Affected mmmil
social Strongly recommend option 2 (no structures in floodplain ) . Society can not afford the costs
associated with damage that will inevitably be caused by option 1 (0 . 1ft allowable rise ) or option 3
(no change in regulations, 0 .5ft allowable rise) . To preserve the economic, social (recreation and
safety) and environmental values of the floodway, option 1 or 3 can not be allowed to proceed . -
John Giordanengo
Economic This appears to be over regulation by City Government. We are already 100% double FEMA
regulations why should we be 10 times . Private property owners should be compensated . The
hidden agenda here is regulated open space and it is a taking . -Craig Haw
Economic Loss of sales tax revenues , as no new development with retail aspects . Loss of property tax
revenues to County. Have you asked their opinions on this? Will drop property values , as per
Commercial Realtors and appraisers , by approximately 50% for properties not at their highest and
best uses . - Sean Dougherty
Economic Severe economic impact lower revenue and tax base lower employment negatively affects many
property owners and business owners. Long term impacts of flooding are vastly overblown and
exaggerated . Frequency of flooding is very low. This is an expensive costly solution in search of a
real problem .
Economic Efforts and investment does not justify the reduction in risk; big waste of time and tax payers dollars.
Private property rights ignored ; property devaluation potential unjustified . Long term economic
impact is negative and could jeopardize future tax dollars to the city, not to mention
redevelopment/development that may occur that could potentially enhance the social , environmental
and economic well-being of our City's future . - J . Crawmer
social Concerned that public utilities will be hampered from future expenses (sewer plants) impacting our
ability to treat wastewater. Should be based on demonstrated site specific study. - Steve Kawulok
Economic Property rights and values are subject to degradation of value. The resulting lawsuit will be costly to
the City. Over riding FEMAi and State floodplain regulations is an unnecessary burden on properties
only solidifies the publics perception that this town is run by a bunch of do gooder-anti growth-anti
business-elitists . - Charlie Meserlian
social 1 % risk is not enough for this level of regulation. This is causing a disconnect between old town and
North College . - Peter Kast
Economic Restricting development. Taking of land without compensation . Use open space money to take this
land . Use open space money allows the community to share in the loss or cost of this action .
Economic Supports delayed implementation of increased regulations . - Ed Zdenek
Economic Understand about not wanting to have water pushed off on other properties . However, as an
investor, he feels the regulations are a condemnation . - L and M Enterprises LLC
Economic Concerned about what this is going to do to others. In the past, have had a bad experience with City
buying out a property in Old Town and offering low value . - James Wade
Economic May want to sell property in future and therefore do not want property to be devalued by further
floodplain regulations. Does not want development to be stopped completely. Karen Livingston
Economic Concerned about Council adopting 0. 1 ft floodway when mapping not updated . - Kim Zidon
Page 2 of 3
2of13
Poudre FloodplainRegulations
CommunityPublic Comments
• and IndividualComments
Category
Affected
Economic Concerned about either option 1 or 2 , because it would have a significant negative impact on their
property. - State Board of Land Commissioners
Would like no changes to the regulations . - Dixie Gibbens
Economic I vote emphatically for option #3 . 1 am sick and tired of the 4 no-growthers on this city council finding
any way they can to stop development and growth in Fort Collins . They don't care what individuals or
businesses suffer or if they go out of business because of their actions . How do they think we got
where we are today? - David Austin
Economic Do you know if any Cities similar to ours (such as Pueblo or Steamboat Springs) have data
documenting the economic impact of a well-designed urban river corridor?
-Historic Arkansas Riverwalk of Pueblo ( HARP), http://www. puebloharp .com/
-River Walk, Steamboat Springs , http ://www.steamboatunbridled .com/townAndValleyProjects.aspx .
The Poudre River between the new Discovery Science Museum and Lemay is not " natural , " and will
never be restored as such . It's time to stop pretending and hiding behind environmental issues ; and
most recently, flood safety scare tactics . The stretches of the Poudre further west, or east near
Timberline and Prospect Ponds have been well protected and preserved as a great open space
community asset. However, we are kidding ourselves if we think the downtown reach should be
treated similarly.
Furthermore , we are losing a tremendously opportunity if we prohibit creative development along the
Poudre River in the name of riparian stewardship and public safety. . . what a fallacy? ! Other cities
that have created successful river walks have overcome the same engineering challenges and
federal requirements ( FEMA, Army Corps of Engineers , etc. ) . . . the only difference is that they had
the political moxie to make it happen . Not only could this be a remarkable economic and cultural
boon for Fort Collins, but an active and engaged river corridor through downtown could actually
boost environmental stewardship as well .
As it stands , the Poudre River near Old Town is the " back-of-house" to aged industrial lots and other
businesses . This neglected stream is too often ignored or even unknown to many citizens and
visitors . Once the masses realize what a great resource we have through their impressive
downtown river experience , they will likely become advocates for the greater Poudre River. I
appreciate the work your department has done thus far to ensure a balanced picture is presented to
City Council . - Nick Haws, PE , Northern Engineering
Save the Poudre (See attached letter)
Water Board Chairperson , Gina Janett (See attached letter)
Natural Resources Advisory Board (See attached letter)
Page 3 of 3
3 of 13
Poudre River Floodplain • •
Property
Date of meeting Issues Discussed
11 /2/10 HANNA, JOHN H : He is in the County and plans to sell property. New owner is expected to do
residential . He has spoken with Ed Woodward at the County about County regulations and
possible variances to freeboard requirements . We explained reason for notification from City
was related to possible future annexation . I explained that 0 . 1 ft floodway mapping was not done
in this area , and would be redone if Option # 1 is the option picked by Council . He would have
liked more detailed information to be included about the basis for the flows (gage at month of
canyon ), how the hydraulic models work and specific elevations on his property. He had no
specific comments on the proposed regulation changes .
8/30/10 Ed Zdenek
9/9/ 10 Neenean — Advanced Energy property
10/6/10 Old Town North
11 /8/ 10 ARNETT, ROBERT W : MHR and SDH - Spoke with Stan Arnett (grandson ) about the proposed
regulations . Explained that County regulations are what guide them for current development.
We were informing them in case they were annexed in the future . Explained that 0 . 1 ft floodway
was not shown on their map because 0 . 1 foot needs to be updated . SDH also discussed West
Vine floodplain and Master Plan outfall that needs to come through this property in the future (5
years or more out) . City will work with property owner on location of outfall channel .
11 /9/10 LIVINGSTON , KARIN A: We discussed the regulation options , variances , map amendments
and revisions . Discussed the Shields bridge reconstruction . Property is currently a horse stable
in the County. However, she may want to sell in future and therefore does not want property to
be devalued by further floodplain regulations . She does not want development to be stopped
completely and therefore she does not like Option #2 . She feels it is important to achieve a
balance between property owner rights and rights of the community. She felt the City did a good
job of informing property owners of the issue and appreciates the communication .
11 /22/10 FORT COLLINS RETAIL NURSERY INC : MHR - Met with Gary Eastman and Jesse Eastman .
Discussed the property and City regulation options . Currently in the County. Discussed
remodels and ways to protect hoop houses from floating downstream .
11 /23/10 LINK-N -GREENS , INC : Meeting with future developers of Link-N-Greens Site . Those present at
the meeting were Allen Ginsborg , Rich Shannon , Brad Anderson , Bruce Hendee , Marsha Hilmes
Robinson , Ken Sampley, Jon Haukaas , Brian Varrella . The following were discussed :
floodplain mapping , ways to change the map - LOMA, LOMR with hydraulic modeling , FEMA
process , possible need to go to County Flood Review Board is modeling extends into county as
part of LOMR, variances , importance of protecting buildings in 500-year floodplain even if not
required to elevate , filling in floodplain pushes water off on someone else , approval process for
permits and LOMRs , current regulations , proposed regulations under Option 1 and Option 2 .
Page 1 of 2
4 of 13
Poudre River Floodplain • I
Property Owner Meetings
Date of meeting Issues Discussed
11 /29/10 INSITU INC : MHR met with Chris McKee and Craig from InSitu about their future addition . The
future addition was shown on the original development plans . It was shown to be in the 100-
year flood fringe but out of the 0 . 1 foot floodway. They are not concerned about option #1
because their building would be out of the 0 . 1 ft flooday. They are concerned about option #2 .
They feel this was negotiated when they moved the company to Fort Collins in 2003 so the
future expansion should be allowed . They understood about not impacting their neighbor. We
discussed other options they may have if Option #2 were adopted : 1 . Change the addition
footprint to be out of the 100-year floodplain ; 2 . Do hydraulic modeling to show how some of the
work they have already done have created more capacity and therefore the floodplain line could
be adjusted through a LOMR and thus allow the addition to be constructed . They plan to voice
their concerns . Their main priority is allowin g future construction of the addition .
12/6/ 10 BIRCHETTE , CARLEEN M/MICHAEL D : MHR met with Mike Birchette . Discussed that this
property is currently in the County and these changes would only be applied if the property was
annexed . Discussed the FEMA/County remapping in 2006 . Discussed regulations as they
apply to residential structures . Discussed variance process . Discussed No Adverse Impact. He
was concerned about others being allowed to flood his existing structures . Suggested he talk
with County about Shields Street bridge replacement. He will fill out comment form and return it
to us .
12/6/10 Alden Hill
Page 2 of 2
5 of 13
Natural Resources
City of 215 Mason
a Boo x 580
Fort
6rt Collins FortCollins, 80521
970.221 -6600
970.224-6177 - fax
fcgov.com
MEMORANDUM
FROM THE CITY OF FORT COLLINS
NATURAL RESOURCES ADVISORY BAORD
Date : December 15 , 2010
To : Mayor and Council Members
From: Liz Pruessner on behalf of the Natural Resources Advisory Board
Subject: Poudre River Floodplain Regulations
The NRAB , fulfilling its role to evaluate matters pertaining to natural resources and
environmental protection and management issues of concern to the City has listened carefully to
Stormwater staffs presentation regarding the options they considered and their recommendation
for limiting development within the Poudre River's 100-year floodplain. The options are : ( 1 )
The Poudre River floodplain regulations be revised to adopt a 0. 1 foot rise floodway; (2) The
Poudre River floodplain regulations be revised to not allow any structures in the 100-year
floodplain; (3 ) No change to the Poudre River floodplain regulations (null alternative) ; and a No
Adverse Impact possibility.
Building in the floodplain is not in the best long-term ecological interest of the Poudre River, one
of our region's key environmental features, because it may:
(a) significantly disturb the native or semi-natural river corridor's habitat,
(b) interfere with the river's ability to migrate within its floodplain,
(c) isolate one portion of the corridor from another via constrictions or other
encroachments, and/or
(d) be a source of hazardous materials or other damage-causing debris.
On the other hand, we recognize that some areas within the river's 100-year floodplain are
already considerably developed and have little or no current environmental value, Fortunately,
there are administrative ways to mitigate any hardship that may be associated with continued
occupancy and further improvement of these parcels.
We recognize too that the chosen floodplain regulation may have far-reaching consequences in
terms of human safety, protection of or encroachment on private property rights, and public
liability and expenditures for reasonably foreseeable floods. Fortunately, eliminating 100-year
floodplain encroachment may serve well to minimize negative consequences in all of these areas,
bolstering the City's Triple Bottom Line accounting. We look forward to seeing the economic
analysis of each of these options.
Options 1 and 3 do not offer the full level of protection afforded by Option 2, and the "No
adverse impact " option, though showing potential for the future, needs an operational definition.
Page 1 of 2
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�Fort Collins
In addition, Option 1 would require considerable expenditure of public funds, estimated to be as
much as $250,000 for mapping, which would be unnecessary if Option 2 were adopted.
Finally, the NRAB notes that flooding is a natural and inevitable phenomenon, with restorative
benefits to both the river and riparian ecosystems. The wisest course of action is to let the river
do what it does best without interference. Time and again, rivers show their enormous power to
foil man's best efforts to control them.
Accordingly, the NRAB recommends (on a 6 to 1 vote) that Council adopt staff Option 2 — No
New Structures in the 100-year Floodplain.
Please feel free to contact me regarding the NRAB ' s comments on this issue.
Respectfully Submitted,
Liz Pruessner, Chair
Natural Resources Advisory Board
cc : Darin Atteberry, City Manager
John Stokes, Director, Natural Resources Dept.
Susie Gordon, Staff Liaison
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Utilities Water Board
City of 7oo Wood
80
PO Box 5H0
Fort Collins 9702216702
702 s7 2167l Collim 2 E
,. . - .. s7o o2
970 A 16 220H f i
Mgov cone
MEMORANDUM
DATE: August 20, 2010
TO: Mayor Doug Hutchinson and City Councilmembers
FROM : Gina C. .la nclt, Water Board Chairperson
CC: Brian Janonis, Utilities Executive Director
RE: Water Board Reconmundations concerning Floodplain Regulations
The Water Board appreciates the opportunity to review and comment on the proposed Floodplain
Regulations as recommended by staff. Below is a summary of the public comment and discussion at the
8/ 19/ 10 Water Board meeting along with our recommendation .
Public Comment
The Water Board rarely receives public comment ut our meetings and we were happy to see the interest in
the Floodplain Regulations item. Approximately 20 people attended the mceling including representatives
from the Board of Realtors, Homebuilder' s Association , the Hol'fman lamily ( who own the land at Link N
Greens) and developer representatives Rich Shannon and Bruce Hendee.
About seven people spoke to the Board . The majority of* comments were concerns about the impacts that
new, more stringent I1exldplain regulations might have on individual property owners and the polential
economic losses that would result for their properties from the new rules . It was requested that the
problem necessitating new regulation be fully described and documented with data . It was asked whether
this rule would later be applied to the other drainage basins in the city or only be applicable to the Poudre
River Iloodplain . The Hoffman family indicated their property had not flooded near their barn during the
1864 and 1904 floods and that any further restrictions for developing in the Iloodplain would make their
property "worthless and undevelopable". Ed Zdenick commented on his current negotiations with the
city for right of way fora property that is getting ready to be developed and wondered what impact the
rules would have on that negotiation.
The Water Board chair indicated to the audience that the Water Board is advisory to City Council and no
decisions would be made by the board, just recommendations. I also encouraged them to attend or watch
the 8/24 City Council Work Session and stated that there was likely to be more public outreach on this
issue before any Council action .
Water Board Discussion and Recommendation
Marsha Hilmes-Robinson gave a presentation covering the current regulations and the three proposed
options which were: 1 . Change the Flood rise rule from .5 feet to . I feet, 2. Prohibit new structures in the
100 year Floodplain, or 3 . Keep the rules as they are now.
She reviewed the history of the Floodplain rules and their changes since 2000 including the 2007
amendments which were designed to make the city and county regulations the same, but which made the
city' s rules less stringent and the county' s rules more stringent.
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City of
F6rt Col
lit"1S
[ it response to qµieslions from the Board, Marsha indicated that flood insurance is typically mandated by
lenders Kit properly has a mortgage or loan, but that if* lite properly is paid for in cash or the morlgall is r
fully paid off, there is no other mandate to have flood insurance . She inlormed us about the city ' % "willing
buyer/willing seller" program that allows the city to purchase properties when the seller wants to sell ( if
funding is availahle ). Finally, staff also reviewed the status o1' similar or diIlerent regulations of other
cities in Colorado and other slates around the country which are either more or less stringenl . Staff also
lalked about the current approach of ' Du No I larm" from the Associalion of Slale F000dplain Managers.
This approach says that Iloodplain development should not impact other property owners . Finally,
Marsha indicated that across the country floods are causing increasing properly and economic damages.
The Water Board members discussed the dillicully in Irying to measure economic impacts to land owners
who could not develop all of* their properly and to adjacent or downstream properties impacted from
flooding caused by Iloodpfain fill and development. It was mentioned that the triple hotlum line approach
includes social , environmental and economic goals and lhal the balancing between these values isn ' I
always easy. The Water Board tries to weigh llte rights of individual property owners to develop their
properties versus the rights of other property owners to not incur costs from floudplain development .
Comments were made that when structures are in the floudplain and get washed away in a flood, they can
block or damage bridges and roads and increase the flooding of downstream properties . II was mentioned
that floudplain regulations are adopted to protect the public ' % health and safety and to protect private
property and businesses. Finally, comments were made about the public costs of floods in terms ol' city
lire, police, ambulance, and landfill expenses for rescue and clean-up.
Upon completion of* the discussion, David Pillard moved that the Board recommend Option #2 to City
Council to prohibit structures in the 100 year floudplain . The motion was seconded by Mike Connor.
Duncan Eccleston recommended a friendly amendment suggesting the motion include the
recommendation fur more public outreach and the notion was amended to endorse the staff
recommendation, specifically:
The Woler Board snplmrls the sla//' rc•c•ormnendation to not allot, net, structures in the Ponch•e
Rirrr / 00- ►�cmr,lloodpluin ( Option#2 ) mul recommends to Ofv Council thm sKij' crontillne frith
public ornrcmch converning changingChupner l0 g1* Cif ►' Coda to not lallotr nens slruc•tures in the
Pondt-e Ritter./loodplain.
The vote on the notion passed 5 to 2 . Board members Phil Phelan and Steve Balderson voted no and
expressed the view that they had supported the regulation changes in 2007 and did not see a reason to
change them again .
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('ouncil to hull in resources from other departments who could further analyse some
aspects of this decision .
Hoard Member Brown feels it is risky and the public all incurs costs from putting
structures in the floodplain . There are other pieces of the Triple Bottom Line to weigh in
on .
Chairperson Janell will support the motion , noting her understanding that it ' s a cost to
someone who wants to make the most economic use of their property . When agreeing to
allow fill in the floodplain , the water goes somewhere else, and a neighbor who is
impacted is nol compensated for the damages . It also impacts infrastructure such as
bridges and streets , the community ' s ability to travel , and safely response by fire and
police . It ' s a balancing act 1b1' how best to protect a%Pecls such as life safety and
infrastructure .
Vote on the motion by roll call :
Pillard - Aye
Connor Aye
Eccicston Aye
Phelan — Nay
Balderson — Nay
Janett Aye
Brown — Aye
Motion passes with 5 for, 2 against . (The reasons for nay votes by Vice Chairperson
Balderson and Board Member Phelan are noted (above ).
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Follow us on Facobook ID
SavethePoudre . org
Poudre if'afcrkrcper
r. A V Ethe P419 U
TY
y `
1
s
August 16, 2010
To : City of Fort Collins and other interested parties
From : Save the Poudre : Poudre Waterkeeper
RE : Qualified support for staff' s recommendation to not allow new structures in the Cache la
Poudre River' s 100-year floodplain
"An ounce of prevention is worth a pound of cure. " — Benjamin Franklin
Dear City of Fort Collins,
We thank City Council, Stormwater Staff and the Water Board for initiating a valuable
' repurposing' of the Stormwater Utility's objectives, and we thank staff for inviting our
organization to comment on one element of that repurposing, a proposed change in the
floodplain regulations to minimize or disallow new structures in the Poudre River's 100-year
floodplain . This letter describes our "qualified" support for the staff recommendation, Option
#2 . Following the City 's Triple Bottom Line evaluation framework, Option #2 will prove least
expensive for ratepayers and the City, and most beneficial for the city's greater community
vision as well as the environment . Option #2 is the only option that is fundamentally fair to all
floodplain property owners because it minimizes economic and environmental damage all
along the floodplain corridor.
First, floodplains play an extraordinary positive role in protecting rivers, riparian ecosystems,
human health and safety, and in local economies . Hard structural development in floodplains
unavoidably leads to a host of negative effects, all of which have occurred — and are occurring
— locally along the Poudre River including:
1
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o Unnaturally high water elevations upstream leading to excess flooding, property
damage, and potential human safety issues,
o Unnaturally erosive velocities downstream leading to streambank destabilization , excess
sedimentation, and habitat destruction for fish and other aquatic species,
o Threats to local businesses along the floodplain both upstream and downstream from
development,
o Destruction of riparian and critical wetland habitats .
Second, the U .S. Army Corps of Engineers, Denver Regulatory Office has issued stringent
guidance on development in floodplains along the Front Range of Colorado. Specifically, that
guidance ( https ://www : nwo . usace . army . mil/html/od-tl/floodplains . dro-guidance .9 - lun -06 . pdf)
states :
Floodplains possess significant natural values and carry out numerous functions
important to the public interest. These include water resources values ( natural
moderation of floods, water quality maintenance, and groundwater recharge ), living
resource values (fish, wildlife, and plant resources), cultural resource values ( open
space , natural beauty, scientific study, outdoor education, and recreation ) and
cultivated resource values (agriculture , aquaculture, and forestry) .
The Denver Regulatory Office ( DRO), after analyzing numerous project authorizations
and recent permit applications, has determined that an unacceptable cumulative
degradation of floodplain functions and values is occurring along the Colorado Front
Range. This cumulative degradation of floodplains is occurring due to the Front Range' s
rapid population growth , coupled with associated floodplain development pressures .
The DRO has seen a recent increase in the number of permit applications where
applicants propose maximization of developable lands . A substantial component of this
maximization occurs with proposed floodplain modifications that reduce the size,
functions and values of the floodplain . ...
. .. due to unacceptable cumulative floodplain impacts, the following clarifying guidance
is provided regarding Individual Permit applications where floodplain development is
proposed : .. .
If a practicable alternative exists for construction of a project outside of the floodplain ,
this is the alternative for which a permit should be sought. For proiects where filling of
an existing 100-year floodplain is proposed in order to increase developable land , it is
doubtful a permit will be issued . (emphasis added )
Third , the Association of State Floodplain Managers ( http : //www . Floods . org ) has documented
that U . S. flood damage has increased six-fold from the 1900s to 2007, now averaging over $6
billion annually ( not including hurricanes ) . This has occurred despite investing billions of dollars
in structural and non -structural measures . Unfortunately, decisions made in the past about
developing in floodplains continue to cause serious consequences in the present. Though those
2
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decisions were made with little regard for how they affected property in the floodplain , rising
costs and a growing appreciation for the equity issues involved — after flood damage has
occurred — have clearly shown that those past decisions are economically unsustainable .
Additionally, by allowing one developer to encroach on the floodplain , the profits for that
developer are privatized, but the costs to other landowners and the community are socialized ,
which is unfair and bad public policy.
Given the damage created by local floodplain development, the regionally cumulative threats
to floodplains along the Cache la Poudre River, and the unsustainability of the economic
consequences of past decisions, Save the Poudre : Poudre Waterkeeper supports the total
restriction of hard structures within the Poudre's 100-year floodplain . Benjamin Franklin was
right : "An ounce of prevention is worth a pound of cure ."
Additionally, we also request that the City understand that there is an unacceptable loophole in
the proposed rule revision with regards to parking lots which would be classified and allowed as
a non -structural ' element within the 100-year floodplain . This unacceptable loophole is why
our support for Option #2 is "qualified ." Lining the river with parking lots does not match any
acceptable vision for the Poudre River — such lining has already begun to occur. The City should
not allow the river to be lined with parking lots — as a community, we need to turn and face the
river to appreciate the economic opportunity and ecological life that it provides to the City, not
treat it as a parking lot .
The non - human world — nature, and the Poudre River here in Fort Collins — have no voice in our
public and political processes other than what we humans give them . Save the Poudre is
honored to help create a voice for a healthy Poudre River in northern Colorado, including its
floodplains . We look forward to engaging with a broad public process that helps meet our
mission to protect and restore the Poudre River for future generations .
Thank you for considering our position .
Respectfully,
qI
Gary Wockner, PhD, Director
Save the Poudre : Poudre Waterkeeper
SaveThePoudre . org, 970-218-8310
gary.wockner@savethepoudre . org
3
13 of 13
ATTACHMENT 7
Utilities Executive Director
City O� electric . stormwater , wastewater. water
Fort Collins Wood
PO Box 580 For
Fort Collins,,
CO 80522
970.221 .6702
970.416.2208
970.224.6003 TDD
utilities@fcpov.com
fcgov.com/utilities
MEMORANDUM
Date : August 26, 2010
To : Mayor Hutchinson and City Council members
Through: Darin Atteberry, City Manager
Brian Janonis, Utilities Executive Director
From: Jon Haukaas, Water Engineering and Field Services Manager
Reference: August 24, 2010 Work Session Summary — Floodplain Regulations
Jon Haukaas, Water Engineering and Field Services Manager and Marsha Hilmes-Robinson,
Floodplain Administrator, presented Council with a brief overview of the work done to date on
the Poudre Floodplain Regulations. Council members present included Mayor Doug
Hutchinson, Mayor Pro Tem Kelly Ohlson, Ben Manvel, David Roy, Wade Troxell, and Aislinn
Kottwitz.
Staff began with the interrelationship between this effort and Plan Fort Collins. It was
recognized that the Poudre River is key to the sustainability of Fort Collins. There was
discussion indicating that Plan Fort Collins is a long range vision while revisions to the Poudre
River Floodplain Regulations are immediate considerations .
The staff presentation reviewed the three options of proposed levels of floodplain regulation.
( 1 ) Return to a 0. 1 foot allowable floodway rise limitation, or (2) implement a restriction on new
and expanded structures within the floodplain, or (3 ) maintain the current regulations.
Next staff explained why this item was being discussed, mainly its relation to the Stormwater
Repurposing efforts and also its relevance to the Plan Fort Collins discussion. Information
regarding the number of parcels, acreage of parcels, and maps showing specific areas of concern
under the various options was discussed. A significant portion of the remaining discussion
included clarification of the concepts associated with floodplains and the effect of fill or other
forms of development.
Key discussion and feedback by Council:
1 . Public Outreach Process to explain the range of options considered for proposed changes to
the Floodplain Regulations.
In general, the Council felt that a significant amount of outreach needed to happen and more
should have occurred prior to this discussion. Staff reiterated that the work session serves as
1 of 2
� of
t Collins
a process check before time and resources are utilized to move forward and that this work
session would serve as the beginning of a substantive outreach process.
Outreach efforts envisioned would include Boards and Commissions, City departments,
stakeholders (i.e. impacted property owners, business associations, interested citizens), and
the general public. Parcel-specific information is currently being developed to identify
impact to individual property owners as the next step.
2 . Preference on Options for Regulating the Floodplain
Council did not feel they had sufficient public feedback to have a preferred option at this
time. They were also concerned about these regulations being applied only to the Poudre
River Floodplain. Council discussed the need to look for additional options beyond the three
currently under consideration, including those related to the "No Adverse Impact" approach
that is gaining support nationally.
Council expressed a range of comments and feedback. This included:
• The concern that the recommendations to strengthen the regulations were not justified
and that they would adversely affect the economic health and viability of Fort Collins.
The Downtown River District is a key area of development for the City and
coordinated development approach along the river would be the prudent approach.
• That there needs to be a balance between the economic, social and environmental
considerations for the river.
• Fort Collins needs to stop building where it is likely to flood. "Let the river be a
river. " In accordance with the City Plan, we are to protect and restore the natural
functions of the river.
• The "river is a workhorse," and the community "should use it more as a playground,
not a plaything."
• That riparian edge development should be the exception, not the rule, and that 50 to
100 years from now a natural Poudre River would be the greatest community attribute
in Fort Collins.
3 . Comments to be added to the Triple Bottom Line (TBL) Analysis Map
Time did not allow an in depth discussion of the TBL chart. One Council member did not
feel this chart format was easy to use and that it needs to be better organized. Staff
concluded with a brief explanation of how comments would be added to the Map.
Three Council members supported continuing the discussion while two felt the need was not
sufficiently expressed to warrant continuing the process.
Specific direction was also provided to Staff to be prepared to address the following questions :
1 . What is the purpose and need to change the floodplain regulations?
2 . Analyze the impact on properties in more detail.
3 . Provide more economic analysis .
4. Describe better "Less people at risk" - how many?
5 . Provide more information on "No Adverse Impact" to the public and to the Council.
2
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ATTACHMENT 9
Final Report
TheE'co.1otnics of bind Use Proposed Floodplain Regulations
Economic Impact Analysis
awk
Prepared for :
City of Fort Collins
Prepared by :
Economic & Planning Systems , Inc .
Economic & Planning Systems, Inc. January 6 , 2011
730 17th Street, Suite 630
Denver, CO 80202-3511
303 623 3557 tel
303 623 9049 fax
Berkeley
Sacramento EPS # 20889
Denver
www.epsys. com
Table of Contents
1 . INTRODUCTION AND SUMMARY OF FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scopeof Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Summaryof Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 , PROPERTY IMPACTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
AreaAnalysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Estimated Development Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Development Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Property and Sales Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Non -Area Parcel Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3 , NCURA AND DDA IMPACTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Development Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Property and Sales Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 , INDIRECT AND INDUCED IMPACTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
One -Time Construction Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Annual Ongoing Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5 , OTHER CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
PolicyOptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
14PPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
List of Tables
Table 1 Summary Estimated Impact Results , . . . . . . . 6
Table 2 Existing Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3 Estimated Impacted Acres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4 Estimated Area Development Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 5 Estimated Area Development Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 6 Estimated Area Annual Property Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 7 Estimated Area Annual Sales Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 8 Area Total Annual Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 9 Non - area Parcels Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 10 TIF Area Estimated Development Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 11 TIF Area Estimated Property Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 12 TIF Area Estimated Sales Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 13 TIF Area Estimated Total Tax Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 14 One -Time Estimated Construction Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 15 Estimated Annual Ongoing Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
1 . INTRODUCTION AND SUMMARY OF FINDINGS
Background
The City of Fort Collins Department of Utilities has proposed modifications to the City 's current
floodplain regulations that would potentially create barriers to the renovation , expansion , or
construction of development uses on some properties in the future . The City has requested EPS
conduct an economic impact analysis to estimate the magnitude of the impacts on parcels
affected by the potential floodplain regulation changes .
The City 's existing regulations prohibit all structures within the current floodway ( 0 . 5 foot rise ) ,
residential structures within the 100 - year floodplain , and critical facilities within the 500 - year
floodplain . The Utilities Department conducted an evaluation of the existing standards and
identified three options that have been under discussion with the City Council and the general
public since August :
1 . Redefining the floodway definition to a 1/ 10 foot rise , or
2 . No structures within the 100 -year floodplain , or
3 . No changes to current regulations .
A potential Option 4 " No Adverse Impact" is now under discussion , but is still being defined . It
would essentially identify a way to evaluate potential flood - related impacts of proposed
developments in the floodplain and allow for a range of mitigation measures to remove or lessen
the impact of the local regulatory limits on affected properties . This option could materially
affect the overall and localized impacts of the new regulations , but is not evaluated in the
economic impact analysis at this time as it is still being formulated .
The City Water Board has recommended the second option above , which would affect the greatest
number of land parcels . Currently , nonresidential structures are permitted in the 100 - year
floodplain provided they are sufficiently elevated and flood proofed . The proposed regulations
would prohibit new buildings or expansion of existing structures within the 100 -year floodplain
boundary . The City identified four geographic areas within the floodplain that are expected to
have the greatest potential for new development for the purpose of this analysis as follows :
Area 1 - A portion of the North College Urban Renewal Area north of the downtown area .
Area 2 - The area south and west of the intersection of Lincoln and Lemay and north of the
Poudre River .
Area 3 - An area east of Lemay Avenue and south of Mulberry Street .
Area 4 - An area west of the Poudre River to the north and south of East Prospect Avenue .
This economic impact analysis ( EIA) evaluates the potential impacts of the proposed regulations
on future development in the above - described areas . The parcels are GIS coded to determine the
amount of the site in the floodplain , the current floodway and the proposed new floodway ( under
Option 1 ) . For the purpose of this general analysis, the parcels have been grouped by ownership
and/or by logical development area boundaries based on estimated future development or
redevelopment potentials, thus optimizing development potential by aggregating parcels as
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indicated . The future development potentials have been identified considering the following
factors : the viability of existing uses ; existing zoning and approved development plans ; property
owner and developer inputs ; City Plan and applicable subarea plan future land use
recommendations ; and overall market forecasts and constraints .
EPS ' assessment of future development potentials is first estimated under existing regulations .
The impact of the two potential regulatory changes on development potential is estimated based
on the reduction in buildable land and its impact on development potential of the affected parcels
and/ or ownerships . If the current mapping shows that a portion of the development area is
within either the Floodway ( Option 1 ) or the Floodplain ( Option 2 ) the amount of development
has been estimated to be reduced proportionately based on the reduction in land area available
for development for the most likely future development uses forecasted and applicable density
levels estimated by floor area ratio ( FAR) for commercial uses or units per acre for residential uses .
The assessment of future development potentials is a planning level estimate for
overall future buildout in the affected areas over an extended timeframe of up to 50
years . It is therefore an estimate of highest and best use within the areas analyzed
and not a current appraisal of value or individualized impacts given the current or
future regulatory scenario nor is it constrained by current parcel sizes and
configurations . The estimated development potential may or may not be practicable,
desirable or realized and the actual time period required for full development at the
level described to be realized could be shorter or longer . The figures are therefore
designed to estimate the overall impact on future development potential of the
proposed regulatory changes compared to current regulations . EPS has not conducted
any project specific market forecasts and is therefore not able to provide estimates of
development by time period . Current market values are applied by land use category
to estimate development values, and potential tax losses . No actual determination of
value for identified development areas, ownerships, or individual parcels has been
made or is either offered or implied .
The actual value of any parcels or sites cannot be determined without more extensive
appraisal work and will depend on multiple factors, including but not limited to : the
size of the parcel , shape, access, visibility, the willingness to sell ; the quality and
viability of existing uses, occupancy levels, and / or net operating incomes; and larger
economic and market conditions present at the time of sale . Similarly, the actual
impacts of the regulatory changes on each parcel will be dependent upon the particular
circumstances and any development and flood mitigation approaches employed .
In limited cases, EPS' analysis has postulated that the extent of the floodway or
floodplain regulatory change would make new development or redevelopment unlikely.
In these instances, for the purpose of this analysis, the existing land uses have been
treated as continuing as " grandfathered " uses, and vacant properties have been
treated as remaining undeveloped . The lack of development potential represented for
this analysis does not indicate that the property has no value . Individualized
scenarios that could serve to maximize value on these parcels, such as sale to an
adjacent property owner to achieve the combined potential of a larger site and / or
floodplain mitigation measures to reduce the area of floodway or floodplain impacts,
have not been considered or taken into account in this analysis .
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The potential loss of development market value , assessed value , and annual property and sales
taxes are estimated for the four identified high potential areas in the floodplain and for the
portions of the floodplain areas located in the North College Urban Renewal Area and the
Downtown Development Authority Area . There are also other parcels in the floodplain upstream
and downstream of the four study areas for which the total acreage affected is summarized .
These parcels were evaluated on a more cursory level by tabulating the total number parcels ,
acreage , existing development, and impacted areas .
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Scope of Work
EPS conducted this economic impact analysis of the regulatory options to make a determination
of relative impact . The following major tasks were completed in the course of the one month long
study .
• GIS Analysis - EPS reviewed the proposed floodplain policies and the development areas in
the floodplain , obtained the affected property parcel database and aerial photography,
identified the affected properties , and overlaid the floodplain changes on the County Assessor
parcel level data .
• Field Reconnaissance - EPS conducted a field inventory and reconnaissance of parcels and
ownerships in the four identified study areas to compare existing conditions to existing
zoning and approved development plans . The relationship between the affected development
parcels and surrounding land uses was noted for consideration in identifying future land use
and applying market values .
• Stakeholder Contacts - EPS conducted two days of meetings with affected property
owners , developers and business associations in the four identified areas to review the
existing developments , ODPs, and other development plans , and to identify and discuss the
impacts of the proposed regulations on their properties .
• Development Impacts - EPS estimated the future development potential of the parcels and
ownerships in the floodplain under current regulations . The estimated reduction in square
feet of development potential under the proposed options was then estimated , assuming
optimized aggregation for future development and no mitigation improvements . The square
feet of commercial uses and the number of housing units was quantified based on ODPs,
existing zoning , future land use plans , and average density levels determined from
surrounding land uses and other pertinent market factors .
• Direct Economic Value - EPS estimated the economic value of the development parcels and
ownerships in the mapped floodplain in current ( 2010 ) dollars . Market values were
determined from previous market research , comparable sales , and developer inputs .
Assessed values were calculated based on average market values and current applicable
rates . The market and assessed value impact are meaningful in a relative but not absolute
basis . The absolute value of development would also consider development timing which has
not been addressed .
• Property and Sales Taxes - EPS estimated the annual property taxes associated with the
reductions in estimated development value at buildout for each development ownership and
subarea analyzed in the floodplain . Annual forgone sales taxes are also estimated for retail/
commercial properties . The loss of potential TIF revenues was quantified for the North
College Urban Renewal Area ( NCURA) and the Downtown Development Authority ( DDA) .
• Indirect and Induced Impacts - EPS estimated the related indirect and induced economic
impacts of the potential loss of economic activity to Larimer County for both one -time and
annual ongoing impacts based on multipliers from the IMPLAN input/output model .
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Summary of Findings
1 . Option 1 (O. 1 foot Floodway Expansion) would reduce the maximum development
potential for the affected parcels by approximately 13 percent compared to what is
allowed under current regulations.
The impact to estimated future development potential under this option for the four areas in
the floodplain that have been examined by EPS is approximately 352 , 000 square feet of
space , with $ 66 . 4 million of total development value in current dollars , as shown in Table 1 .
The change in City tax revenue for the four areas examined is estimated at $ 576 , 000
annually, including $ 144, 000 of annual property tax and $432 , 000 of annual sales tax .
Under this scenario , the one -time total economic impacts from construction for the four areas
examined are estimated to total a loss of $ 79 . 3 million , or 665 jobs . The annual ongoing
total economic impacts from commercial/ retail and office development for the four areas
examined is estimated at $ 138 . 5 million annually , or approximately 830 jobs .
2. Option 2 (No Development in 100- Year Floodplain) would reduce the maximum
development potential for the affected parcels by approximately 50 percent
compared to what is allowed under current regulations.
The impact to estimated future development potential for the four areas in the floodplain that
have been examined by EPS is approximately 1 . 4 million square feet of space , with $ 253
million of total development value in current dollars , as shown in Table 1 . The change in
City tax revenue for the four areas examined is estimated to total $ 2 . 5 million annually ,
including $470 , 000 of annual property tax and $ 2 . 0 million of annual sales tax . The one -
time total economic impacts from construction for the four areas examined are estimated to
total $ 303 . 4 million , or approximately 2 , 540 jobs . The annual ongoing total economic impact
from commercial/ retail and office development for the four areas examined is estimated to
total $ 644 . 9 million annually , or 3 , 760 jobs as shown in Table 1 .
3. The affected property owners may have the ability to design their development
plans and/or use floodplain mitigation improvements to reduce or eliminate the
impacts of the proposed floodway/floodplain regulations.
The proposed floodplain changes would affect individual parcels and ownerships differently .
Some parcels have only minor portions of the site affected by the floodway and/or floodplain
while others have large portions of the parcel that could be restricted from future development .
In some cases, the manner in which a development is designed and the type and extent of
floodplain mitigation measures employed will determine the level of development allowed
under the floodplain regulations . In addition , owners can reduce or eliminate the portion of a
parcel within the floodplain or floodway using map revision processes . The feasibility and
cost/ benefit of these engineered solutions require a more individualized evaluation and are
not within the scope of this analysis .
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Table 1
Summary Estimated Impact Results
Floodplain Economic Impact Analysis
Description No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
New New Diff. from No Change % Diff. New Diff. from No Change % Diff.
Development (Sq. Ft.) 2,7955098 25443,024 (3521074) -13% 1 ,430,365 (1 ,364,733) -49%
Market Value $488,946,678 $422,557,646 ($6613891032) -14% $235,465,863 ($253,480,815) -52%
Property Tax $7491369 $6051555 ($1435815) -19% $2781954 ($4705415) -63%
Sales Tax $2,637, 132 $2,205,344 ($431 .788) AQ6 643,910 ($ 1 ,993.222) -76%
Total Tax $3,386,501 $25810,899 ($575,602) .17% $922,864 ($294639637) -73%
Employment Impacts (Jobs)
One-Time Impacts
Direct 3,279 2,834 445 -14% 1 ,576 -12704 -52%
Indirect 688 594 -93 -14% 331 -357 -52%
Induced 929 803 -126 -14% 446 -483 -52%
Total 41896 41231 -665 -14% 21352 -21544 -52%
Annual Ongoing Impacts
Direct 41028 31468 -560 -14% 19501 -29527 -63%
Indirect 823 719 -103 -13% 348 -475 -58%
Induced 1172 1003 -169 -14% 414 -758 -65%
Total 6,023 5, 190 -833 -14% 2,263 -31760 -62%
Economic Output Impacts
One-Time Impacts
Direct $3917157,342 $3385046, 117 ($531111 ,225) -14% $ 1877932,690 ($2031224,652) -52%
Indirect $82,052,685 $705911 ,596 ($11 , 141 ,089) -14% $3%422,453 ($421630,232) -52%
Induced $ 110,779,280 $95,737,703 ($15,041 ,577) -14% $53,224,229 ($57,555,050) -52%
Total $583,9895306 $5045695,416 ($7992935891 ) -14% $280,5791372 ($3039409,934) -52%
Annual Ongoing Impacts
Direct $77%8041602 $6885158,658 ($9156452944) -12% 353,3821901 ($42654212701 ) -55%
Indirect $ 1951675,433 $ 173,5961075 ($2230795358) -11 % 92, 102,945 ($103,5725488) -53%
Induced $206,584,510 $ 181 ,792, 106 ($24,792,405) -12% 91 ,697, 143 ($114,887,368) -56%
Total $1 , 1821064,545 $ 1 ,043,5461839 ($13815171706) -12% $537, 1829989 ($64418811557) -55%
Source: City of Fort Collins; Economic & Planning Systems
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Limitations
The estimated overall economic impacts in the four areas analyzed represent a highest and best
use determination of future development over an extended time period . The total impacts may or
may not be realized due to multiple factors including the ability or interest of the property owners
to capitalize on the potential development opportunities . Future development could also take
place at lower ( or higher) densities than estimated which would affect the potential impacts
commensurately . In addition , changes to other regulatory and market conditions could have a
substantial impact on the validity of the estimated values and impacts in this analysis .
All economic impacts ( direct, indirect, and induced ) reported represent gross potential impacts ,
not " net new " impacts . If the development potential identified under each option is not built , a
portion of this projection of private construction ( office , retail , residential , etc . ) would likely occur
elsewhere in the City and surrounding area to meet regional demand . Only employment generated
from primary jobs ( new businesses and/or businesses relocating from outside of Larimer
County ) , destination retail uses not located in the region , and natural regional growth can be
considered net new .
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The IMPLAN model operates on the assumption that constant returns to scale exist . That is,
each unit of increase in employment results in the same unit increase in output and productivity .
The model also assumes there are no constraints on supply and demand . In other words ,
IMPLAN assumes that there is demand for each good or service produced . Output that is not
consumed locally within the study area is assumed to be exported , and local industries can
expand production to meet demand . Despite these limitations , IMPLAN remains the most precise
model for estimating Gross Economic Impacts .
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2 . PROPERTY IMPACTS
Area Analysis
Based on significant commercial frontages , surrounding uses , City plans , and estimated
development potential , the City identified four primary geographic areas within the floodplain in
which the overall potential for future economic development is the greatest . These areas are
listed below with a map of each area included in the Appendix .
• Area 1 - A portion of the North College Urban Renewal Area ( NCURA) north of the downtown
area at the intersection of North College Avenue and Vine Street . This area also features five
parcels on the south side of Hickory Street (Area 1A) included in the NCURA boundaries .
• Area 2 - An area at the southwest section of Lincoln and Lemay, including the Link- N - Green
Golf Course redevelopment parcels, several contiguous parcels to the west, one large parcel
on the north side of Lincoln , and impacted parcels along Linden Street near the intersection
of Buckingham Street . A majority of these parcels are included in the DDA boundaries .
• Area 3 - An area east of Lemay Avenue and south of Mulberry Street .
• Area 4 - An area west of the Poudre River along the north and south sides of East Prospect
Avenue , including a portion of WW Reynolds Office Park, Gateway Medical Clinic, and Neenan
Development offices .
A total of 305 acres of land parcels within these four areas would be affected by the proposed
change in regulations . These 305 acres contain 626 , 000 square feet of existing development,
representing an assessed value of almost $ 15 . 0 million as shown in Table 2 . In the projections
developed by EPS , total development square feet and assessed value is expected to change over
time based on future redevelopment, as some buildings are demolished for new larger buildings ,
while other structures remain in use as is .
Table 2
Existing Conditions
Floodplain Economic Impact Analysis
Description Acres Dev. Sq . Ft. Assessed Value
Area # 1 38 .4 95 ,210 $25027 , 850
Area # 2 135 .4 162 , 660 $39186 , 910
Area # 3 81 . 1 1449124 $39607 , 990
Area # 4 50 .4 2249405 $69115 , 930
Total 305 .3 626,399 $ 14,9389680
Source: City of Fort Collins; Economic & Planning Systems
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Methodology
EPS examined the County Assessor parcel data for the selected areas and identified a list of
subareas based on contiguous ownership and surrounding land uses . Each subarea is composed
of one or more parcels which are likely to be assembled and developed together or independently,
but with complementary uses . Area 1 features six subareas , Area 2 also features six subareas ,
Area 3 features seven subareas, and Area 4 features four subareas .
EPS compared the ( re ) development potential of each subarea to current regulations ( No Change)
under each of the proposed options, including :
• Option 1 - 1/ 10 foot Floodway Expansion , or
• Option 2 - No Development ( new buildings ) in the 100 -Year Floodplain .
Under existing regulations , no development of buildings is allowed in the 0 . 5 foot floodway ,
yielding just over 240 developable acres as shown in Table 3 . Under Option 1 , the floodway is
expanded to a 0 . 1 foot floodway, yielding just over 215 developable acres . Under Option 2 , no
development of buildings is allowed in the 100 - year floodplain , yielding 114 developable acres .
Table 3
Estimated Impacted Acres
Floodplain Economic Impact Analysis
Description Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-Year Floodplain
Acres Acres in Floodway % Impacted Net Acres in Floodway % Impacted Net Acres in Floodplain % Impacted Net
Area # 1 38.4 4.3 11 % 34.2 6.3 16% 32.1 29.0 76% 9.4
Area # 2 135.4 27.7 20% 107.7 41 .9 31 % 93.5 74.2 55% 61 .2
Area # 3 81 .1 17.3 21 % 63.8 25.9 32% 55.2 45.7 56% 35.4
Area # 4 50.4 15.6 31 % 34.8 15.6 31 % 34.8 42.1 83% 8.3
Total 305.3 64.8 21 % 240.5 89.6 29% 215.7 191 .0 63% 114.2
Source: City of Fort Collins; Economic & Planning Systems
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Future redevelopment potential for each subarea was estimated based on the viability of existing
uses ; existing zoning and approved development plans, property owner and developer inputs,
City Plan and applicable subarea land use plans ; and recent market forecasts and constraints . If
a small portion of the ownership/development area is lost to either the floodway ( Option 1 ) or is
in the floodplain ( Option 2 ) the magnitude of development is estimated by applying an estimated
generalized density factor, measured by floor area ratio ( FAR) for commercial uses or units per
acre for residential uses . In cases where a significant portion of the property is shown as within
the defined floodway ( Option 1 ) or within the defined floodplain ( Option 2 ) , and thus is likely to
have marginal buildable land remaining for the purpose of this analysis under either option , there
is assumed to be no change in development . In addition , where residential development was
identified for future use , density factors were only applied to areas outside of the 100 -year
floodplain as defined under current regulations . The development potential of each subarea was
summed to produce the total redevelopment potential for each area under each option and then
compared to current regulations to determine the net impact of each proposed option .
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Upon identifying each area 's estimated development capacity, EPS applied an estimate of market
value using a direct capitalization income approach , incorporating local market data and inputs .
The redeveloped market values of Options 1 and 2 were then compared to existing regulations to
determine the impact of the proposed options .
To identify the related impacts to City property tax revenue , EPS applied local assessment and tax
rates . To identify the related impacts to City sales tax revenue , EPS applied estimates of annual
sales to subareas identified for retail development and then applied the local sales tax rate .
Estimated Development Potential
Based on the outlined methodology, EPS identified total development potential of 2 . 8 million
square feet under current floodplain regulations across the four areas examined , as shown in
Table 4 . Redevelopment potential identified under Option 1 totals 2 . 4 million square feet, and
under Option 2 totals 1 . 4 million square feet . This level of development is expected to result in
an estimated $489 million of total future market value under current regulations , $423 million
under Option 1 , and $ 235 million under Option 2 .
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Table 4
Estimated Area Development Potential
Floodplain Economic Impact Analysis
Development Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Dev. Sq. Ft. Comm./Retail Office Residential Total Comm./Retail Office Residential Total Comm./Retail Office Residential Total
New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft.
Area # 1 38.4 95,210 151 ,306 113,502 0 264,807 127,648 1069983 0 234,631 91064 289513 0 37,578
Area # 2 135.4 1627660 164,976 411 , 174 11512,795 290885945 141 ,650 3543135 13322,022 1 ,8171806 82,025 2453307 8755283 192025615
Area # 3 81 . 1 144, 124 1049942 178,341 80,063 363,346 75,727 1569797 809063 3129687 0 1059110 80,063 185, 172
Area # 4 50.4 2247405 0 78,000 0 78,000 0 783000 0 78,000 0 0 0 0
Total 305.3 6269399 421 ,224 781 ,016 1 ,592,858 29795,098 345,025 695,915 114023085 21443,024 91 ,089 378,930 9559346 1 ,425,365
Market Value Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Dev. Sq. Ft. Comm./Retail Office Residential Total Comm./Retail Office Residential Total Comm./Retail Office Residential Total
New MV New MV New MV New MV New MV New MV New Sq. Ft. New MV New MV New MV New MV
Area # 1 38.4 957210 $31 ,8003324 $173217, 196 $0 $49,017,519 $2673593109 $16,5003144 $0 $42,859,253 $270843778 $4, 1863459 $0 $6,271 ,236
Area # 2 135.4 162,660 $37,3443490 $623026,637 $277,0703236 $376,4419362 $31 ,9793389 $53,3033035 $242, 128,638 $32794119061 $18,8653775 $353596A11 $160,3047887 $21497679073
Area # 3 81 . 1 144, 124 $24, 1361728 $9,9333515 $ 1338777554 $473947,796 $17,4171210 $5A521567 $133877554 $363747,331 $0 $0 $133877,554 $133877,554
Area # 4 50.4 224,405 $0 $1535403000 $0 $15,540,000 $0 $15,5403000 $0 $15,540,000 $0 $0 $0 $0
Total 305.3 626,399 $93,281 ,541 $1041717,347 $290,947,789 $488,946,678 $75,755,708 $901795,746 $256,006,192 $422,557,646 $20,950,552 $391782,870 $174,182,441 $234,915,863
Source: City of Fort Collins; Economic & Planning Systems
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Development Impacts
In order to identify the magnitude of impacts under each option , the estimated level of potential
development with no changes in regulation must be netted against the estimated potential
redeveloped market value of Options 1 and 2 . Under Option 1 , a total of 352 , 000 square feet of
estimated new potential development activity shown as unrealized , representing a general
current market value of $ 66 . 4 million , as shown in Table 5 . Under Option 2 , a total of 1 . 4
million square feet of new potential development would not be realized , representing a general
current market value of $ 253 . 5 million .
While development would likely occur over time , the development values shown represent
current market values . These values are not significant in the absolute as they do not consider
the impact of time , inflation or appreciation . The relative difference between alternatives is the
significant value with Option 1 ( 0 . 1 foot Floodway) representing an estimated overall reduction in
new market value of approximately 14 percent compared to projections under the current
regulations and Option 2 ( 100 -Year Floodplain ) representing a estimated overall reduction in new
market value of approximately 52 percent .
Table 5
Estimated Area Development Impacts
Floodplain Economic Impact Analysis
Development No Change- 0.5 Floodway Option 1 - 0. 1 Floodway Option 2- 100-year Floodplain
New Sq. Ft. New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
Area # 1 264,807 234,631 (30, 176) - 11 % 377578 (227,230) -86%
Area # 2 2,088,945 1 ,817,806 (271 , 139) - 13% 1 ,207,615 (881 , 330) -42%
Area # 3 363,346 312, 587 (50,759) - 14% 185, 172 ( 178, 173) -49%
Area # 4 78,000 78,000 0 0% 0 (78,000) - 100%
Total 21795,098 254435024 (352,074) -13% 1 ,4305365 ( 15364,733) -49%
Market Value No Change- 0.5 Floodway Option 1 - 0. 1 Floodway Option 2- 100-year Floodplain
New MV New MV Diff. from No Change % Diff. New MV Diff. from No Change % Diff.
Area # 1 $49,0175519 $42,8591253 ($6, 1581266) - 13% $6,271 ,236 ($42,746,283) -87%
Area # 2 $376,4415362 $327,4111061 ($49,0301301 ) - 13% $215,317,073 ($ 161 , 124,290) -43%
Area # 3 $47,9475796 $36,7471331 ($11 ,2001464) -23% $ 13,877,554 ($3410701242) -71 %
Area # 4 $15,5405000 $15,5401000 $0 0% $0 ($ 1515401000) - 100%
Total $488,9469678 $4221557,646 ($665389,032) -14% $23594655863 ($2531480,815) -52%
Source: City of Fort Collins; Economic & Planning Systems
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Property and Sales Tax Impacts
Based on the estimated reduction in future development potential that could result from the
proposed Options 1 and 2 , there would also be a related reduction in estimated property tax and
sales tax revenue to the City . EPS applied the applicable assessment and City mill rate of 9 . 79
mills to the market values to estimate annual property tax levels for each option at buildout
based on the estimated development potential . Based on current values, the City would collect
$ 144, 000 less in annual property tax revenue under Option 1 , and $470 , 000 less under Option 2
as shown in Table 6 .
Table 6
Estimated Area Annual Property Tax Impacts
Floodplain Economic Impact Analysis
Development No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
New Sq. Ft, New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
Area # 1 2645807 234,631 (30, 176) -11 % 37,578 (2277230) -86%
Area # 2 210885945 11817,806 (271 , 139) -13% 1 ,207,615 (8817330) -42%
Area # 3 363,346 312,587 (50,759) -14% 1851172 (178, 173) -49%
Area # 4 785000 78,000 0 0% 0 (78,000) -100%
Total 217951098 254431024 (3521074) -13% 1 ,4305365 (113641733) -49%
Assessed Value No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
New AV AV Diff. from No Change % Diff. AV Diff. from No Change % Diff.
Area # 1 $12,7935573 $11 , 186,265 ($17607,307) -13% $ 1 ,636,793 ($11 , 156,780) -87%
Area # 2 $45,7855176 $39,604,808 ($6, 1802368) -13% $25,8421423 ($19,942,753) -44%
Area # 3 $9,8865521 $6,963,200 ($21923,321 ) -30% $994, 188 ($83892,333) -90%
Area # 4 $8,0245400 $4,0551940 ($31968,460) -49% $0 ($8,024,400) -100%
Total $7614899669 $61 ,8101213 ($14,67%456) -19% $283473,403 ($487016,266) -63%
Property Tax No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Property Tax Property Tax Diff. from No Change % Diff. Property Tax Diff. from No Change % Diff.
9.797 9.797 9.797
Area # 1 $ 1255339 $109,592 ($152747) -13% $16,036 ($1095303) -87%
Area # 2 $448,557 $388,008 ($60,549) -13% $2531178 ($1953379) -44%
Area # 3 $965858 $68,218 ($28,640) -30% $9,740 ($87, 118) -90%
Area # 4 $785615 $39,736 ($382879) -49% $0 ($785615) -100%
Total $7499369 $6059555 ($1431815) -19% $278,954 ($4701415) -63%
Source: City of Fort Collins; Economic & Planning Systems
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To estimate the impact on potential future sales tax revenues received by the City , EPS applied
an overall average annual sales factor of $ 250 per square foot to all existing and future new
retail development . Depending on the subarea , retail square footage ranged from 50 to 100
percent of the identified commercial/ retail development . EPS then applied the current total City
sales tax rate of 3 . 85 percent sales tax rate to estimated annual sales . Under Options 1 and 2 ,
based on the estimated reduction in overall economic development in the area , the City would
collect approximately $ 432 , 000 and $ 2 million less sales tax revenue , respectively, than under
current regulations as shown in Table 7 .
Table 7
Estimated Area Annual Sales Tax Impacts
Floodplain Economic Impact Analysis
Development No Change- 0.5 Floodway Option 1 - 0. 1 Floodway Option 2- 100-year Floodplain
New Sq. Ft. New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
Area # 1 264,807 234,631 (30, 176) -11 % 377578 (2277230) -86%
Area # 2 2,088,945 1 ,817,806 (2713139) -13% 1 ,207,615 (8817330) -42%
Area # 3 363,346 312,587 (50,759) -14% 1857172 ( 1787173) -49%
Area # 4 78,000 78,000 0 0% 0 (787000) -100%
Total 21795,098 25443,024 (352,074) -13% 1 ,430,365 ( 1 ,364,733) -49%
Ann. Sales No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Ann. Sales Ann. Sales Diff. from No Change % Diff. Ann. Sales Diff. from No Change % Diff.
Area #' l $28,569,968 $24,577, 773 ($3,9923195) -14% $2,0397456 ($26,5307512) -93%
Area #' 2 $28, 120,957 $24, 184,606 ($3,9363352) -14% $ 14,6857487 ($13,4357470) -48%
Area #' 3 $11 ,806,008 $8,519,288 ($312861720) -28% $0 ($11 ,8067008) -100%
Area #'4 $0 $0 $0 0% $0 $0 0%
Total $68,496,934 $577281 ,666 ($ 111215,267) -16% $167724,943 ($51 ,7713990) -76%
Sales Tax No Change- 0.5 Floodway Option 1 - 0. 1 Floodway Option 2- 100-year Floodplain
Sales Tax Sales Tax Diff. from No Change % Diff. Sales Tax Diff. from No Change % Diff.
3.85% 3.85% 3,85%
Area # 1 $1 ,0995944 $946,244 ($ 153,700) -14% $78,519 ($1 ,0219425) -93%
Area # 2 $1 ,0825657 $931 , 107 ($ 151 ,550) -14% $565,391 ($5179266) -48%
Area # 3 $4545531 $327,993 ($ 1263539) -28% $0 ($4549531 ) -100%
Area # 4 $0 $0 $0 0% $0 $0 0%
Total $2,6377132 $2,205,344 ($431 ,788) -16% $6435910 ($17993,222) -76%
Source: City of Fort Collins; Economic & Planning Systems
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In total , the City is estimated to have $ 575 , 000 less in potential annual tax revenue under Option 1 .
Under Option 2 , the City is estimated to have $ 2 . 5 million less in potential annual tax revenue as
shown in Table 8 .
Table 8
Area Total Annual Tax Impacts
Floodplain Economic Impact Analysis
Development No Change- 0.5 Floodway Option 1 - 0. 1 Floodway Option 2- 100-year Floodplain
New Sq. Ft. New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
Area # 1 264,807 234,631 (30: 176) -11 % 377578 (2277230) -86%
Area # 2 2,088,945 1 ,817,806 (2713139) -13% 1 ,2077615 (8817330) -42%
Area # 3 363,346 312, 587 (503759) -14% 185, 172 ( 1787173) -49%
Area # 4 78,000 78,000 0 0% 0 (787000) -100%
Total 21795,098 21443,024 (352,074) -13% 11430,365 (11364,733) -49%
Total Tax No Change- 0.5 Floodway Option 1 - 0. 1 Floodway Option 2- 100-year Floodplain
Total Tax Total Tax Diff. from No Change % Diff. Total Tax Diff. from No Change % Diff.
Area # 1 $1 ,225,282 $1 ,055,836 ($ 1691446) -14% $94,555 ($191309728) -92%
Area # 2 $1 ,5315214 $1 ,3191116 ($212,099) -14% $8189569 ($7129645) -47%
Area # 3 $5515390 $396,211 ($ 155, 179) -28% $99740 ($5419649) -98%
Area # 4 $785615 $395736 ($381879) -49% $0 ($789615) -100%
Total $3,3867501 $2,810,899 ($575,602) -17% $922,864 ($23463,637) -73%
Source: City of Fort Collins; Economic & Planning Systems
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Non - Area Parcel Impacts
There are other individual parcels or clusters of parcels elsewhere along the Poudre River
corridor outside of the four identified areas of analysis . These areas include a large amount of
agricultural and open space land outside the immediate path of development . These parcels were
evaluated on a more cursory level by tabulating the total number parcels, acreage , existing
development, and impacted areas .
EPS aggregated these parcels into three geographic areas identified on the maps in the Appendix
as follows :
• Area A - This area includes all parcels in the floodplain and west of Area 1 .
• Area B - This area includes all parcels in the floodplain along Mulberry just west of
Timberline Road , not included in Area 3 , as well as all parcels in the floodplain south to
Prospect along Summit View Drive .
• Area C - This area includes all parcels in the floodplain south of Prospect and not included in
Area 4 .
Based on the above, the proposed floodplain changes would affect approximately 1 , 500 acres of
floodplain property , with 414 acres of this total located in the existing floodway as shown in
Table 9 . Under Option 1 , a total of 420 acres are within the floodway , reducing the area outside
the floodway by 6 . 4 acres, or about 1 . 0 percent . Under Option 2 , because nearly 1 , 100 acres are
in the floodplain , the area affected would be reduced by 678 acres, or 60 percent . The development
potential and related market values in these areas have not been analyzed at this time .
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Table 9
Non -area Parcels Affected
Floodplain Economic Impact Analysis
Existing No Chance- 0.5 Floodwav Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Area Acres Sq. Ft. Building Sq. Ft. Assessed Value Acres in Floodway Net Acres Acres in Floodway Acres Diff. from No Change % Acres in Floodplain Net Acres Diff. from No Change %
Area 577.7 255370,634 1795463 1 ,373,480 82.2 500.2 7.0 575.4 75. 1 15% 327.3 255. 1 -245. 1 -49%
Area B 92.8 45045, 146 65,448 2,0381120 32.0 60.8 33.3 59.6 -1 .3 -2% 50. 1 42.8 -18.0 -30%
Area C 827.7 38, 1935069 817361 17260,320 299.9 576.9 380.2 496.6 -80.3 -14% 715.2 161 .6 -415.3 -72%
Total 11498.2 67,608,849 326,272 $4,671 ,920 414.1 1 ,138.0 420.6 15131 .5 -6.4 -1 % 1 ,092.5 459.6 -678.4 -60%
Source: City of Fort Collins; Economic & Planning Systems
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3 . NCURA AND DDA IMPACTS
The proposed changes to the existing Poudre River floodplain regulations would affect a number
of floodplain parcels in the North College Urban Renewal Area ( NCURA) and the Downtown
Development Authority ( DDA) outlined below :
North College Urban Renewal Authority ( NCURA) - An area north of Old Town , east and
west of North College Avenue .
Downtown Development Authority ( DDA) - An area surrounding Old Town and extending
east to Lemay .
Both districts have the ability to institute tax increment financing (TIF) under Colorado legislation ,
which allow each authority to recapture growth in tax revenue over time . As a result, the City has
a particular interest in the potential tax revenue impacts on the proposed floodplain regulations .
Development Impacts
The NCURA plan area includes approximately 27 parcels affected by the proposed regulations,
with 22 parcels in Area 1 ( along N . College Avenue ) and five in Area 1A ( along Hickory Street) ,
for a total of 33 . 8 acres as shown in Table 10 . Under Option 1 , potential development would be
reduced by 27 , 000 square feet . Under Option 2 , potential development is reduced by 208 , 000
square feet . This translates into an estimated loss of new market value of $ 5 . 8 million and
$40 . 6 respectively .
The DDA has a total of 17 parcels in the floodplain , with eight in Area 1 ( south of Vine Street)
and nine in Area 2 ( along Linden Street and Lincoln Ave . ) for a total of 27 . 5 acres of impacted
parcels , as shown in Table 10 . As a result of Option 1 , potential development is reduced by
3 , 000 square feet . Under Option 2 , potential development area is estimated to be reduced by
27 , 000 square feet . This translates into an estimated loss in new market value of $ 1 . 3 and $4 . 4
million , respectively .
Table 10
TIF Area Estimated Development Impacts
Floodplain Economic Impact Analysis
Development Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Dev. Sq. Ft. New Sq. Ft, New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
URA 33.8 825418 2455231 217,874 (27,357) - 11 % 375578 (207,654) -85%
DDA 27.3 110,453 318,025 315,207 (2,819) -1 % 291 ,525 (26,501 ) -8%
Market Value Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
MV New MV New MV Diff. from No Change % Diff. New MV Diff. from No Change % Diff.
URA 33.8 --- $4658645151 $417015,941 ($55848,210) - 12% $652715236 ($40,592,915) -87%
DDA 27.3 --- $49,929,902 $49,619,846 ($310,056) -1 % $47,014,818 ($2,915,084) -15%
Source: City of Fort Collins; Economic & Planning Systems
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Property and Sales Tax Impacts
The reduction in estimated development potential under Options 1 and 2 would result in lower
potential property tax revenue to each district . Because the NCURA has the ability to capture
the tax increment attributable to the total of all applicable property tax levies ( not just the City's
9 . 797 mills ) , EPS applied the applicable assessment and total mill rates of 86 . 53 to estimate the
tax increment revenues for the NCURA . Under the projections for reduced development
potentials under Options 1 and 2 , the NCURA would collect $ 132 , 000 and $917 , 000 less in
annual property tax revenue , respectively , as shown in Table 11 .
The applicable TIF rate in the DDA boundary is 91 . 53 mills . The DDA is eligible to collect 50
percent of the tax increment in future years . Therefore , under the projections for reduced
development potentials under Options 1 and 2 , the DDA would collect $4 , 000 and $ 35 , 000 less in
annual property tax revenue , respectively, as shown in Table 11 .
Table 11
TIF Area Estimated Property Tax Impacts
Floodplain Economic Impact Analysis
Development Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Dev. Sq. Ft. New Sq. Ft. New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
URA 33.8 82,418 245,231 217,874 (27,357) - 11 % 375578 (207,654) -85%
DDA 27.3 110,453 318,025 315,207 (25819) -1 % 291 ,525 (26,501 ) -8%
Market Value Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
MV New MV New MV Diff. from No Change % Diff. New MV Diff. from No Change % Diff.
URA 33.8 --- $46,8645151 $41 ,015,941 ($5,848,,210) - 12% $6,271 ,236 ($40,592,915) -87%
DDA 27.3 --- $49,929,902 $49,619,846 ($3105056) -1 % $47,014,818 ($219151084) -6%
Property Tax Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Property Tax Property Tax Property Tax Diff. from No Change % Diff. Property Tax Diff. from No Change % Diff.
URA 86.53 86.53 86.53 86.53
DDA 91 .53 91 .53 91 .53 91 .53
URA 33.8 $ 156,553 $1 ,058,395 $926,318 ( 1325078) - 12% $141 ,632 (916,764) -87%
DDA @50% TIF 27.3 $74,465 $271 ,967 $268,264 (3,704) -1 % $2375148 (34,820) -13%
Source: City of Fort Collins; Economic & Planning Systems
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To estimate the impact of potential forgone sales tax revenue to each district, EPS applied an
average annual sales factor per square foot of $ 250 to all existing and future new retail
development . Depending on the subarea , retail square footage ranged from 50 to 100 percent
of the identified commercial/ retail development . EPS then applied the City 's 3 . 85 percent sales
tax rate to estimated annual sales . Under the estimated reductions in development potentials
under Options 1 and 2 , the NCURA will forgo potential annual sales tax revenue of $ 154 , 000 and
$ 1 . 0 million , respectively, as shown in Table 12 . The floodplain parcels in the DDA area are not
expected to produce any new retail development, and as a result, no potential sales tax revenue
reductions were estimated .
Table 12
TIF Area Estimated Sales Tax Impacts
Floodplain Economic Impact Analysis
Development Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Dev. Sq. Ft, New Sq. Ft. New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
URA 33.8 825418 2455231 217,874 (27,357) - 11 % 375578 (207,654) -85%
DDA 27.3 110,453 318,025 315,207 (2,819) -1 % 291 ,525 (26,501 ) -8%
Annual Sales Acres No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Ann. Sales Ann. Sales Diff. from No Change % Diff. Ann. Sales Diff. from No Change % Diff.
URA 33.8 --- $28,569,968 $2415771773 ($35992, 195) -14% $2,039,456 ($26,530,512) -93%
DDA 27.3 --- $0 $0 $0 0% $0 $0 0%
Sales Tax Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Sales Tax Sales Tax Sales Tax Diff. from No Change % Diff. Sales Tax Diff. from No Change % Diff.
385% 385% 3.85% 3B5%
URA 33.8 --- $1 ,099,944 $946,244 ($ 153,700) - 14% $78,519 ($1 ,021 ,425) -93%
DDA 27.3 --- $0 $0 $0 0% $0 $0 0%
Source: City of Fort Collins; Economic & Planning Systems
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In total , the NCURA would forgo the potential in annual tax revenue of approximately $ 286 , 000
under the estimated reduction in development potentials under Option 1 and approximately $ 1 . 9
million under Option 2 , as shown in Table 13 . In total , the DDA would forgo the potential
annual tax revenue of approximately $4, 000 under the estimated reduction in development
potentials under Option 1 and approximately $ 35 , 000 under Option 2 as shown in Table 13 .
Table 13
TIF Area Estimated Total Tax Impacts
Floodplain Economic Impact Analysis
Development Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Dev. Sq. Ft. New Sq. Ft. New Sq. Ft. Diff. from No Change % Diff. New Sq. Ft. Diff. from No Change % Diff.
URA 33.8 82,418 245,231 217,874 (27,357) - 11 % 37,578 (207,654) -85%
DDA 27.3 110,453 318,025 315,207 (2,819) -1 % 291 ,525 (26,501 ) -8%
Total Tax Acres Existing No Change- 0.5 Floodway Option 1 - 0.1 Floodway Option 2- 100-year Floodplain
Total Tax Total Tax Diff. from No Change % Diff. Total Tax Diff. from No Change % Diff.
URA 33.8 --- $2, 158,339 $1 ,8721562 ($285,777) - 13% $220, 151 ($119381188) -90%
DDA 27.3 --- $2715967 $268,264 ($3,704) -1 % $237, 148 ($34,820) -13%
Source: City of Fort Collins; Economic & Planning Systems
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4 . INDIRECT AND INDUCED IMPACTS
The total economic impact to the City of the proposed floodplain regulations would include not
only the estimated loss of overall potential development value and associated tax revenue , but
also the associated loss in economic output and employment associated with the one -time
construction costs of potential development and the ongoing employment associated with
potential development upon occupancy . These related economic impacts are described in fuller
detail below :
• Construction Impacts - Construction projects generate direct, indirect, and induced
impacts on the larger economy in which the projects occur . These impacts sum to the total
estimated economic impact of the construction project and occur one -time , or only during the
construction period . In this case , construction impacts represent the construction value of
potential development under each option .
• Ongoing Employment Impacts - The employment that occupies the commercial/ retail and
office development generates direct, indirect, and induced impacts through wages , profits ,
and purchases . These are ongoing impacts, which occur upon absorption of new development .
In this case , employment includes commercial/ retail and office tenants that are estimated to
occupy potential development under each option .
The IMPLAN model ( Impact Analysis for Planning ) is used to estimate the impacts in this
analysis . IMPLAN was originally developed by the USDA Forest Service , Federal Emergency
Management Agency , Bureau of Land Management, and University of Minnesota as a tool for
informing decisions in land and resource planning . The model is based on a matrix that
describes the relationships (transactions) between industries , commodities (goods and services) ,
and institutions ( households , government, etc . ) . IMPLAN calculates the direct, indirect, and
induced impacts of an economic event, defined as follows :
• Direct Impact - Direct impacts represent the value or impact of the action taken , in this
case the construction spending for the estimated development potential , and the jobs
occupying the estimated commercial/ retail and office development . Direct impacts represent
the construction value of the estimated new development activity under each option , including
supplies , worker compensation , and other direct spending associated with the project .
• Indirect Impacts - Indirect impacts represent the increases in economic activity by local
suppliers necessary to support the direct impacts . For example , the development costs
associated with the buildout of estimated development potential under each option would
result in an increase in demand from building materials suppliers and professional services,
who will in turn increase their purchases from their suppliers . This cycle of increased
spending in the economy resulting from the direct impacts represents the indirect impacts .
Intra - business transactions resulting from the direct employment occupying potential
development estimated under each option also represent indirect impacts .
• Induced Impact - Induced impacts ( often referred to as the multiplier effect) represent the
impact from the spending of household income derived from wages generated by the direct
and indirect impacts . Induced impacts include all varieties of household expenditures such
as retail purchases , services, housing , and transportation expenditures .
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IMPLAN generates its results in either economic output or employment, using industry data on
output per employee in each relevant industry .
One - Time Construction Impacts
Indirect and induced impacts to the City and surrounding area are generated by the direct
investment in the construction and development industry as a result of the estimated
development potential in each area . These impacts are 'gone -time " - that is they occur only
during construction and do not continue after construction is completed . In this case , economic
impacts are generated to the City of Fort Collins and surrounding area ( Larimer County ) by the
construction of new development potential estimated for each option .
EPS estimated the direct impact to the construction industry ( construction value ) by applying a
factor of 80 percent to market value . The timing of these impacts will be determined by the
timing of estimated new development .
Economic Output
Under Option 1 , based on the reduction in estimated development potentials , the loss of $ 66 . 4
million of market value would represents approximately $ 53 . 1 million of construction value , as
shown in Table 14 . Under Option 2 , the estimated loss of $ 254 million of market value
represents approximately $ 203 million of construction value .
IMPLAN identifies an indirect multiplier in Larimer County of 0 . 21 for the construction industry
and an induced multiplier of 0 . 28 . Thus, for every dollar of direct investment, a total of 1 . 49
dollars is generated to the County . Applying this multiplier to the estimated value of construction
loss under Option 1 , EPS estimates the one -time construction impact to the City of Fort Collins
and surrounding area to be $ 79 . 3 million . Applying this multiplier to the estimated value of
construction loss under Option 2 , EPS estimates the one -time construction impact to the City of
Fort Collins and surrounding area to be $ 303 million . The estimated impact under each option
would be expected to occur over-time as areas are redeveloped , but would not continue after full
buildout of the identified areas .
Employment
Based on industry data of economic output per employee , IMPLAN can generate the equivalent
impacts in terms of jobs . Thus the estimated loss of $ 53 . 1 million of construction value under
Option 1 is the same as 445 construction jobs as shown in Table 14 . The estimated loss of
$ 203 million of construction value under Option 2 is the same as 1 , 704 construction jobs .
The same multipliers can be applied to determine the indirect and induced impacts to employment .
Under Option 1 , EPS estimates the one -time construction impact to the City of Fort Collins and
surrounding area to equate to 665 fewer construction jobs . Under Option 2 , EPS estimates the
one -time construction impact to the City of Fort Collins and surrounding areas to equate to 2 , 544
fewer jobs . The estimated impact under each option would occur over-time as areas are
redeveloped , but would not continue after full buildout of the identified areas .
Economic & Planning Systems, Inc. 23 Final Report
Floodplain Economic Impact Analysis
116111
Table 14
One-Time Estimated Construction Impacts
Floodplain Economic Impact Analysis
Development Option 1 -No Change Option 2- 0.1 Floodway Option 3- Floodplain
Comm./Retail Office Residential Total Comm./Retail Office Residential Total Diff. from No Charge % Comm./Retail Office Residential Total Diff. from No Change %
New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft.
Area # 1 151 ,306 113,502 0 264,807 127,648 106,983 0 234,631 ($30,176) -11 % 9,064 28,513 0 37,578 ($227,230) -86%
Area # 2 164,976 411 ,174 1 ,512,795 2,088,945 141 ,650 354,135 1 ,322,022 118173806 ($271 ,139) -13% 82,025 245,307 875,283 1s202,615 ($886,330) -42%
Area # 3 104,942 178,341 80,063 363,346 75,727 156,797 80,063 312,587 ($503759) -14% 0 105,110 80,063 1857172 ($178,173) -49%
Area # 4 0 78,000 0 78.000 0 78,000 0 78,000 $0 0% 0 0 0 0 ($78,000) -100%
Total 421 ,224 781 ,016 11592,858 2,795,098 345,025 695,915 154025085 2,443,024 ($352,074) -13% 91 ,089 3783930 9553346 114257365 ($1 ,36%733) -49%
Market Value Option 1-No Change Option 2- 0.1 Floodway Option 3- Floodplain
Comm./Retail Office Residential Total Comm./Retail Office Residential Total Diff. from No Change % Comm./Retail Office Residential Total Diff. from No Change %
Area # 1 $31 ,800,324 $17,217,196 $0 $4%017,519 $26,35%109 $16,5007144 $0 $42,85%253 ($67158,266) -13% $2,084,778 $4,186,459 $0 $6,271 ,236 ($42,746,283) -87%
Area # 2 $37,344,490 $62,026,637 $277,070,236 $376,441 ,362 $31 ,979,389 $53,303,035 $242,128,638 $327,411 ,061 ($49,030,301 ) -13% $18,865,775 $35,596,411 $160,304,887 $214,767,073 ($161 ,674,290) -43%
Area # 3 $24,136,728 $9,933,515 $13,877,554 $47,9475796 $17,417,210 $59452,567 $13,8779554 $363747,331 ($115200,464) -23% $0 $0 $13,877,554 $13,877,554 ($34,070,242) -71 %
Area # 4 $0 $15,540,000 $0 $15,540,000 $0 $1535407000 $0 $15,540,000 $0 0% $0 $0 $0 $0 ($15,540,000) -100%
Total $93,281 ,541 $104,717,347 $290,947,789 $488,9465678 $75,755,708 $9057955746 $256,0065192 $422,557,646 ($665389,032) -14% $20,950,552 $39,782,870 $174,182,441 $234,915,863 ($254,030,815) -52%
Factor
Construction Value' 80.0% $7456255233 $83,7735878 $232,7585232 $391 ,157,342 $60,604,567 $72,6365597 $204,804,954 $338,046,117 ($5351115225) -14% $16,760,442 $31,826,296 $1395345,953 $18759325690 ($203,224,652) -52%
Construction Employment' 0.00001 626 702 15951 3,279 508 609 11717 2,834 -445 -14% 141 267 1 ,168 11576 -11704 -52%
Outputz Multipliers
Direct Impact 1 .00 $74,625,233 $83,773,878 $232,758,232 $391 ,157,342 $60,604,567 $72,636,597 $204,804,954 $338,046,117 ($53,111 ,225) -14% $16,760,442 $31 ,826,296 $139,345,953 $187,932,690 ($20322245652) -52%
Indirect Impact 0.21 $15,654,061 $17,573,163 $48,825,461 $82,052,685 $12,712,959 $15,236,906 $42,961 ,730 $70,911 ,596 ($11 ,1411089) -14% $3,515,821 $6,676,170 $29,230,461 $39,422,453 ($42,6305232) -52%
Induced Impact 0.28 $21 ,134,538 $23,725,516 $65,919,226 $110,779,280 $17,163,759 $20,571 ,338 $58,002,606 $95,737,703 ($15.041 .577) ACj $4,746,708 $9,013,493 $39,464,028 $53,224,229 ($57,555.0501 -525jj
Total 1 .49 $111 ,413,831 $125,072,556 $3473502,919 $583398%306 $90j4813285 $10%444,841 $305376%290 $50436953416 ($797293,891) -14% $253022,971 $47,515,960 $208,0403442 $280,57%372 ($30324095934) -52%
Emplovment�
Direct Impact 1 .00 626 702 1 ,951 3,279 508 609 1 ,717 2,834 -445 -14% 141 267 1 ,168 1 ,576 -1 ,704 -52%
Indirect Impact 0.21 131 147 409 688 107 128 360 594 -93 -14% 29 56 245 331 -357 -52%
Induced Impact 0.28 177 199 553 929 144 172 486 803 -126 -14% 40 76 331 446 483 -52%
Total 1 .49 934 1 ,049 2,913 4,896 759 909 2,563 4,231 -665 -14% 210 398 1 ,744 21352 -2,544 -52%
'Construction Value estimated at 80 percent of market value
21MPLAN
Source: City of Fort Collins; Ecommic 8 Planning Systems
H�W9-Fcn Collins FloW an ReguWionr tak[208931MPr E wrncImpact Maly sAs]4-One-Time El
Economic & Planning Systems, Inc. 24 Final Report
Floodplain Economic Impact Analysis
116111
Annual Ongoing Impacts
Tenants that occupy the potential new commercial/ retail and office development estimated under
each option represent new employment in the area and therefore generate direct, indirect, and
induced impacts through wages , profits , and purchases . In this case the new tenants represent
direct employment impacts . Indirect impacts include jobs created from the transactions involved
in maintaining operations of the businesses occupying the commercial/ retail and office
development . Induced impacts represent jobs created by the spending of household income
derived from wages generated by the direct and indirect employment . All of these are impacts
are ongoing ; that is , they occur upon absorption of new commercial/ retail and office
development and continue in perpetuity .
To estimate the annual ongoing direct impacts associated with potential development estimated
under each option , EPS applied assumptions about the number of employees expected to occupy
new space . EPS applied a factor of four employees per 1 , 000 square feet of building for
commercial/ retail development and three employees per 1 , 000 square feet for office
development . Residential development is not occupied by employees , and therefore , does not
generate any anticipated ongoing business activity . Thus, the 352 , 000 square feet of estimated
reduction in development under Option 1 , would equate to approximately 560 permanent jobs .
Under Option 2 , the 1 . 4 million square feet of estimated reduction in development would equate
to approximately 2 , 500 permanent jobs . These direct employment impacts would occur over-
time as construction completes and then in perpetuity .
Economic Output
Using IMPLAN , the equivalent estimated loss of direct employment based on reduced estimated
development potentials under Option 1 represents $ 91 . 6 million of annual economic output, as
shown in Table 15 . Under Option 2 , the estimated reduction of direct employment represents
$ 353 . 4 million of annual economic output .
IMPLAN identifies an indirect multiplier in Larimer County of 0 . 11 for the retail industry ( average
of retail store categories ) and an induced multiplier of 0 . 34 . Thus, for every dollar of direct
economic investment in the retail industry , a total of 1 . 46 dollars of economic output is
generated to the County . For office - using industries, IMPLAN estimates a total multiplier of 1 . 52 .
Applying these multipliers to the estimated value of lost ongoing retail and office activity under
Option 1 , EPS estimates the annual impact to the City of Fort Collins and surrounding area at
$ 138 . 5 million . Applying these multipliers to the estimated value of lost ongoing retail and office
activity under Option 2 , EPS estimates the annual impact to the City of Fort Collins and
surrounding area to be $ 644 . 9 million annually . These annual impacts would occur upon the full
buildout of development potential under each option . This is likely to occur over an extended
period of time .
Employment
As calculated above , the 352 , 000 square feet of estimated reduction in development under
Option 1 would equate to approximately 560 permanent jobs . Under Option 2 , the 1 . 4 million
square feet of estimated reduction in development would equate to approximately 2 , 500
permanent jobs , as shown in Table 15 . The same multipliers can be applied to determine the
Economic & Planning Systems, Inc. 25 Final Report
Floodplain Economic Impact Analysis
116111
indirect and induced impacts to employment . Under Option 1 , EPS estimates annual ongoing
impacts to the City of Fort Collins and surrounding area would equate to the loss of approximately
833 permanent jobs . Under Option 2 , EPS estimates the annual ongoing impacts to the City of
Fort Collins and surrounding areas would equate to the loss of approximately 3 , 760 jobs . These
annual impacts would occur upon the full buildout of the estimated development potentials under
each option . This is likely to occur over an extended period of time .
Economic & Planning Systems, Inc. 26 Final Report
Floodplain Economic Impact Analysis
116111
Table 15
Estimated Annual Ongoing Impacts
Floodplain Economic Impact Analysis
Development Option 1 -No Change Option 2- 0.1 Floodway Option 3- Floodplain
Comm./Retail Office Residential Total Comm./Retail Office Residential Total Diff. From No Change % Comm./Retail Office Residential Total Diff. from No Change %
New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft. New Sq. Ft.
Area # 1 1513306 113,502 0 2643807 127,648 106,983 0 234,631 -309176 -11 % %064 28,513 0 37,578 -227,230 -86%
Area # 2 1643976 411 , 174 17512,795 29088,945 1413650 3543135 133223022 118175806 -2719139 -13% 82,025 245,307 8753283 11202,615 -886,330 -42%
Area # 3 104,942 178,341 80,063 363,346 75,727 156,797 80,063 3125587 -509759 -14% 0 105, 110 80,063 185,172 -178,173 -49%
Area # 4 0 78,000 0 78,000 0 78,000 0 78,000 0 0% 0 0 0 0 -78,000 -100%
Total 421 ,224 7819016 1 ,592,858 2,795,098 3459025 6959915 1 ,402,085 2,443,024 -352,074 -13% 91 ,089 3789930 955,346 1 ,425,365 -1 ,369,733 -49%
Employment Option 1 -No Change Option 2- 0.1 Floodway Option 3- Floodplain
Comm./Retail Office Residential Total Comm./Retail Office Residential Total Diff. from No Change % Comm./Retail Office Residential Total Diff. from No Change %
4 /1 ,000 Sq. Ft. 3 /1 ,000 Sq. Ft. --- 4 /1 ,000 Sq. Ft. 3 /1 ,000 Sq. Ft. --- 4 /1 ,000 Sq. Ft. 3 /1,000 Sq. Ft. ---
Area # 1 605 341 0 946 511 321 0 832 -114 -12% 36 86 0 122 -824 -87%
Area # 2 660 19234 0 1 ,893 567 11062 0 15629 -264 -14% 328 736 0 1 ,064 -829 -44%
Area # 3 420 535 0 955 303 470 0 773 -181 -19% 0 315 0 315 -639 -67%
Area # 4 0 234 0 234 0 234 0 234 0 0% 0 0 0 0 -234 -100%
Total 1 ,685 2,343 0 4,028 1 ,380 29088 0 3,468 -560 -14% 364 19137 0 1 ,501 -21527 -63%
Output/Emp.' $55,084 $293,205 --- --- $555084 $2935205 --- --- --- --- $55,084 $2935205 --- --- --- --
Output $92,8%135 $686,994,467 $0 $77%804,602 $7690209818 $61291379840 $0 $688,158,658 ($91 ,645,944) -12% $20,070,114 $33393129787 $0 $353,382,901 $35353825901 -55%
Multipliers'
Direct Impact 1 .0 1 .0 --- --- 1 .0 1 .0 --- --- --- --- 1 .0 1 .0 --- --- --- ---
Indirect Impact 0.11 0.27 --- --- 0. 11 0.27 --- --- --- --- 0. 11 0.27 --- --- --- ---
Induced Impact 0.34 0.25 0.34 0.25 --- 034 0.25 --- --- --- ---
Total 1 .46 1 .52 ---
-- 1 .46 1 .52 --- --- --- 1 .46 1 .52 ---
Output'
Direct Impact $9228102135 $68629942467 $0 $77978047602 $76,020,818 $612, 137,840 $0 $68821582658 ($91 ,645,944) -12% $20,070,114 $333,312,787 $0 $353,3822901 ($42694219701 ) -55%
Indirect Impact $1035383034 $18531373399 $0 $195,675,433 $8,631 ,708 $164,964,367 $0 $17325962075 ($22,079,358) -11 % $2,278,841 $8978247104 $0 $92,1022945 ($10395729488) -53%
Induced Impact $31 ,728,301 $174,856,210 $0 $206,584,510 $25,988,663 $155,803,442 0 $181 ,792, 106 ($24,792,405) -12% $6,861 ,218 $84,835,924 0 $91 ,697,143 ($114,887,368) -56%
Total $135,0769470 $19046,988,076 $0 $1918290649545 $110,641 ,189 $932,905,650 $0 $1v043v5469839 ($138,517,706) -12% $29,2109174 $507,972,815 $0 $537,182,989 ($64438813557) -55%
Employment'
Direct Impact 12685 23343 0 42028 11380 21088 0 31468 -560 -14% 364 11137 0 12501 -21527 -63%
Indirect Impact 191 631 0 823 157 563 0 719 -103 -13% 41 306 0 348 -475 -58%
Induced Impact 576 596 0 1 172 472 531 0 1 003 -169 -14% 125 289 0 414 -758 -65%
Total 2,452 31571 0 61023 29009 3,182 0 5,190 -833 -14% 530 1 ,732 0 2,263 -31760 -62%
Note: Multipliers for Comm./Retail and Office represent averages of retail stores and office using industries
'IMPLAN
Source: City of Fort Collins; Economic & Planning Systems
HVC&M-Fotl Collins Floodplain Reguia ionUara\20099-I1MPIAN Emnomic l ry d Mal sis bs]9 OnWM El Emp
Economic & Planning Systems, Inc. 27 Final Report
5. OTHER CONSIDERATIONS
Limitations
The economic impacts in the four areas studied represent a highest and best use estimate of future
development over an extended time period . The total impacts may or may not be realized due
to multiple factors including the ability or interest of property owners to capitalize on the potential
development opportunities or aggregate parcels to optimize development potentials . Future
development could also take place at lower densities than estimated , which would reduce the
overall potential for new development and relative impacts of regulatory changes commensurately .
All economic impacts ( direct, indirect, and induced ) reported represent gross potential impacts ,
not " net new " impacts . If the development potential identified under each option is not built , a
portion of this projection of private construction ( office , retail , residential , etc . ) would likely occur
elsewhere in the City and surrounding area to meet regional demand . Only employment generated
from primary jobs ( businesses relocating from outside of Larimer County) , destination retail uses
not located in the region , and natural regional growth can be considered net new .
The IMPLAN model operates on the assumption that constant returns to scale exist . That is,
each unit of increase in employment results in the same unit increase in output and productivity .
The model also assumes there are no constraints on supply and demand . In other words ,
IMPLAN assumes that there is demand for each good or service produced . Output that is not
consumed locally within the study area is assumed to be exported , and local industries can
expand production to meet demand . Despite these limitations , IMPLAN remains the most precise
model for estimating Gross Economic Impacts .
Policy Options
The proposed floodplain changes would affect individual parcels and ownerships differently .
Some parcels have only minor portions of the site affected by the floodway and/or floodplain
while others have large portions that are located within the mapped floodway or floodplain . In
some cases , floodplain mitigation measures can reduce or eliminate the portion of a parcel within
the floodplain or floodway using existing map revision procedures . Because the feasibility and
cost/ benefit of these engineered solutions varies from property to property and must be
evaluated on a case by case basis , consideration of these mitigating factors is outside the scope
of this analysis .
Economic & Planning Systems, Inc. 28 20889rpt 010611_Final. doc
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ATTACHMENT 10
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amec
Poudre River Flood Damage Impact Assessment
Impacts on Existing and Future Development
January 4th , 2011
Revised Draft
Prepared for :
City of Fort Collins Utilities
700 Wood Street
Fort Collins , CO 80521
Prepared by :
AMEC Earth and Environmental
1002 Walnut Street , Suite 200
Boulder, Colorado 80302
303 =443 =7839
1 of 37
Introduction
This report summarizes a study that estimated the economic and other detrimental impacts from
flooding on existing and proposed development in four study areas along the Poudre River in
the City of Fort Collins , Colorado . HAZUS- MH , FEMA' s GIS - based natural hazard loss
estimation tool , was used to perform a flood loss estimation for existing development within the
four study areas . Flood impacts to proposed development focused on flood disruption losses ,
based on development projections combined with estimation based on accepted methods and
values associated with both FEMA' s HAZUS - MH and benefit cost analysis software products .
Proposed development projected building occupancy and square footage was obtained from a
separate economic impact study prepared by a consultant in December 2010 . A qualitative
discussion of the potential impacts that were difficult to quantify supplements the disruption cost
calculations . The results and additional details on the methods follow in this report .
City identified four primary geographic areas for this study based on flood risk and development
pressures that are consistent with the separate economic impact study . The Poudre River
floodplain study areas included :
• Study Area 1 - A portion of the North College Urban Renewal Area ( NCURA) north of the
downtown area at the intersection of North College Avenue and Vine Street .
• Study Area 2 — An area at the southwest section of Lincoln and Lemay , featuring the
Link- N - Green Golf Course redevelopment parcels , several contiguous parcels to the
west , one large parcel on the north side of Lincoln , and flood prone parcels along Linden
Street near the intersection of Buckingham Street .
• Study Area 3 - An area east of Lemay Avenue and south of Mulberry Street .
• Study Area 4 - A portion of WW Reynolds Office Park , Gateway Medical Clinic , and
Neenan Development offices along the north and south sides of Prospect Avenue .
The Study Areas contain a total of 149 existing structures within the 100-year floodplain and are
represented in Figure 1 . The existing structures are primarily commercial however Study Areas
1 and 3 include some residential development . More detailed information on the structures can
be referenced in tables located at the end of this report .
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Figure 1 Poudre River Study Areas and 100 Year Flood Depth Grids
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Flood Impacts on Existing Development
HAZUS - MH was used to perform a flood loss estimation on existing structures within the 4
Study Areas . Site-specific building information for each of the study areas was provided by the
City of Fort Collins . The building data was formatted and imported into the HAZUS regions for
analysis . Flood depth data was developed for each study for the 10-year flood ( 10% annual
chance ) , 50-year flood (2 % annual chance ) and 100-year flood ( 1 % annual chance ) events .
Both the hazard (flood depth ) and inventory ( buildings ) data was imported into HAZUS . Depth
damage functions were applied to create a detailed loss estimate for buildings in the study
areas for the various flood events .
Damage Assessment Methodology
Buildings
The HAZUS - MH Comprehensive Database Management System was used to upload site-
specific building information , including latitude/ longitude , structure and contents values , building
occupancy ( property) type , date of construction , building type , and presence of basement . For
buildings with missing or incomplete data ( roughly 56 of the 149 total buildings ) , the following
assumptions were made to complete the building inventory . Assumptions were based on
existing building footprint data , parcel and associated assessor' s data , and aerial imagery
interpretation .
• Occupancy type was assumed either residential , commercial or mobile home , based on
high - resolution areal imagery and interpretation from other attributes ;
• An average commercial building value of $ 100 , 000 and an average residential building
value of $ 87 , 000 was applied to those buildings with missing data , based on typical
values in the study areas ;
• Commercial contents value was assumed to be 100 % of building value ; residential
contents value was assumed to be 50 % of building value ( based on FEMA guidance )
and was applied to all buildings based on occupancy type ;
• Masonry is the most frequent building type in the available data and was applied to
those buildings with missing building type ;
• Average residential year of construction ( 1916 ) and the majority commercial year of
construction ( 1979 ) was applied to those buildings with missing attributes , based on
occupancy type ;
• Residential structures were all assumed to have one story , as data was too limited to
make further distinctions ;
• Average cost of an out building ($ 5 , 000 ) was applied to 2 Public Open Lands District
structures , and to small commercial buildings present on the same lot as higher value
commercial structures .
• Where building valuation data was included with the building footprints , the assessor' s
data was used . Where there was not valuation data in either dataset , the previous
assumptions were applied .
Flood Depth
Depth data in ESRI Grid format was supplied by Ayres Associates for the 10-year flood ( 10 %
annual chance ) , 50-year flood (2 % annual chance ) and 100-year flood ( 1 % annual chance )
events for each of the 4 Study Areas . Depth data was imported into HAZUS for analysis of the
depth of flooding at each building location .
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Depth Damage Functions
HAZUS determines flood damage on a site-specific basis based on the depth of flooding at the
location of the facility . Depth damage functions were selected from HAZUS based on the
building ' s occupancy type . Depth damage functions used within HAZUS applicable to this study
are listed below , along with their source . More detail the Depth Damage Functions and the
percent of damage associated with the various flood depths can be referenced in the technical
appendix at the end of this report .
• Commercial , average retail ( U . S . Army Corps of Engineers )
• Residential , one floor - no basement ( Flood Insurance Administration )
• Residential , one floor - with basement ( Flood Insurance Administration )
• Residential , mobile home ( Flood Insurance Administration )
Depth damage functions were specified by building within HAZUS in the 4 Study Areas , based
on their occupancy type . Initial results showed that the appropriate depth damage functions
were not being applied within HAZUS , resulting in lower loss estimates . Discussions with
HAZUS developers revealed that a known ` bug ' in HAZUS - MH MR4 and HAZUS - MH MR5
keeps the software from applying user-specified damage functions , and instead it uses its
default curves . The software does allow the user to edit the damage function to apply to
buildings . This method was used for the commercial structures for the 100 -yr analysis in Study
Area 1 and Study Area 2 , but was not successful for residential structures or Study Areas 3 and
4 . All other damage estimates were calculated outside of HAZUS within a spreadsheet , using
the depth damage functions mentioned previously . For these calculations depth values were
rounded up to the highest whole foot interval and the appropriate percent damage applied ,
consistent with methods used in other City of Fort Collins master planning studies .
Income Related Losses and Debris Generation Estimates
These losses were included in the analysis to capture additional losses due to business
interruption and debris estimates . Income related losses include a one-time flood disruption
cost , rental income losses , and capital income losses . In order to calculate these losses the
level 1 HAZUS building inventory was used , which is aggregated to the Census Block Level .
Displaced Population
Displaced population was based on multiplying the count of residential structures by a 2 . 52
average household size factor based on the Census 2000 estimates for Fort Collins .
Results
Results of the analyses are presented in the following table , which is followed by a discussion of
the results by Study Area .
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Table 1 Estimated Flood Loss to Existing Development by Study Area
Building Contents Income - Total Displaced Debris
Return Period Damage Damage Related Loss Damage Population* Generated
Study Area 1
100-year Flood $ 513, 017 $ 1 , 001 , 272 $ 231000 $ 115371289 15 . 1 29 tons
50-year Flood $ 3711016 $ 661 , 771 $ 151000 $ 1 , 047 , 787 12 . 6 19tons
10-year Flood $ 2001644 $ 262 , 583 $ 71000 $ 470 , 227 12 . 6 7 tons
Study Area 2
100-year Flood $ 3501491 $ 1 , 038, 074 $ 81000 $ 1139,61565 0 0
50-year Flood $ 2951737 $ 863, 163 $ 31000 $ 1 , 161 , 901 0 0
10-year Flood $ 351129 $ 101 , 967 $ - $ 137 , 096 0 0
Study Area 3
100-year Flood $ 423, 655 $ 1 , 221 , 743 $ - $ 11645 , 398 52 . 9 3 tons
50-year Flood $ 2121357 $ 622 , 519 $ - $ 8347876 10 . 1 3tons
10-year Flood $ 1131503 $ 333, 916 - $ 447 , 419 0 . 0 -
Study Area 4
100-year Flood $ 21965 $ 10, 656 $ 231000 $ 367621 0 9 tons
50-year Flood $ 21865 $ 10, 056 $ 11000 $ 137921 0 -
1 0-year Flood $ - $ - - $ - - -
* Based on residential buildings only, 2 . 52 average household size
Average annualized losses for each study area shown in Table 2 were calculated based on an
equation consistent with HAZUS- MH which represents the sum of the probabilities of the three
flood events multiplied by the sum of the total losses for each event . Annualized losses
represent the potential flood damage weighted by the probability of that damage occurring any
given year.
Annualized Loss = [( . 01 + . 02 + . 1 )*( 10-year flood $ loss + 50-year $ flood loss + 100-year flood $ loss )]
Total losses across all four Study Areas for the 100-year flood event equate to $4 . 5 million .
Annualized losses across all four Study Areas are $ 1 . 1 million .
Table 2 Average Annualized Loss by Study Area
Study Area 1 $ 3977189
Study Area 2 $ 3507423
Study Area 3 $ 3807600
Study Area 4 $ 61570
Total $ 151345783
Study Area 1 has an annualized loss of $ 397 , 189 , the highest of the four Study Areas . Both the
50 and 100 year floods have potential to cause over $ 1 million in damages . Study Area 1 has 30
commercial structures and 7 residential structures . The highest damages are to the residential
structures at 101 and 105 E . Vine Dr. There is an estimated displaced population of 15 persons
for the 100-year event and 13 for the 50 and 10—year events . This Study Area also has the
most potential for debris generation .
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Study Area 2 has 23 commercial structures , with a total damage of $ 1 , 645 , 398 for the 100 -year
event . The annualized loss for these buildings is $ 350 , 423 . Both the 50 and 100 year floods
have potential to cause over $ 1 million in damages in this area .
Study Area 3 has the most buildings of the four Study Areas , with 53 commercial structures and
25 manufactured homes . All but 4 of the manufactured homes are in the 100-year floodplain .
The 21 residential structures in the floodplain resulted in a displaced population estimate of 53
persons for the 100-year event . Most of the mobile homes are outside of the 50 and 10 year
floodplains . The Study Area ' s annualized loss is $ 380 , 600 .
Study Area 4 is comprised of 11 commercial structures , similar to Study Area 2 . Although
flooding is fairly deep for the 100 -year event in this study area ( > 2 ft at inundated structures ) ,
damage estimates are lower because of low structure values . The two high value structures , at
1625 Sharp Point Dr. and 2620 E . Prospect Rd . , are both outside of the floodplain . The
annualized loss for the Study Area is $ 6 , 570 .
Flood Impacts on Future Development
The second aspect of this study was an estimate of losses to development not yet in place .
One of the key assumptions in this study is that new or substantially improved development will
conform to local floodplain regulations that are designed to limit or reduce losses to the 100-
year or higher frequency flood . For example , commercial buildings may be constructed or
substantially improved , but new construction is required to be elevated or floodproofed 2 feet
above the 100-year flood elevation . Larger floods can occur that exceed the flows and depths
associated with a 100-year flood event , which is the basis for the additional 2 foot of `freeboard '
to allow for an increased factor of safety . The potential for damage remains when larger flood
events exceed the 100-year flood design levels of the elevated or floodproofed buildings , or
where debris blocks drainage and increases flood depths and extents . This study did not
examine the potential direct building and content losses from floods that exceed the 100-year
flood depths and extents . The study assumes no direct building impacts from the 100-year
flood to new development , though that possibility could exist due to errors in mapping and/or
debris modifying the flow and impacts of floodwaters .
Residual damages and indirect costs may still be incurred to conforming development during a
100 -year flood event . These include direct social losses ( public safety impacts ) , as well as
direct and indirect economic losses . Losses will be distributed among the community , including
individuals , businesses , and the City . While it is not possible to quantify some of the future
impacts due to a number of unknown variables , some of the impacts can be estimated with
knowledge of the extent , type and location of proposed development and knowledge of the flood
hazards including flood extent , depth and time of inundation .
Residual damages associated with new development that could be expected from a flood are
listed below . The asterisk (* ) indicates those damages that may be estimated quantitatively , as
discussed in the methodology section that follows :
Potential public safety and health impacts
• Risk to employees
• Risk to customers
• Casualties
• Emergency services time , resources and personnel risks
o Evacuation and rescue costs
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Economic Losses ( related to length of time facility is inaccessible or non -operational )
• Capital - related income loss*
o Loss of services/sales due to restricted access to businesses
o Net loss of wages
• Displacement costs *
o Costs for temporary relocation
o Business disruption costs
o Rental income loss (to building owners )
Physical damages
• Debris removal costs
• Cleanup costs
• Dewatering costs
• Parking lots
• Landscaping
• Vehicles
• Equipment or materials stored outside the premises
• Utility damages — repair costs and disruption costs
o Sewer
o Water
• Buildings
o For floods exceeding the 100 -year flood flows or where manual closure of
floodproofing shields cannot be implemented due to rapid onset or flooding
during off- business hours .
• Contents
o For floods exceeding the 100 -year flood flows or where manual closure of
floodproofing shields cannot be implemented due to rapid onset or flooding
during off- business hours .
• Infrastructure damage from flooding and erosion
o Road repairs
o Bridge repairs
o Bike path repairs
Methodology
FEMA has developed methodologies and standard assumptions to estimate displacement and
income related losses from floods . These methods and standards are used in FEMA's benefit
cost analysis modules for estimating the ` benefits , ' or losses avoided , associated with a hazard
mitigation project , or used to estimate flood damage within HAZUS - MH . Table 3 shows
examples of the typical values for displacement costs associated with various commercial and
industrial buildings used within HAZUS- MH . These values can be applied to estimate losses to
proposed development with knowledge of the occupancy type and approximate square footage
of the development . Other costs such as debris removal , cleanup , and emergency services can
be estimated based on costs associated with past events .
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Table 3 Example Flood Displacement Costs Based on Building Type
Bullding Type Displacement Costs
[A] [ B]
HAZUS- MH MR3 Rental Cost Disruption
Label Occupancy Class ( 2008 ) Costs ( 2008 )
"21month $ ,ft.
Residential
RES1 Single Family Dwelling 0 .73 0 . 88
RES2 Mobile Home 0 . 51 0 . 88
Multi Family Dwelling ( All Types
RES3 includes duplex to 50 + units : 0 . 65 0 . 88
RES4 Temporary Lodging 2 . 19 0 . 88
RES5 Institutional Lodging - 0 .44 0 . 88
RES6 ! Nursing Home 0 . 80 0 . 88
Commercial
COM1 Retail Trade 1 . 25 1 . 17
COM2 Wholesale Trade 0 . 52 1 . c21
COM3 Personal and Repair Services 1 .46 1 . 02
COM4 Professional,'Technical/Business 1 .46 1 . 02
COM5 Panks 1 . 82 1 . 02
COM6 Hospital 1 .46 1 .46
COM7 Nledical Office/ Clinic 1 .46 1 .46
COM8 Entertainment and Recreation 1 . 82 0 . 00
COM9 Theaters 1 . 82 0 . 00
COM10 Parking 0 . 36 0 . 00
Industrial
IND1 Heavy 0 . 21 0 . 00
IND2 Light 0 . 29 1 . 02
IND3 Food/Dru s/Chemicals 0 . 29 1 . 02
IND4 Metals?Mineral Processing 0 . 21 1 . 02
INCF Hi h Technology 0 . 36 1 . 02
INCr, I Constructton 0 . 1 F 1 . 02
Source : FEMA Benefit cost analysis reference guide , 2009
A separate economic impact study was used as the basis for estimates of the occupancy
classes and amount of square footage for proposed development . This study was prepared by
Economic & Planning Systems ( EPS ) , Inc . in December 2010 with the intent to estimate the
economic impacts from floodplain regulations and associated building restrictions . The same
four study areas along the Poudre River were analyzed by EPS . The EPS estimates of square
footage for commercial and office development was based on developable parcels that
intersected the floodplain and were taken from Table 2 of that study . Some of these parcels may
be partially , and not wholly , within the floodplain . For the purposes of this study it is assumed
that all new building square footage is located within the floodplain .
The EPS study compared the ( re )development potential of each study area under three
identified options that correspond to options related to floodplain management regulations :
• No change option = No changes to existing floodplain regulations
• Redefining the floodway definition to a 1 / 10`h foot rise ( Option 1 )
• No structures within the 100 year floodplain (Option 2 )
The no change option allows the most potential for development , the floodway change option
( Option 1 ) is more restrictive , and the no-structures in the 100 year floodplain option (Option 2 )
is the most restrictive on future development .
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The analysis of losses to future development investigated the 100-year flood impacts only .
Impacts associated with lesser but more frequent events ( 10 and 50 year floods ) are not
estimated as the EPS report analyzed development in the 100-year flood hazard areas only . It
is assumed that disruption costs would be associated with new development from the 50 year
events , but they would be of a smaller magnitude due to shallower and less extensive
floodwaters .
This study assumes proposed development is floodproofed , thus downtime will primarily be
associated with the time the buildings are inaccessible during the flooding and post-flood
cleanup . Displacement downtimes are typically much longer (and costlier) for commercial
buildings that have not been floodproofed due to the time needed for repair and clean up from
the flooding . A 1988 U . S . Army Corp of Engineers hydrology report for the Poudre River
estimates that a 100 year flood along the Poudre River in Fort Collins will rapidly peak within 5
hours of the flood onset and continue to have flood flows in excess of 12 , 000 cfs for 7 hours .
The total elapsed time from flood onset to return to baseline flows is estimated to be 17 hours .
For the purposes of this study a 48 hour (2 day) downtime is estimated to allow time for debris
removal and cleanup .
The EPS study summarized development potential into commercial/ retail and office categories .
These categories were associated with the equivalent HAZUS occupancy classes as shown in
Table 4 so that the appropriate displacement cost factors could be applied (see Table 3 ) .
Further classification was not possible due to unknowns associated with the specific types of
future development . New residential development is not allowed in the floodplain per local
regulations and thus not analyzed . Residential development indicated in the EPS study is
located outside of the floodplain . Loss types and assumptions are described in more detail in
Table 4 .
Table 4 Potential Development Losses and Assumptions
Loss type Explanation and assumptions
Flood Disruption Disruption costs based on HAZUS values for one time disruption
costs ;
EPS Comm ./Retail — Used HAZUS value COM1 — Retail Trade
EPS Office — Used COM4 — Professional/Technical/Business
Rental income losses rental costs of $ 1 . 25/sq ft/month or $0 . 042/sq ft/day for
Comm/Retail ( HAZUS COM 1 )
$ 1 . 46/sq ft/month or $0 . 048/sq ft/day for Office ( HAZUS COM 4 ) ,
based on HAZUS values multiplied by 2 days
Capital income loss - retail Estimated annual retail sales from EPS report divided by 365 to
calculated average daily sales , multiplied by 2 days
Sales tax reductions Reduction in sales tax revenue , based on the calculated reduction
in capital income multiplied by the City' s 3 . 85% sales tax rate ;
Sales tax reductions are not accounted for in the HAZUS income
related losses associated with the existing development analysis .
Flood Displacement Analysis Results
Table 5 displays the results of the flood displacement loss analysis . Results are shown by the
three floodplain regulation options and the four Study Areas . The table also includes the total
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damage losses from the existing development analysis to present a comprehensive damage
estimate . Income related losses include four primary flood displacement costs , which are
similar to the HAZUS income losses , with the exception of the sales tax loss reduction :
• Flood Disruption
• Rental income losses
• Capital income losses
• Sales tax reductions
A more detailed table with the breakdown of the square footage estimates and detail on the
displacement losses can be referenced in the appendix .
Table 5 Summary of Potential and Existing Damages from the 100-year Flood
Total
Future Total Existing and
Future Future Development Debris Damage Future
Building Contents Income- Removal Existing Development
Option Damage Damage IRelated Loss Costs Development Losses
Study Area 1
No change N/A N/A $ 478 , 980 $ 56 , 280 $ 1 , 537 , 289 $ 2 , 072 , 549
0 . 1 floodway (Option 1 ) N/A N/A $ 419 , 322 $ 56 , 280 $ 1 , 53712891 $ 2 , 012 , 891
No structures (Option 2 ) N/A N/A $ 547793 $ 567280 $ 11537 , 289 $ 11648 , 362
Study Area 2
No change N/A N/A $ 8257770 $ 27680 $ 1 , 396 , 565 $ 2 , 225 , 015
0 . 1 floodway (Option 1 ) N/A N/A $ 710 ,463 $ 2 , 680 $ 1 , 396 , 5651 $ 2 , 109 , 708
No structures (Option 2 ) N/A N/A $ 460 , 189 $ 2 , 680 $ 1 , 396 , 5651 $ 1 , 859 , 434
Study Area 3
No change N/A N/A $ 397 , 807 $ 2 , 680 $ 1 , 645 , 398 $ 2 , 045 , 885
0 . 1 floodway (Option 1 ) N/A N/A $ 318 ,425 $ 2 , 680 $ 1 , 645 , 398 $ 1 , 966 , 503
No structures (Option 2 ) N/A N/A $ 1177302 $ 27680 $ 11645 , 398 $ 11765 , 380
Study Area 4
No change N/A N/A $ 87 , 048 $ 2 , 680 $ 36 , 621 $ 126 , 349
0 . 1 floodway (Option 1 ) N/A N/A $ 877048 $ 27680 $ 36 , 621 $ 1267349
No structures (Option 2 ) N/A N/A 0 $ 27680 $ 36 , 621 $ 39 , 301
The no change option is assumed to be the least restrictive floodplain development option .
Thus the future losses to proposed development with this option are the highest of the three
options . Totaling the future 100-year flood losses across all study areas within this option yields
an estimated $ 1 . 78 million in flood disruption costs , assuming the two -day downtime interval .
Totaling potential loss for existing and future development for this option yields $6 . 4 million for
the four study areas . In all options Study Area 2 has the potential for highest losses to future
development , followed by Study Area 1 . The losses estimated by this study are partially
dependent on the length of disruption . A two day disruption period is estimated , based on the
Corp study , but disruption time may vary depending on debris generated and other priority
cleanup needs elsewhere in the City . It is possible that the disruption period in some areas
could be as long as 7 days . A disruption period of 4 days would double the losses represented
in table 5 .
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Other Impacts — Debris removal
Debris removal estimates for the four study areas total $ 64 , 320 , as shown in Table 5 . The
College Avenue railroad bridge over the Poudre River within Study Area 1 has the most
potential to be impacted by debris than the other study areas . Debris removal efforts are
estimated to require a crew of 5 working 24 hours a day for 7 days following a flood event . This
is an estimate based on discussion with the City Maintenance Supervisor .
Other Impacts — Populations at Risk
While a new business or office building may be floodproofed , employees and customers will
need to be evacuated in the event of a flood . In the best case scenario there will be adequate
warning to allow evacuation of persons and vehicles , but floods in Colorado often occur with
very little warning time . The increased likelihood of people in a flood hazard area ( i . e . building
occupants , customers at businesses ) puts additional strain on first responders and limited
emergency resources . The table below provides an estimate of employees that may be present
in floodprone commercial and and /or office buildings should development occur as projected by
the EPS economic impact study . The estimates come directly from the EPS study , where they
used a factor of four employees per 1 , 000 sq . ft . of commercial/retail development and three
employees per 1 , 000 sq . ft . of office development . The same factors were applied to estimate
employees currently in flood - prone commercial development . The results are shown in Table 7
by study area , which total to an estimated 884 employees across all four study areas . Assuming
the no change option , the projected total of existing and additional employees within the
floodplain could be on the order of 4 , 913 persons .
Table 6 Estimated Additional Employees within the Floodplain
No Change 1 0. 1 Floodway (Option 1 ) No Structures ( Option 2)
Comm ./Retail Office Totals Comm ./Retail Office Totals Comm ./Retail Office Totals
Area 1 605 341 946 511 321 832 36 86 122
Area 2 660 1 , 234 1 , 894 567 17062 1 , 629 328 736 1 , 064
Area 3 420 535 955 303 470 773 0 315 315
Area 4 0 234 234 0 234 234 0 0 0
Total 1 1 ) 6851 2 , 3441 4, 0291 17381 2, 0871 31468 3641 1 , 137 1 , 501
Table 7 Estimated Existing Employees within the Floodplain
Commercial
Development (Sq ft ) Employees Estimated
Area 1 811091 324
Area 2 361685 147
Area 3 94 , 199 377
Area 4 81953 36
Tota I 1 22099281 884
Summary
The four study areas along the Poudre River as developed are prone to losses from flooding ,
with the greatest potential for loss at Study Area 1 due to it being the most developed . The
potential for losses to future development will be primarily associated with disruption costs .
Study Area 2 has the greatest floodplain development potential and thus the damages
associated with future development in this area would be accordingly higher. While difficult to
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quantify the specific impacts , the potential exposure of additional people to flood risks
associated with new development should not be underestimated . Other damages not quantified
in this study include parking areas , landscaping , utility lines and infrastructure impacts . The
losses associated with future floods on the Poudre River in Fort Collins to both existing and
future development will be shared by the City, individuals , and businesses .
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APPENDIX
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Technical Documentation and Detailed Loss Tables
The following worksheets are included in the attached spreadsheet :
Worksheet 1
Inventory : The 149 buildings in the 4 Study Areas are listed with the following attributes :
address , property type , year built , building value , contents value , latitude , longitude , building
type , and building and contents damage functions used .
Worksheet 2
100yr Analysis : % building and contents damage , $ damage and total damage from the 1 %
annual chance ( 100-yr) flood event are reported by building for each of the Study Areas .
Worksheet 3
50yr Analysis : % building and contents damage , $ damage and total damage from the 2 %
annual chance ( 50-yr) flood event are reported by building for each of the Study Areas .
Worksheet 4
10yr Analysis : % building and contents damage , $ damage and total damage from the 10 %
annual chance ( 10-yr) flood event are reported by building for each of the Study Areas .
Worksheet 5
Damage Curves : Percent damage by flood depth for structure and contents are listed for each
of the following damage curves :
- Commercial , average retail ( COM1 )
- Residential , one floor / no basement ( RES1 )
- Residential , one floor / with basement ( RES1 B )
- Residential , mobile home ( RES2 )
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ATTACHMENT
Poudre River Floodplain Regulations
Potential Revimill
sions
City Council Work Session
January 11 , 2011
Ken Sampley, P. E.
Water Planning and Development Manager
Josh Birks
Economic Advisor
Purpose of Review
— The City is attempting to reduce flood risk in
the Poudre River basin .
— Further development in the floodplain results in
increased risk to existing properties
• Increases flood elevations and velocities
• Changes flow patterns
— By allowing more development in areas prone
to flooding , addonal people and property ,
including emergency response personnel , are
at risk .
F�tf
Purpose of Review
- Review of Floodplain Regulations is one
aspect of the Stormwater Repurposing effort .
- The only floodplain regulations being reviewed
are for the Poudre River because :
• It is the largest watershed in the city
• It has the potential to generate the highest flows ,
deepest depths and highest velocities during a flood
event
• It cannot be modified with engineering solutions .
• The best way to prevent future flood losses is
through floodplain regulations .
Background Information
• Key Considerations
- Options under consideration are ONLY for
the Poudre River floodplain and floodway.
- Irrespective of current or proposed
regulations , floodway and floodplain
boundaries CAN be revised by a FEMA map
change process . This requires detailed
engineering analyses and submittals to the
City and FEMA.
F� [tins
Background Information
• Key Considerations ( Cont ' d )
— There are currently 3 (three) Sets of Distinct
Floodplain Regulations in City Code :
• Poudre River ( FEMA-Mapped )
• Other FEMA-Mapped Floodplains (Spring
Creek, Dry Creek, Boxelder Creek and
Cooper Slough )
• City-Mapped Floodplains ( Old Town ,
Fossil Creek, etc . )
Fit,f
Background Information
August 24 , 2010 Council Work Session
Staff directed to address the following questions
1 . What is the purpose and need to change the
floodplain regulations ?
2 . Analyze the impact on properties in more
detail .
3 . Provide more economic analysis .
4. Describe better " Less people at risk" — how
many?
5. Provide more information on " No Adverse
Impact" to the public and to the Council .
F�t
General Direction/Specific Questions
1 . Does Council feel that sufficient outreach and
analysis has been provided for them to make
an informed decision regarding the Poudre
River Floodplain Regulations ?
2 . Does Council have comments and/or direction
with regard to the specific options identified ?
[tins
Why Just the Poudre River?
Poudre is the largest
watershed in the city
Drains 1 ,537 square
miles of land into Fort
v , - -- r,� Collins
r.
Generates a peak flow of
13,300 cfs and velocities
over 13 fps
Can flood for days or
.. . weeks vs. hours in other
basins
Floods can be caused by
rain, snowmelt, and rain-
1904 Poudre River flood . High water on-snow storm events
mark on homes in Andersonville.
FL tf�
Why Just the Poudre River?
• Solutions are more difficult on the
Poudre
- Construction projects cannot block or divert
a major flood
- There are no feasible or cost effective
construction projects that will mitigate flood
damage
- Only viable approach is to manage risk
through floodplain regulation
[tins
Public Outreach Summary
• Specific Property Owner Letters
• Individual ( One -on -one ) Meetings
• Presentations to Boards/Commissions
• Presentations to Citizen Groups
• Open House
• Open House boards at Aztlan Center
• Media/ News Releases
City of
• Website ,wF`o_rtollins
Current Regulations Option 1 Option 2
Acres m 100-Year Acres to 0 5-foot Adddional Acres in Total Acres in Acres in
Floodplam Floodway 0 1 -foot Floodway 0 1-toot Floodway Flood Fringe
City Lrcnits 380 203 42 245 178
Growth
Management 860 283 69 354 576
Area
Total jkm lv240 487 111 598 753
• • • Tel • • • ' • 1 • 1 1
ease • - •
•
6
Public • .
Specific PropertyOwner Letters
For ollins
Public • .
Specific PropertyOwner Letters
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Public Outreach
Specific Property .�u..,
Owner Letters
The table on the right
summarizes changes
the three options have
on the primary
floodplain regulations
for the floodway and
flood fringe. Red text
indicates where the
regulations would
become more
restrictive, black text
indicates current
regulations .
Public Outreach
Boards and Commissions
Land Conservation & Stewardship August 11 , 2010
Planning and Zoning August 13, 2010
Water Board August 19, 2010
Natural Resources Advisory Board October 20, 2010
Natural Resources Advisory Board December 15, 2010
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Public Outreach
City Departments
Advance Planning July 28, 2010
Natural Resources August 2 , 2010
Natural Areas Advisory Board October 20 , 2010
Natural Resources Senior Staff November 4, 2010
Planning and Economic Development November 18, 2010
Public Outreach
Business Groups
North Fort Collins Business Association August 25, 2010
Downtown Development Authority September 9, 2010
Commercial Brokers September 16, 2010
Ft Collins Area Chamber of Commerce September 17 , 2010
North Fort Collins Business Association September 22 , 2010
North College Citizen Advisory Group October 7, 2010
South Fort Collins Business Association December 8 , 2010
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Public Outreach
Other Government Agencies
Larimer Board of Co . Commissioners October 25, 2010
Other Groups
Save the Poudre August 11 , 2010
Wildlands Restoration Volunteers November 2 , 2010
Open House November 18 , 2010
Public Outreach
November 18 , 2010 Open House
• Fort Collins Stormwater and Floodplain
Administration Staff reviewed Presentation
Boards and key considerations associated with
the Poudre River Floodplain Regulations with
Open House Attendees
• Staff received feedback from attendees on the
potential floodplain regulation options .
FCity
of [ins
1
Public Outreach
November 18 , 2010 Open House
• AIS Attachment 5 -
Contains a Table Public Open House.
Poudre River Floodplain ReguiaUons Review.
summarizing
comments from the , . '
Open House
• AIS Attachment 5 - y
Listing of all comments
received at the Open '�
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Public Outreach
November 18 , 2010 Open House
Summary of Frequent Comments
(Comment Theme from Open House � kio I ncy ,
(This adversely impacts businesses. '�
22
The regulations are ok the way they are currently. �—
There is alot of money being spent on this effort by the City.
Seems wasteful. _
Seems like over regulation by the City. -��
Support for increased floodplain regulations. �� �
This seems like a taking or condemnation. Compensation is
needed for affected businesses. i
The risk is felt to be low. ,� 9 1
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Public Outreach
November 18 , 2010 Open House
Summary of Frequent Comments
Comment Theme from Open House �� Freque�
Support for most strict option of no structures in th ��
�floodplain .
rrhe Poudre River should be allowed to run naturally . �-
A lot of Community and City effort has gone into the North
College area . These regulations would negate all the money
land effort already spent.
Don 't allow property owners to flood or impact property
caned by others . ( No Adverse Impact) .
(Fort Collins is already more restrictive than most �_
I4_�om m unities .
(Public Safety should be of highest priority. Building in the '�
loodplain is dangerous .
Public Outreach
• Website
♦`J
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V
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r
F�t
tly Asked Questions
• Won 't the Glade Reservoir - Northern
Integrated Supply Project ( NISP )
reduce flooding on the Poudre River by
storing flood flows in the reservoir?
No . NISP is not proposed as a flood
control project. It can only divert a
maximum of 1 ,200 cfs using pumps
assuming an empty reservoir and the
100 -year flood on the Poudre is 13 , 300 cfs .
Fit,f
Frequently Asked Questions
• Why can ' t engineering solutions
significantly reduce flooding on the
Poudre River?
The Poudre River Master Plan studied and
reviewed a wide variety of alternatives
including structural engineering facilities .
They are infeasible due to the high
discharge ( 13 , 300 cfs ) , large runoff
volumes and existing federal and state
environmental and regulatory constraints .
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Frequently Asked Questions
• Other communities outside Colorado
have similar regulations , but none in
Colorado are as stringent as those
currently in place in Fort Collins .
Fort Collins is not a categorical industry
leader in floodplain regulations in
Colorado .
Several states and municipalities enforce
higher floodplain standards than those in
Fort Collins . at,, of
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Frequently Asked Questions
• Attachment 2
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»e��000e©gym
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Frequently Asked Questions
• Won 't flood insurance pay for damages and
losses to buildings and property? Isn 't the
business/property owner taking all the risk?
No. Flood insurance has limited coverage ( up to
$500,000) for non -residential buildings and
contents . The value of businesses usually exceed
the amount of insurance.
In addition , flood insurance does not pay for
business interruption or lost wages .
Taxpayers pay for flood losses when a Presidential
disaster is declared .
Frequently Asked Questions
• Don 't the current regulations account
for displaced floodwater from new
development?
No . The current regulations allow flood
elevations to rise 0 . 5 feet. As properties
develop in the flood fringe , floodwater is
forced onto other properties , including
those that are in the floodplain and
sometimes to those that originally were out
of the floodplain .
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Frequently Asked Questions
• The City spent millions of dollars ($ 10M + )
making improvements to the Dry Creek
drainage area to take properties along North
College Avenue out of the floodway. Won 't
the revised Poudre River regulations negate
all that effort and money?
No . The improvements reduced the Dry Creek
Floodplain , which is different than the Poudre
River Floodplain , The Dry Creek project
removed 4 ,400 lineal feet of frontage from the
floodplain on the west side of College Avenue
and 3 , 100 ft lineal feet of frontage from the
floodplain on the east side . c� of
F`rt
Poudre River Floodplain Reg Options
• Option #1 : The Poudre River floodplain
regulations be revised to adopt a 0 . 1 foot rise
floodway; OR
• Option #2 : The Poudre River floodplain
regulations be revised to not allow any structures
in the 100-year floodplain ; OR
• Option #3 : No change to the Poudre River
floodplain regulations ( null alternative) ; OR
• Additional Option : #4 — No Adverse Impact
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Floodplain Regulations
Definitions
and
Concepts
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Current Regulations
• Non -structural development in the flood fringe CAN
be approved administratively by City staff.
• Development within the floodway MUST be
modeled hydraulically. Approval through the City
IS required and a FEMA Letter of Map Revision
( LOMR) Process MAY be required .
• Within the above continuum , there ARE varying
levels of development and modification that can be
done dependent on the project type and location .
F�t
Flood • Revisions
Available under all
options
Ped�rnl l:mrrM.nry AlamiKrm�mt . .•ruy
• revisions �errea ar YAl aewaa
OETEMYM.ETpY pOCUYEM
based on • •
r �W.4� RMY.sr ..I�aw�u.
changes
Hydraulic models •
• construction
.r a ter. un _�• r��w_M_ �M a . -..
changes • • • • lain
�1r
mapping
revisedThe floodway can be
• ll affected property
wners are _r
�.Y�1iv V���T�i1Y.�Y.�r�wr•r�+
• notified by
mail
• / • Regulations
Poudre River at
100-year Floodplain
FringeChance
Flood Flood-> Flood Stage
Fill Material 0 .5-ft Rise Floodway Fringe Fill Material
BFE 0.5-ft Rise
Riparian Channel Riparian
Overbank Overbank
18
Floodplain Regulations
Allowable Rise Concept by Current Codes
100- ear Flood lain � wider
New ,
Structure Existing Structure ,
Not in Floodplain
�i _ Fill Material
BFE Small Rise i
�N
Ilk
Overbank Channel Overbank
Poudre River Floodplain Reg Options
38
19
Impact of Each Option on
Floodplain and Floodway
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Option # 1 - 0 . 1 Foot Rise Floodway
• Widens current floodway to slightly larger area
• Increases area subject to existing floodway
regulations ( prohibits new structures and
additions in expanded floodway) .
• Permits trails , parks , infrastructure ( bridges
and culverts ) , monuments , golf courses ,
parking areas , landscape features , and other
non -structural development
• New structures and additions can still be
constructed in the flood fringe
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20
Option # 1 - Benefits and Detriments
PRIMARY BENEFITS DETRIMENTS
• Reduces threats to life Removes structural
safety and property development
damage , opportunity on impacted
• Reduces damage - parcels
rebuild cycle Building expansion will
(sustainable) be more difficult
• Reduces local funding Not consistent with
demands for post-flood current zoning practices
clean -up
• Reduces absenteeism
and lost productivity city of
after floods Fort Collins
Option # 1 - Benefits and Detriments
( cont' d )
SECONDARY BENEFITS DETRIMENTS
• Protects a larger May not be consistent
natural corridor with City-wide visions
• Promotes riparian like Plan Fort Collins
health and biodiversity Inconsistent with
• Consistent with Larimer County
current best practices regulations
in floodplain Cost to remap floodway
management May reduce net City
• Consistent with pre- revenue
2007 regulations
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Option # 1 - Funding and Implementation
If Option #1 is the Preferred Option , the following
are funding and implementation approaches :
a . Pursue FEMA funding ($250 , 000) to remap
the Poudre River (3-5 year
implementation ) .
b . Use City funds ($250 , 000) to remap the
Poudre River (2 -3 year implementation ) .
c . Use City funds ($50 , 000 — $70 , 000 ) to only
remap the 0 . 1 foot floodway (6 month to 1
year implementation ) .
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Option #2 - No Structures in
100 -year Floodplain
• Floodway does not change .
• New structures and additions are prohibited in the
100 -year floodplain
— A structure is defined as having two or more
outside rigid walls and attached roof.
• Increases development restrictions over Option # 1
by further reducing developable area .
• Permits trails , parks , infrastructure ( bridges and
culverts ) , monuments , golf courses , parking areas ,
landscape features , and other non -structural
development ari °f
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Option #2 = Benefits and Detriments
PRIMARY BENEFITS DETRIMENTS
• Further reduces threats Removes more
to life safety and structural development
property damage , opportunity from more
• Further reduces lands
damage-rebuild cycle New structures and
(sustainable) additions prohibited in
• Further reduces local entire 100 -year
funding demands for floodplain
response and clean -up Not consistent with
• Further reduces current zoning
absenteeism and lost practices
productivity after floods F�t
Option #2 - Benefits and Detriments ( cont ' d )
SECONDARY BENEFITS DETRIMENTS
• Protects a larger • May not be consistent
natural corridor with City-wide visions
• Promotes riparian like Plan Fort Collins
health and • Inconsistent with
biodiversity Larimer County
• More consistent with regulations
current best practices • May further reduce
in floodplain City revenue
management • Requires a change to
City Code
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Option #3 - No Change to Current
Regulations
• No change to floodplain or floodway
boundaries .
• No change to the floodplain regulations
— New residential and mixed -use structures
are not allowed in the flood fringe
— New non -residential structures and
additions are allowed in the flood fringe .
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Option #3 - Benefits and Detriments
PRIMARY BENEFITS DETRIMENTS
• No implementation • Allows new development
costs or City Code in areas of flood risk
revisions ( Primary) ' New obstructions divert
• Continuity of regulations floodwaters onto
at jurisdictional existing neighbors
boundaries with Larimer Limits preservation of
County ( Primary) river functions and
• Limits the protection of
riparian health and
habitat
F�t Collins
Option #4 - No Adverse Impact ( NAI )
• Goal -- Prevent the worsening of flooding on
existing homes and businesses through
responsible floodplain development.
• Basic NAI principle - One property owner can
not adversely impact the rights of other
property owners .
• NAI would promote new development on the
Poudre River that
- Fits into the surrounding infrastructure and
environment
- Is equitable to surrounding neighbors and
- Is economically and environmentally sustainable .
Option #4 - No Adverse Impact ( NAI )
• NAI does not take the place of or circumvent
floodplain regulations .
• In fact, NAI works to correct floodplain and
social liabilities of existing floodplain
regulations .
- The current Poudre River floodplain
regulations allow property owners to create
obstructions to flood flow that can force
floodwaters onto existing neighbors .
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Option #4 — No Adverse Impact ( NAI )
• Implementation of NAI requires that new
development or redevelopment demonstrate
through engineering analysis :
• Certification required from PE and CFM
• No increase in base flood elevation ( BFE)
• No adverse impacts on adjacent, upstream
and downstream properties including
— No increase in flood velocities
— No increase in erosion or sedimentation
— No increase in flood damage.
Option #4 - Benefits and Detriments
PRIMARY BENEFITS DETRIMENTS
• Reduced threats to life Approach is results
safety and property based versus
damage ( Primary) prescriptive regulations
• Protection of existing — less certainty in
properties , residents and identifying development
businesses from known and/or redevelopment
flood hazards ( Primary) opportunities
• Reductions to local May reduce or limit
funding demands for post- potential developmentcompared to that
flood clean up ( Primary) allowed with Options 1 ,
• Minimizes business 2 and 3 ,
related losses ( Primary)
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Option #4 - Benefits and Detriments
( Cont ' d )
PRIMARY BENEFITS DETRIMENTS
• Reduced demands on
emergency response
personnel ( Primary)
• Accommodates the
preservation of river
functions (Secondary)
• Accommodates the
protection of riparian
health and habitat
(Secondary) .
Fit,fly
Economic Analysis
Background
• Based on Council and Public feedback the City hired
Economic & Planning Systems to conduct and Economic
Impact Analysis ( EIA) of the proposed floodplain
regulations
• The complete analysis is available as an attachment to the
Agenda Item Summary (Attachment 9)
• The EIA focuses on four geographic areas selected by the
Economic Health Office due to the opportunity for future
development potential
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Economic Analysis
Methodology
• EPS examined County Assessor parcels along the
Poudre River impacted by the 100-year floodplain
• Special emphasis was placed on four geographic
areas identified by the Economic Health Office
• An estimate of the ( re )development potential of each
area based on current regulations ( Option 3 - No
Change ) forms the baseline from which the economic
impact is estimated
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Economic Analysis
Key Assumptions/Limitations
Any EIA analysis has limitations based on the
assumptions informing the analysis
• The future development potentials is a planning
level estimate over an extended timeframe of up
to 50 years
• The estimate represents the best use
determination of future development based on
existing regulations
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Economic Analysis
Key Assumptions/Limitations (Cont' d )
• The estimated development potential may or may not be
realized due to multiple factors and the actual time period
could be shorter or longer.
• The figures are therefore designed to estimate a maximum
future impact based on current economic conditions, which
may change. It is against this maximum potential that the
impacts from Option 1 and Option 2 are compared .
• No project specific market forecasts therefore no firm
estimate of development by time period
Economic Analysis
Key Assumptions/Limitations (ConLn
• Current market values are applied by land use category to
estimate development values, which form the basis for economic
impacts.
• No actual determination of value for identified development areas,
ownerships, or individual parcels is either offered or implied .
• The actual value of any parcels or sites cannot be determined
without more extensive appraisal work and will depend on
multiple factors, including but not limited to:
- the size of the parcel , shape, access, visibility;
- the willingness to sell ;
- the quality and viability of any existing uses, occupancy
levels, and/or net operating incomes ; and
- larger economic and market conditions present at the time of
sale.
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Economic Analysis
Key Assumptions/Limitations ( Cont ' d )
• In limited cases , the extent of the floodway or
floodplain regulatory change may make new
development or redevelopment unlikely. In these
circumstances the existing land uses would likely
be maintained or if the property is vacant, would
remain undeveloped .
• The lack of development potential does not imply
that the property has no value .
• All economic impacts (direct, indirect, and
induced ) reported represent gross potential
impacts , not " net new" impacts .
f
Economic Analysis
Summary of Findings
• Detailed analysis by area provided in
Attachment 9
• Analysis does not evaluate Option 4 - No
Adverse Impact
• Findings subject to the assumptions and
limitation stated previously
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Economic Analysis
Findings Option 1 — 1 / 10 foot Floodway
• Change in net developable acres = 352 , 000 square
feet in potential development impact
• Approximately $66 . 4 million in development value
• Approximately $ 576 , 000 in annual tax revenue
( Property and Sales Tax)
• One-time impacts to construction industry of $ 79 . 3
million or 665 jobs (direct , indirect , and induced )
• On -going impacts (commercial/retail and office
development) of approximately $ 138 . 5 million or 830
jobs (direct , indirect , and induced )
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Economic Analysis
Findings Option 2 — No Structures in Floodplain
• Change in net developable acres = 1 . 4 million square
feet in potential development impact
• Approximately $253 . 0 million in development value
• Approximately $2 . 5 million in annual tax revenue
( Property and Sales Tax)
• One-time impacts to construction industry of $303 . 4
million or 2 , 540 jobs (direct , indirect , and induced )
• On -going impacts (commercial/retail and office
development) of approximately $644 . 9 million or
3 , 760 jobs (direct , indirect , and induced )
F� [tins
Economic Analysis
Findings Option 4 — No Adverse Impact
• Analysis did not include an estimate of the economic impact of
this option ( requires individualized analysis of each parcel )
• Some may have minor impacts while others may have large
impacts
• In some cases , the commonly used floodplain mitigation
measures may reduce or even eliminate the impact to a
particular process — also mitigating the economic impact
• The feasibility and cost/benefit of mitigation measures should be
evaluated on a case by case basis
Flood Damage Analysis
Background
• The City requested that AMEC prepare a report that
summarizes the economic and other detrimental impacts from
flooding on existing and proposed development in four study
areas along the Poudre River.
• Four geographic areas were selected for analysis :
• Area 1 - A portion of the North College Urban
Renewal Area north of the downtown.
• Area 2 - The Link-N-Green Golf Course
redevelopment parcel near Lincoln/Lemay
• Area 3 - An area east of Lemay Avenue and south of
Mulberry Street
• Area 4 - A portion of WW Reynolds Office Park,
Gateway Medical Clinic, and Neenan
Development offices north and south of East
Prospect Avenue C;tyof
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Flood Damage Analysis
Key Assumptions
• The assessment of future development
potential is based on information provided by
EPS and is a planning level estimate for future
build out over an extended timeframe of up to
50 years .
• Existing damages are based on depths from
FEMA Flood Insurance Study profiles
• Existing damages did not include losses for
floods greater than 100 -Year
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Flood Damage Analysis
Key Assumptions ( Cont ' d )
• Future damages did not quantify or include
damage to buildings , risk to employees or
customers , casualties , emergency services
time/resources and risk, evacuation and rescue
costs , cleanup costs , parking lot damage ,
landscaping damage , vehicles , equipment or
materials stored outside , utility damages
(sewer, water) , road repair, bridge repair.
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Flood Damage Analysis
Key Assumptions
• Existing structure values with assumed
contents values ( 100 % of structure value for
commercial , 50 % of structure for residential ) .
Included business interruption losses , debris
removal costs based on City data , flood
disruption costs , rental income losses , capital
income losses and sales tax reductions .
• Future damages assumed new or substantially=
improved development will conform to local FP
regulations and limit/reduce losses . city of
ollins
Flood Damage Analysis
Key Assumptions ( Cont ' d )
• Future damages include capital -related income
losses of lost services and sales due to
restricted business access , capital -related
income losses of net loss of waters ,
displacement costs for temporary relocation ,
displacement costs for business disruption ,
displacement costs for rental income loss to
building owners , debris removal costs .
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Flood Damage Analysis
Scope of Work
AMEC conducted the flood damage analysis to
determine impacts of flooding on existing and
proposed development based on the three
regulatory options . The following methods were
used to complete the study :
• HAZUS-MH -- FEMA's GIS-based natural hazard loss
estimation tool was used to perform a flood loss
estimation for existing development in the study areas
• Flood impacts to proposed development focused on
flood disruption losses, based on development
projections with estimation based on accepedf
methods and values , r eft Collins
f1
Flood Damage Analysis
Scope of Work ( Cont ' d )
• Proposed development projected building occupancy
and square footage was obtained from the EPS
Economic Analysis to ensure consistency in
development assumptions
• A qualitative discussion was provided of the potential
impacts that were difficult to quantify and
supplements the disruption cost calculations
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Flood Damage Analysis
Estimated Employees within Floodplain
Assuming Maximum Development
Option 1 Option 2 Option 3
Areal 19167 457 19281
Estimated Existing Employees* 335 335 335
Estimated Additional Employees** 832 122 946
Area 2 1 ,869 19304 2,134
Estimated Existing Employees* 240 240 240
Estimated Additional Employees** 1629 1064 1894
Area 3 1 ,690 19232 1 ,872
Estimated Existing Employees* 917 917 917
Estimated Additional Employees** 773 315 955
Area 4 651 417 651
Estimated Existing Employees* 417 417 417
Estimated Additional Employees** 234 0 234
This estimate does not include emergency services workers
*Assuming 4 employees per 1,000 square foot
Assuming Maximum Development ^
Public Safety Considerations
• Options 1 , 2 and 4 offer various regulatory
alternatives to minimizing flood risk .
• Existing properties in the Poudre floodplain
are already at risk.
• Additional development will increase life =
safety risks and property damages when a
flood occurs .
• It is the City' s duty and responsibility to
proactively manage foreseeable risks to
protect current and future citizens from
physical , financial , and emotional impacts of
flooding . F�toll1
General Direction/Specific Questions
1 . Does Council feel that sufficient outreach and
analysis has been provided for them to make
an informed decision regarding the Poudre
River Floodplain Regulations ?
2 . Does Council have comments and/or direction
with regard to the specific options identified ?
1:0t
Poudre River Floodplain Regulations
Potential Revisions
QUESTIONS / FEEDBACK
City of
�t�1