HomeMy WebLinkAboutANGIE LEE PERIODONTICS - FDP - FDP160028 - SUBMITTAL DOCUMENTS - ROUND 1 - EROSION CONTROL LETTER/REPORT1501 Academy Ct. Ste. 203 Fort Collins, Colorado 80524 (970) 530-4044
Erosion Control Report
Angie Lee Periodontics
Fort Collins, CO
Prepared for:
Aspen Summit, LLC
1223 Red Oak Court
Fort Collins, CO 80525
June 22, 2016
1501 Academy Ct. Ste. 203 Fort Collins, Colorado 80524 (970) 530-4044
June 22, 2016
Aspen Summit, LLC.
1223 Red Oak Court
Fort Collins, CO 80525
RE: Angie Lee Periodontics
Fort Collins, Colorado
Project Number: U15013
To Whom It May Concern:
United Civil Design Group, LLC. (United Civil), is pleased to submit this Erosion Control
Report for the Angie Lee Periodontics site located in Fort Collins, Colorado. This report
outlines best management practices (BMPs) to be implemented with the proposed
construction, in order to minimize potential pollutants in stormwater discharges.
As this site is anticipated to disturb less than 1.0 acres of land, a Stormwater Discharge
Permit from the Colorado Department of Public Health and Environment is not
required. However, the site must still comply with City of Fort Collins Erosion Control
Requirements. As such, this report has been prepared to comply with City
requirements.
Please note that this document is intended to be a “living” document which should be
modified and updated through the course of site construction to accurately reflect site
conditions at all times. Pollutant sources should be continuously evaluated, BMP’s
selected, documented, implemented, and pollutant sources re-evaluated. As such, this
version of the Erosion Control Report was prepared to facilitate initial plan approvals
and permitting, but does not necessarily reflect the final version, or the transitions
throughout the construction process. It shall be the responsibility of the Construction
Site Operator and/or the permit holder (or applicant thereof) to ensure the plan is
properly maintained and followed. The Construction Site Operator or Permit Holder for
this project is: ,
and can be contacted at:
Address:
Phone:
If you should have any questions or comments as you review this report, please feel free
to contact us at your convenience.
Sincerely,
Kevin Brazelton, PE
Engineering Manager
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TABLE OF CONTENTS
PAGE
I. Site Location and Description............................................................................................. 1
A. Location.......................................................................................................................... 1
B. Description of Property .................................................................................................. 1
C. Description of Development .......................................................................................... 1
D. Construction Activity Description.................................................................................. 2
E. Proposed Sequence for Major Activities........................................................................ 2
F. Area Estimates................................................................................................................ 2
G. Runoff Coefficient and Soil Description........................................................................ 2
H. Location and Description of Potential Pollution Sources .............................................. 3
I. Non-Stormwater Components of Discharge.................................................................... 5
J.Receiving Waters............................................................................................................. 6
II. BMPs for Stormwater Pollution Prevention ....................................................................... 6
A. Erosion and Sediment Controls...................................................................................... 6
B. Erosion Control Sequencing......................................................................................... 10
C. Materials Handling and Spill Prevention ..................................................................... 12
III. Other Controls................................................................................................................... 13
IV. Final Stabilization and Long-term Stormwater Quality.................................................... 13
V. Inspection and Maintenance Procedures........................................................................... 13
VI. References......................................................................................................................... 15
APPENDICES
APPENDIX A – Erosion Control Plans, and Details
APPENDIX B – Blank Inspection Reports
APPENDIX C – Contractor Inserts (as needed)
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I. Site Location and Description
A. Location
The Angie Lee Periodontics development site (referred herein as ”the site”) is located at
4803 East Boardwalk Drive in the northeast quarter of Section 1, Township 6 North,
Range 69 West of the Sixth P.M., City of Fort Collins, Larimer County, Colorado. The site
consists of approximately 0.53 acres and is bounded by Boardwalk Drive on the east, a
private drive to the north, and existing commercial properties to the south and west.
See the attached Drainage Plan for additional information.
B. Description of Property
The site has a platted area of 0.53 acres, has been subdivided for commercial uses and
has been previously overlot graded and partially seeded.
The following is a summary of the existing conditions of the site:
Ground Cover/Percent Vegetation - The site has been previously overlot graded and
reseeded. Therefore, the existing ground currently consists of native grasses and
weeds with an approximate 80% vegetative density.
Grades – In general, the majority of this area of the site drains from north to south
towards the south property line with grades between 2.0 to 10.0 percent.
Soil Type - According to the NRCS Web Soil Survey, the site consists of Nunn Clay
Loam (Hydrologic Soil Group C).
Utilities - The site has several known utilities located on or adjacent to the property.
These include existing gas, electric, water, and sewer lines running along and down
East Boardwalk Drive and the private drive to the north of the property.
Detention Ponds and Storm Sewer - A regional water quality and detention pond
located south of the site will service the site for both water quality and detention
requirements.
C. Description of Development
The planned development for the site will consist of the following:
• The construction of single-story, office building with a proposed full-buildout
footprint of approximately 7,400 sf (including approximately 3,260 sf of future
office).
• The construction of private drive lane, parking area and sidewalks in support of
the building construction.
• The construction of utilities to support the proposed building including sanitary,
water and storm drainage.
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D. Construction Activity Description
Construction activity (for all phases of construction) includes installation of BMP’s,
demolition, grading, utility (storm sewer, sanitary sewer, and waterline) construction,
parking lot construction, and drainage conveyance construction.
E. Proposed Sequence for Major Activities
The sequence for major construction activities includes the installation of BMP’s, site
demolition activities, grading, major drainage conveyance construction, installation of
storm drain, installation of other utilities (underground water and sanitary services),
final grading of building pad, building construction, final site grading, curb and gutter
installation, asphalt paving, and landscaping.
The following is the expected sequence of phasing for this site.
• Installation of erosion control
• Site demolition activities
• Site overlot grading
• Installation of utilities
• Installation of curb and gutter and sidewalk
• Paving of roads and parking areas
• Installation of permanent landscape vegetation
Infrastructure construction is estimated to begin August 2016 and be completed by May
2017.
F. Area Estimates
The site has a platted area of 0.53 acres. The total area subject to disturbance by
construction of this project is approximately 0.57 acres.
This Erosion Control Report does not include additional offsite area (for staging, material
storage, overburden stockpiles of dirt, borrow areas, etc.) other than that mentioned
above.
G. Runoff Coefficient and Soil Description
Individual basin runoff coefficients as shown in the Angie Lee Periodontics Drainage Plan
are summarized in the table on the following page:
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Developed Conditions Hydrology Summary:
Basin Design
Point
Area
%I C2 C100
Q2 Q100
(acre) (cfs) (cfs)
Proposed Basins
A1 A1 0.04 12% 0.333 0.416 0.04 0.16
A2 A2 0.20 93% 0.915 1.000 0.52 2.00
A3 A3 0.07 90% 0.950 1.000 0.20 0.74
B1 B1 0.10 90% 0.950 1.000 0.26 0.95
OS1 OS1 0.06 8% 0.295 0.368 0.05 0.20
OS2 OS2 0.06 2% 0.250 0.313 0.03 0.15
OS3 OS3 0.07 54% 0.665 0.831 0.14 0.60
Earth Engineering Consultants (EEC), previously completed the geotechnical and
groundwater investigations for the project site and presented the results of this work in
the Subsurface Exploration Report – Angie Lee Periodontics, 4803 East Boardwalk Drive,
Fort Collins, Colorado, EEC Project No. 1152104. According to this report, there are lean
clay soils overlying siltstone/claystone bedrock. Groundwater was observed at depths
of approximately 12 feet below ground surface and bedrock was encountered at depths
between 15 to 25 feet.
According to the NRCS Web Soil Survey, the site consists of Nunn Clay Loam (Hydrologic
Soil Group C). These soils have “Slow infiltration” ratings per the NRCS Web Soil Groups.
H. Location and Description of Potential Pollution Sources
This section focuses on the identification of the potential pollutant sources and briefly
discusses the Best Management Practices (BMPs) that will be used. More information
on the BMP’s utilized on this site is included in the next section “III. BMPs for
Stormwater Pollution Prevention”.
1. All disturbed and stored soils;
It is expected that there will be stockpiles of dirt on the site from the utility installations
and the foundation excavation. For this site, stockpiles should be located in areas
where Silt Fence or Straw wattles may be placed around the individual stockpiles to
contain the runoff (i.e. landscaped or disturbed earth areas).
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2. Vehicle tracking of sediments
It is anticipated that the contractor will access the property from the private drive north
of the site area. A vehicle tracking control pad will be required at the access location
onsite during construction to reduce tracking sediment onto the adjacent streets.
At the end of each workday, the Contractor shall sweep or scrape both the private drive
and East Boardwalk Drive of sediment that may have accumulated during the workday.
3. Management of contaminated soils
There are not any known contaminated soils on the site. However, if the contractor
encounters contaminated soils during the construction process they should stop
construction immediately and notify the appropriate government authorities in
accordance with good construction safety and practice.
4. Loading and Unloading operations
Loading and unloading will take place on the site. Truck access should be limited to the
extent possible to locations within the disturbed limits of the project. BMP’s such as silt
fence in non-paved areas and rock socks in paved areas should be placed to keep
sediment from exiting the disturbed area limits, primarily towards the south as this is
the low side of the site.
5. Outdoor storage activities (building materials, fertilizers, chemicals, etc.)
Storage of onsite materials including building materials, fertilizers, waterline, and
sanitary sewer will be covered and placed on pallets to prevent direct contact with the
ground and potential surface runoff.
6. Vehicle and equipment maintenance
Vehicle and equipment maintenance should be performed offsite or onsite within an
area surrounded by silt fence or straw wattles. Vehicle and equipment maintenance
shall not happen along the adjacent public or private streets. At a minimum, all vehicle
and equipment maintenance shall be performed on the hard surface or gravel areas at
least 50’ from any stormwater feature (i.e. inlet, storm sewer, concentrated runoff,
swale, etc.)
7. Significant dust or particulate generating processes
The Contractor shall comply with applicable air pollution control requirements of the
City of Fort Collins. The Contractor shall take appropriate actions to minimize
atmospheric pollution and take reasonable precautions which shall include, but not be
limited to:
1. The use of water for control of dusts for construction processes such as
demolition, grading, or the clearing of land.
2. Covering, at all times when in motion, open-bodied trucks transporting
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materials likely to give rise to airborne dusts.
3. Require lower speeds for vehicles entering, exiting, and driving within the
project limits to minimize the amount of dust disturbed by moving vehicles.
8. Routine maintenance activities involving fertilizers, pesticides, detergents, fuels,
solvents, oils, etc;
Chemicals, fuels, lubricants, and paints stored on-site will be in water tight containers
and covered as necessary and stored in a bermed area, a storage building, or within a
vehicle to act as secondary containment.
9. On-site waste management practices (waste piles, liquid wastes, dumpsters, etc.);
1. Waste piles should be covered or surrounded by silt fence or straw wattles.
Liquid wastes should be collected and stored in covered containers and
disposed of properly.
2. Solid waste materials, including disposable materials incidental to the major
construction activities, will be collected in on site dumpsters. The containers will
be emptied periodically and trucked away from the site. Dumpsters should
have covers.
10. Concrete truck / equipment washing, including the concrete truck chute and
associated fixtures and equipment;
A dedicated concrete washout area is necessary for this project. The contractor shall
clean out equipment within the washout area so that runoff is not allowed to leave site
and enter the public streets or neighboring properties.
11. Dedicated asphalt and concrete batch plants;
There will not be dedicated asphalt or concrete batch plants on this site.
12. Non-industrial waste sources such as worker trash and portable toilets
Worker’s trash shall be disposed of in an onsite dumpster. The site should be free of
trash at the end of each working day.
Portable toilets shall be utilized by construction personnel and serviced regularly by a
commercial operator. They shall be located a minimum of 5 feet from the curb or 50
feet from inlets. If sanitary facilities are located on a paved surface, toilets shall be
equipped with a containment pan or a secondary containment BMP. Regardless of
location all portable toilets shall be anchored per manufacturer recommendations.
I. Non-Stormwater Components of Discharge
According to the EEC report, groundwater was observed at depths of approximately 12
feet below ground surface. At these depths, it is not expected that groundwater will be
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encountered during construction. However, should groundwater be encountered
during trenching or excavation operations, a temporary sediment/retention basin
should be constructed to store pumped dewatering flows.
The other non-storm water components of discharge include, but are not limited to,
water line flushing, irrigation to establish seeding, and watering for dust mitigation, and
compaction. It is important for the contractor to manage the runoff from these items
utilizing the BMP’s mentioned in this report (i.e. silt fence, straw waddles, concrete
washout areas, surface roughening, etc.).
J. Receiving Waters
The site lies within the Fossil Creek Basin. The vast majority of the proposed site will
drain via overland flow, grass lined swales and storm drains to the existing regional
pond located south of the site. Upon exiting the regional pond, runoff from the basin
empties into a tributary of Fossil Creek and ultimately drains to the Poudre River
through a series of inlets, culverts, and channels.
II. BMPs for Stormwater Pollution Prevention
A. Erosion and Sediment Controls
Once construction activity begins, Best Management Practices (BMP’s) intended to
contain sediment onsite must be constructed, inspected, and repaired as necessary.
Such controls must be functional before upslope land disturbance takes place. The
BMP’s will be installed as shown on the Erosion Control Plan shown in Appendix A. They
must be supplemented as on-site experience proves necessary in order to control
sediment, pollutant discharge, and ensure public safety.
The following temporary and permanent BMP’s will be installed and maintained to
control on-site erosion and prevent sediment from traveling off-site during construction.
Temporary BMP’s
• Construction Fence is a temporary BMP. The contractor is to place construction
fencing around development as needed to limit access by construction equipment
and personal vehicles to designated areas of ingress and egress.
• Inlet Protection is a temporary BMP that helps prevent soil and debris from the site
from entering the storm drain inlets and usually consists of a sediment filter around
or upstream of the storm drain inlet. Inlet protection allows storm water to flow
into the drain but only after excess sediment has been filtered out. Inlet protection
will be used on existing and proposed storm inlets and will be installed at such time
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as construction of the storm sewer system occurs. Inlet protection for this site will
consist of:
• Regular Meetings are a temporary and non-structural BMP. Regular meetings with
on-site workers including builders, suppliers, landscape personnel, etc. should be
conducted so that they are kept up to date with site standard operating procedures.
• Silt Fence is a woven synthetic permeable fabric that filters runoff. Silt fence is a
temporary barrier that is installed prior to earthmoving activities and is placed
downstream of areas where runoff from construction activities is expected to occur,
especially along the site perimeter to allow sediment to settle from runoff before
water leaves the construction site. Silt fences will be installed per manufacturer’s
recommendations. Silt fence encourages sheet flow and is not intended to be used
in areas of concentrated flow. If concentrated flow is encountered during the
placement of the fence, an alternative BMP shall be used and the SWMP should be
updated to reflect this change.
• Staging Areas will be provided during the construction process at least 100’ from
any storm water conveyance. Staging areas include locations for vehicle fueling,
concrete truck washout, material storage and transfer, equipment maintenance and
cleaning, and other construction activities. These areas will be maintained as
isolated locations that allow for contaminants to be concentrated and removed from
the site as necessary. Concrete washout areas shall be designed such that washout
water cannot leave the location, nor shall storm water runoff wash concrete from
the locations.
• Straw Wattles are a temporary BMP that are used for a variety of purposes. They
are used for inlet protection, curbside check dams, swale protection, at the bottom
of slopes, or the limits of property boundaries. They are easy to install and are
increasingly being used for Small Site SWMP’s. The straw wattles, which are meshed
netting “tubes,” filled with straw, excelsior, or coconut fiber. Wattles for swale
protection should be installed following rough grading of channel areas. Wattles
require proper installation and maintenance to ensure their performance.
• Rock Socks are a temporary BMP that are used for a variety of purposes. They are used for
inlet protection, curbside check dams, or at the limits of property boundaries. Rock socks
are wire meshed “tubes” filled with rocks. Rock Socks require proper installation and
maintenance to ensure their performance.
• Street Sweeping and Vacuuming removes sediment that has been tracked onto
roadways to reduce sediment transport into storm drain systems or a surface waterway.
This practice should be used on the adjacent paved road to the construction site. Paved
roads should be inspected on a daily basis and more frequently as needed.
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• Saw Cutting Pollution Prevention prevents dust and slurry from asphalt and concrete
saw cutting activities from migrating into the existing storm drain system. Slurry and
cuttings shall be vacuumed during cutting and surface operations and shall not be allowed
to remain on pavement surface overnight. Collected slurry and cuttings shall be disposed of
in a manner that does not violate groundwater or surface water standards.
• Surface Roughening is provided following grading activities to slow the effects of
wind erosion. Roughening can be used as a temporary BMP and is a technique used
for creating unevenness on bare soil through the construction of furrows (groove
cuts) running across a slope or by utilization of construction equipment to track the
soil surface. The primary function of surface roughening is to reduce erosion
potential by decreasing runoff velocities, reducing the length of sheet flow trapping
sediment, and increasing infiltration of water into the soil.
• Temporary Seeding is the establishment of a temporary vegetative cover on a
graded area that will be exposed for longer 30 days. Temporary seeding can be used
on areas requiring temporary protection that will eventually need permanent
vegetation at the completion of the construction or it can be used for areas that will
be re-disturbed after a period of inactivity. The seed mix 100% smooth brome at a
minimum application rate of 30 pls/lbs/acre. Fertilizer and Mulch shall be included
as specified on the plans.
• Temporary Erosion Control Fabric is comprised of a temporary degradable erosion
control blanket designed to provide immediate erosion protection and vegetation
establishment assistance on moderate slopes and low to medium-flow channels
where bare-ground seeding and loose mulches often fail. Temporary erosion control
blankets are being recommended moderate slopes that do not require permanent
turf reinforcement matting.
• Vehicle Tracking Control is a stabilized stone pad located at points of ingress and
egress on a construction site and acts as a temporary BMP. The stone pad is
designed to reduce the amount of mud transported onto public roads by
construction traffic by removing mud and sediment from the vehicle’s wheels when
it drives over the gravel pad. These areas are limited to the minimum number
necessary to provide functional construction access and are installed prior to grading
activities. Whenever the construction entrance exists onto a public road, the road
shall be cleaned at the end of each day. Vehicle Tracking Control will also be used
on this site at any stockpile area exits.
• Wattle Sediment Protection is a temporary BMP that are typically used as check
structures in areas of concentrated water flow such as swales, grassed waterways,
and down drains. They can be installed in combination with any type of rolled
erosion control blanket or channel liner and function by slowing water velocity,
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settling out sediment, and preventing undermining of the channel lining material.
Wattles for swale protection should be installed following rough grading of channel
areas. Sizing and spacing shall be per manufacturer’s recommendation.
• Wind Borne Sediment and Dust Control measures will be provided during the
construction process to control wind borne sediment. During grading activities,
water will be applied to the disturbed soils for the purpose of maintaining cohesion
with clay type soils and also to meet moisture requirements for compaction of
disturbed soils. Other measures of mitigation for wind erosion may include the
timely installation of seed and mulch following the establishment of final grade, and
the timely installation of pavement following completion of utility trenching
operations and curb construction. Open areas should be kept in a roughened
condition (see Surface Roughening above).
Permanent BMP’s
• Grass-Lined Swales (included as part of permanent seeding or other permanently
stabilized swales) are permanent landscaped channels constructed generally below
grade to convey runoff or channel water to a desired location. The grass-lined areas
allow for infiltration to occur as well as including a flow path across a vegetated
surface slowing the conveyance rate of storm water runoff.
• Permanent Seeding and Planting is the establishment of a permanent perennial
vegetation such as trees, shrubs, vines, grasses/sod, or legumes on exposed areas
for final permanent stabilization in order to provide stabilization of the soil by
holding soil particles in place. These items should be installed as per the approved
Landscape Plan. Soil Amendments shall be incorporated in all landscape areas to a
depth of 6” at a rate of 3 cubic yards per 1000 square feet of area unless 4” of loose
topsoil have been imported onto the site over 4” of loosened subgrade soils.
Permanent Landscaping reduces storm water runoff velocity, maintains sheet flow,
protects the soil surface from erosion, promotes infiltration of runoff, and improves
wildlife habitat.
• Bioretention is a permanent BMP that is engineered to utilize bioretention in a
depressed landscape area design to capture and filter or infiltrate the water quality
capture volume. BMPs that utilize bioretention are frequently referred to as rain
gardens or porous landscape detention areas.
• Preservation of Existing Vegetation should occur where no construction activity is
expected to occur. Preservation of natural vegetation is generally a permanent BMP
and is applicable to construction sites with pre-existing vegetation. Only land
needed for building activities and vehicle traffic needs is to be cleared.
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• Storm Sewer Outlet Protection devices are structurally lined aprons or other energy
dissipating devices placed at the outlets of pipes or paved channel sections. Outlet
protection devices prevent scour at storm water outlets and minimize the potential
of downstream erosion by reducing the velocity of storm water flows. Turf
reinforcement matting will be used downstream of storm sewer outfalls as pipe
outlet protection. Outlet Protection is installed with the storm sewer construction
and serves as a permanent structural BMP.
B. Erosion Control Sequencing
This project will have three distinct erosion control phases. The initial phase will be
installing erosion control items prior to any construction on the site. After the initial
erosion control items have been installed, the next phase will consist of site demolition
and rough grading activities. Following completion of the demolition and rough grading,
construction of the infrastructure (utilities, storm sewer, roads, and development of
landscaped areas) will be conducted. The final stage will include the construction of the
new building and site hard surfaces including roads, driveways, sidewalks and parking
areas. Each of the phases is described below, including necessary erosion control items
An Erosion Control Plan is located in the Appendix that includes the minimum required
BMP’s for the site. This plan should be update, as appropriate, for all BMP’s as they are
constructed/placed within the project site.
Phase 1 – Prior to Construction
• Preserve Existing Vegetation – Before construction commencement, areas that are
not disturbed by construction activity should be preserved as needed with
construction fencing, silt fencing, signage, or other means to keep vehicular traffic
out of the area to be left undisturbed.
• Silt Fence – Before construction commencement, silt fence will be placed
downstream of areas where runoff from construction activities is expected to occur.
• Staging Area – A concrete wash out area, fueling area, and other staging areas will
be provided during the construction process at least 100’ from any storm water
conveyance. A staging area is to be shown on the Erosion Control Plan when its
location is identified.
• Vehicle Tracking Control – Before commencement of construction, vehicle tracking
control shall be placed at the location shown south of the private drive. Any other
points of ingress and egress planned by the contractor and approved by the owner
shall also receive suitable vehicle tracking control BMP's.
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• Construction Fence – Before commencement of construction, construction fence
shall be placed at the contractor’s discretion (or as shown in the plans) to limit
access by construction equipment and personal vehicles to designated areas of
ingress and egress.
Phase 2 – Site Demolition, Site Grading, and Infrastructure Construction
The items installed in Phase 1 shall be in place, functional, and maintained during and
following the site demolition and site grading operations. In addition to those items, the
following BMP’s shall be installed.
• Wind Borne Sediment and Dust Control – Wind borne sediment and dust control
measures should be implemented during grading activities. This will be particularly
important to consider prior to the establishment of seeding.
• Inlet Protection – Wattles will be placed at area inlets located within the site
immediately after the inlet is constructed / installed. Existing inlets shall be
protected prior to heavy equipment staging, demolition, or commencement of
construction activities.
• Swale Protection – Straw wattles and check dams will be placed within the swales
immediately following rough grading. Wattles and check dams shall be placed
across the swale for every 2’ of drop in swale elevation or every 300'.
• Slope Protection – Surface roughening and contour furrows shall occur after rough
grading.
• Permanent Seeding – Permanent seeding or landscaping shall be placed
immediately in areas that are final graded and where little future disturbance is
expected.
• Temporary Seeding – The majority of the landscaped areas will be permanently
seeded or planted. However, if disturbed areas are left without permanent
stabilization 30 days after grading, temporary seeding will be required.
• Outlet Protection– Riprap and/or permanent turf reinforcement matting will be
placed immediately downstream of storm sewer outfalls.
• Concrete Washout Area – Concrete washout areas will be placed prior to, and
maintained during, the completion of concrete work.
• Rock Socks – Rock socks will be placed to replace other inlet protection devices as
required after paving operations have been completed.
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Phase 3 – Building Construction and Parking Area and Sidewalk Construction
This phase will likely begin before the seeding has been established throughout the site,
so it is expected that majority of the BMP’s shown in Phase 1 and Phase 2 will be in
place at the beginning of this phase. As the parking area is paved and seeding is
established there will be previously placed BMP's such as vehicle tracking control
devices and some sections of silt fence that may be removed. There are other items
such as inlet protection, silt fence, and swale protection that may only be removed after
all construction is complete and upstream areas are established.
C. Materials Handling and Spill Prevention
The site development includes appropriate construction staging and stockpile areas
identified on the Erosion Control Plan shown in Appendix A. Stormwater runoff
generated from the staging areas will be routed to a temporary sedimentation area
where runoff will be contained and filtered before being discharged downstream. The
staging/stockpile area(s) may be moved to a location no closer than 100’ from a storm
water conveyance. Vehicle tracking control should be placed at the stockpile area
entrance/exit and silt fence should surround it. If relocated, the Erosion Control Plan
should be updated with the actual location of the stockpile/staging area(s).
Chemicals, fuels, lubricants, and paints stored on-site will be in water tight containers
and covered as necessary and stored in a bermed area, a storage building, or within a
vehicle to act as secondary containment. Storage of onsite materials including building
materials, fertilizers, waterline, sanitary sewer, and storm sewer will be covered and
placed on pallets to prevent direct contact with the ground and potential surface runoff.
Concrete and asphalt batch plants are not anticipated on this site and thus are not
included in this Erosion Control Report.
In the event of a spill or accident, it shall be contained and disposed of so that it will not
flow from the site or soak into the soil. Once construction is completed, concrete waste
and contaminated soil will be disposed of properly. The Construction Site Operator
should be notified of spills.
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III. Other Controls
The following includes other measures to control pollutants:
• Solid waste materials, including disposable materials incidental to the major
construction activities, will be collected in containers. The containers will be emptied
periodically and trucked away from the site. Dumpsters shall have covers.
• Water used to establish and maintain grass, for dust control, and for other purposes
during the construction phase must originate from a public water supply or private well
approved by the Colorado Department of Public Health and Environment unless
otherwise approved.
• Sanitary facilities shall be provided at the site throughout construction activities. They
shall be utilized by construction personnel and serviced regularly by a commercial
operator. They shall be located a minimum of 5 feet from the curb or 50 feet from
inlets and must be anchored. If sanitary facilities are located on a paved surface, a
secondary containment BMP will need to be constructed.
• Access off of paved roads should be limited.
IV. Final Stabilization and Long-term Stormwater Quality
Final stabilization is reached when all soil disturbing activities at the site have been completed
and vegetative cover has been established with a density of at least 70 percent of pre-
disturbance levels or when equivalent permanent erosion reduction methods have been
utilized. Upon final stabilization, temporary BMP’s may be removed, unless they are required
to remain in place for future phasing.
Water quality enhancements are provided in areas where grass-lined swales are provided for
storm water conveyance. The soft bottom/overbank areas allow for infiltration to occur as well
as including a flow path across a vegetated surface slowing the conveyance rate of storm water
runoff.
V. Inspection and Maintenance Procedures
Upon completion of each phase of construction, appropriate measures shall be taken to inspect
and maintain existing erosion control features, as described herein or per manufacturers
specifications (whichever is more stringent) and install new erosion control elements associated
with each phase of construction.
The temporary BMP’s will be inspected and documented at a minimum of once every 14 days
and after each precipitation or snowmelt event. The Erosion Control Report will be kept up-to-
Erosion Control Report
Angie Lee Periodontics
Fort Collins, CO
14 U15013-Erosion Control Report.docx
date with inspection records, maintenance procedures, and changes. Records should include
complete inspection reports for each inspection, maintenance, and/or repair. A record-keeping
system is recommended in managing inspection and maintenance reports and should include
all maintenance records, spill response, weather conditions, training, correspondence, etc. A
blank copy the CDOT Stormwater Field Inspection Report is provided in Appendix B.
Preventative maintenance also involves the regular inspection and testing of equipment, timely
maintenance of the equipment, and complete records of the maintenance and inspections of
the equipment. The maintenance and inspection records should be kept on site and made
available upon request.
Inspections must include the observation of the construction site perimeter, runoff discharge
points, disturbed areas, staging areas (including concrete washout areas and fueling areas),
erosion and sediment control measures identified in this Erosion Control Report, and any other
structural BMP’s that may require maintenance. The inspection must determine if there is
evidence of or potential for pollutants to enter the drainage system and if they should be
modified, replaced, or added to.
The following list includes some recommended maintenance procedures:
• Erosion and sediment control measures determined, upon inspection, to be in need of
repair shall be maintained before the next anticipated storm event or as necessary to
maintain continued effectiveness of erosion and sediment control measures. If it is
impractical to maintain erosion and sediment control measures before the next storm
event, maintenance should be accomplished as soon as practical.
• Locations where vehicles enter or exit the site shall be inspected for evidence of sediment
being tracked off-site by construction traffic. Such sediment shall be removed before it can
be conveyed to the receiving storm drains or creeks.
• Seeded areas will be checked to see that grass coverage is maintained. Areas will be
watered, fertilized, and reseeded as needed.
• It is the responsibility of the Site Operator to maintain effective pollutant discharge
controls. Actual physical site conditions or contractor practices could make it necessary to
install more control than are shown on the Erosion Control Plan. For example, localized
concentrations of surface runoff or unusually steep areas could require additional erosion
control devices. Assessing the need for, and implementing additional controls will be a
continuing aspect of the Erosion Control ReportP until final stabilization. This plan intends
to control water-borne and liquid pollutant discharges by some combination of
interception, filtration, and containment. Parties implementing this plan must remain alert
to the need to periodically refine and update the plan in order to accomplish the intended
goals.
Erosion Control Report
Angie Lee Periodontics
Fort Collins, CO
15 U15013-Erosion Control Report.docx
• Sediment that has escaped the construction site must be removed at a frequency sufficient
to minimize off-site impacts.
VI. References
1. Final Drainage Summary for Angie Lee Periodontics, United Civil Design Group, June 22, 2016.
2. Natural Resources Conservation Service Web Soil Survey at
www.websoilsurvey.nrcs.usda.gov/app.
3. Subsurface Exploration Report, Angie Lee Periodontics, 4803 East Boardwalk Drive, Fort Collins,
Colorado, Earth Engineering Consultants, November 2, 2015.
4. Fort Collins Stormwater Criteria Manual, City of Fort Collins, Colorado, as adopted by Ordinance
No. 174, 2011, and referenced in Section 26-500 (c) of the City of Fort Collins Municipal Code.
5. Urban Storm Drainage Criteria Manual, Volumes 1-3, Urban Drainage and Flood Control
District, Wright-McLaughlin Engineers, Denver, Colorado, Revised April 2008.
6. State of Colorado, Stormwater Discharges Associated with Construction Activity, Stormwater
Management Plan Preparation Guides, www.colorado.com.
APPENDIX A
• Grading and Erosion Control Plan (Map Pocket)
• Erosion Control Details (Map Pocket)
DS
DS
DS
DS
EXISTING BUILDING EXISTING BUILDING
EAST BOARDWALK DRIVE
PRIVATE DRIVE
PHASE 2 BUILDING
PROPOSED BUILDING
FFE=5001.50
4.0:1
3.0:1
2.2%
2.2%
3.5%
4.3%
3.3%
2.3%
2.0%
2.0%
9.7%
11.0%
15.9%
8.9%
4.6%
5.8%
3.0%
PROPERTY BOUNDARY
(TYP.)
2.6%
FLUSH CURB
3.9%
EXISTING 12" RCP
STORM SEWER
PROPOSED ROOF DRAIN
(SEE UTILITY PLAN)
6" UNDERDRAIN
(SEE DETAILS)
EXISTING DOWNSPOUT (TYP.)
BIORETENTION SAND MEDIA
(SEE DETAILS)
5'
15' DRAINAGE &
UTILITY EASEMENT
GRADE BREAK
LANDSCAPE WALL
(SEE LANDSCAPE PLANS)
TOP OF WALL = 4997.45
PROPOSED POND
OUTLET STRUCTURE
(SEE DETAILS)
GRATE = 4997.15
PLACE FINISHED GRADE
AT SOUTH EDGE OF
FUTURE BUILDING
AT 4997.50
1.8%
2.7%
3.2%
1.5%
ASPEN SUMMIT LLC 06/22/16
U15103
1" = N/A
VERTICAL: 1" = N/A
HORIZONTAL:
ANGIE LEE PERIODONTICS
6/20/2016 2:23:20 PM
P:\U15013 - 4803 BOARDWALK OFFICE\CADD\CP\C6.00_DETAILS.DWG
C6.00_DETAILS
KRB SDR
C603
12
CONSTRUCTION DETAILS
PREPARED FOR:
JOB NUMBER
SHEET NUMBER
OF SHEETS
DATE SUBMITTED:
The engineer preparing these plans will not be responsible
for, or liable for, unauthorized changes to or uses of these
plans. All changes to the plans must be in writing and
must be approved by the preparer of these plans.
NO. BY DATE
CAUTION
REVISIONS:
VERTICAL:
HORIZONTAL:
SCALE
PRELIMINARY
PLANS
NOT FOR CONSTRUCTION
1501 Academy Ct.
Ste. 203
Fort Collins, CO 80524
(970) 530-4044
www.unitedcivil.com
Civil Engineering &
Consulting
UNITED CIVIL
Design Group
PROJ. MGR:
DRAWING NAME:
PATH:
DATE: TIME: DESIGNER:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
APPROVED:
WATTLE INSTALLATION DETAIL
NOT TO SCALE
2
C603
ROCK SOCK
NOT TO SCALE
1
C603
SF
APPROVED:
ASPEN SUMMIT LLC 06/22/16
U15103
1" = N/A
VERTICAL: 1" = N/A
HORIZONTAL:
ANGIE LEE PERIODONTICS
6/20/2016 2:23:22 PM
P:\U15013 - 4803 BOARDWALK OFFICE\CADD\CP\C6.00_DETAILS.DWG
C6.00_DETAILS
KRB SDR
C604
12
CONSTRUCTION DETAILS
PREPARED FOR:
JOB NUMBER
SHEET NUMBER
OF SHEETS
DATE SUBMITTED:
The engineer preparing these plans will not be responsible
for, or liable for, unauthorized changes to or uses of these
plans. All changes to the plans must be in writing and
must be approved by the preparer of these plans.
NO. BY DATE
CAUTION
REVISIONS:
VERTICAL:
HORIZONTAL:
SCALE
PRELIMINARY
PLANS
NOT FOR CONSTRUCTION
1501 Academy Ct.
Ste. 203
Fort Collins, CO 80524
(970) 530-4044
www.unitedcivil.com
Civil Engineering &
Consulting
UNITED CIVIL
Design Group
PROJ. MGR:
DRAWING NAME:
PATH:
DATE: TIME: DESIGNER:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
APPROVED:
CWA
VEHICLE CONTROL TRACKING PAD
NOT TO SCALE
CONCRETE WASHOUT AREA
NOT TO SCALE
1
C604
2
C604
VTC
APPENDIX B
Blank Erosion Control Inspection Reports
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COLORADO DEPARTMENT OF TRANSPORTATION
STORMWATER FIELD INSPECTION REPORT - POST CONSTRUCTION
(1) Project Name:
(6) CDOT Project Number:
(7) Project Code (Sub Account #): (9) CDOT
Region:
(2) Maintenance Patrol/Representative: (3) SWMP Administrator:
(8) CDPS-SCP Certification#:
(4) Inspector(s) (Name and Title):
(10) Date of Project Inspection:
(5) Weather at Time of Inspection:
(11) REASON FOR INSPECTION / EXCLUSION
❑ 30 Calendar day:
❑ Third Party Request:
❑ Winter Conditions Inspections Exclusion: Inspections are not required at sites where snow cover exists over the entire site for an extended
period, and melting conditions posing a risk of surface erosion do not exist. This exception is applicable only during the period where melting
conditions do not exist. If visual inspection of the site verifies that all of these conditions are satisfied, document the conditions in section 17 (General
Notes) and proceed to section 18 (Inspection Certification). Documentation must include: dates when snow cover occurred, and date when melting
conditions began.
❑ Other:
(12) SWMP MANAGEMENT (13) DESCRIPTION OF PROJECT:
Yes No NA
(a) Are changes to the SWMP documents noted
and approved?
(b) Are the 30 day inspection reports retained with
the SWMP notebook?
(c) Are corrective actions from the last inspection
completed?
(14) BMPs ON SITE AT TIME OF INSPECTION *See Inspection Report Instructions for more detail.
Installed Installed Installed Installed
Check Dams* ❑ Seeding ❑ Inlet Protection* ❑ Other: ❑
Embankment Protector ❑ Mulching/Mulch Tackifier ❑ Outlet Protection* ❑ Other: ❑
Sediment Basin/
Detention Pond ❑ Soil Retention Blankets ❑ Other: ❑ Other: ❑
(15) CONSTRUCTION SITE ASSESSMENT & CORRECTIVE ACTIONS **Off site Pollutant Discharges are a Violation of the Permit**
The construction site perimeter and revegetated areas that are exposed to precipitation shall be inspected for erosion and the
evidence of, or the potential for, pollutants leaving the CDOT right of way, entering the stormwater drainage system, or discharging
to state waters. If there is evidence of sediment or other pollutants discharging from the site, see section 16 (Construction Site
Assessment).
All erosion and sediment control practices identified in the SWMP shall be evaluated to ensure that they are maintained and
operating correctly. Identify the condition of the BMP, using more than one letter if necessary: (I) Incorrect Installation; (M)
Maintenance is needed; (F) BMP failed to operate; (A) Additional BMP is needed; (R) Remove BMP. Keep copies of this blank page
for additional room if needed.
Continuous maintenance is required on all BMPs. BMPs that are not operating effectively, have proven to be inadequate, or
have failed must be addressed as soon as possible, immediately in most cases.
Location BMP Condition
Date
Completed
& Initials
Comments:
Description of Corrective Action and Preventative Measure
Taken (Include Picture #)
page 1 of 4 CDOT Form #1177 3/08
(15) CONSTRUCTION SITE ASSESSMENT & CORRECTIVE ACTIONS (continued)
Location BMP Condition
Date
Completed
& Initials
Comments:
Description of Corrective Action and Preventative Measure
Taken (Include Picture #)
(16) CONSTRUCTION SITE ASSESSMENT:**OFF SITE POLLUTANT DISCHARGES ARE A VIOLATION OF THE PERMIT**
(a) Is there evidence of discharge of sediment or other pollutants from the site? ❑ Yes ❑ No
*If yes, explain the discharge and the corrective actions in section 15 (Construction Site Assessment & Corrective Actions)
or section 17 (General Notes).
(b) Has sediment or other pollutants discharging from the site reached state waters? ❑ Yes ❑ No
*If yes, see subsection 208.03(c) and Part II A.2 and 3 of the permit for reporting requirements.
(c) Is the amount of vegetation 70% of pre-existing vegetative cover? ❑ Yes ❑ No
*If yes, notify the appropriate Region Environmental contact.
(17) GENERAL NOTES
Corrective action(s) has been taken, or where a report does not identify any incidents requiring corrective action, the report shall
contain a signed statement indicating the site is in compliance with the permit to the best of the signer’s knowledge and belief.
CDOT Maintenance/SWMP Administrator (Signature Required) Date:
(19) COMPLIANCE CERTIFICATION
page 2 of 4 CDOT Form #1177 3/08
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that
there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing
violations.
(18) INSPECTION CERTIFICATION
CDOT Maintenance/SWMP Administrator (Signature Required) Date:
Stormwater Management Field Inspection Report Instructions
State waters are defined to be any and all surface and subsurface waters which are contained in or flow through the state, including, streams,
rivers, lakes, drainage ditches, storm drains, ground water, and wetlands, but not including waters in sewage systems, waters in treatment
works or disposal systems, waters in potable water distribution systems, and all water withdrawn for use until use and treatment have been
completed. (Per subsection 107.25 and 25-8-103 (19) CRS)
(3) SWMP Administrator: Indicate the name of the individual(s) responsible for implementing, maintaining, and revising SWMP.
(8) CDPS-SCP Certification #: Indicate the Colorado Discharge Permit System (CDPS) Stormwater Construction Permit (SCP) (for Stormwater
Discharges Associated with Construction Activities) certification number, issued by CDPHE, for the project which the report is being completed.
Certification number can be found on the first page of the SCP.
(11) Reason(s) for Inspection or Exclusion: Indicate the purpose for the inspection or exclusion. These inspections are required to comply
with the CDOT Specifications and the CDPS-SCP.
❑ 30 Calendar Day. For sites where construction activities are completed. The permittee shall make a thorough inspection of the stormwater
management system every thirty days; post-storm event inspections are not required.
❑ Third Party Request. Indicate the name of the third party requesting the inspection and, if known, the reason the request was made.
❑ Winter Conditions Inspections Exclusions. See Page 1 for definition. An inspection does not need to be completed, but use this form to
document the conditions that meet the Exclusion.
❑ Other. Specify any other reason(s) that resulted in the inspection.
(12) SWMP Management: Review the SWMP records and documents and use a ✔ to answer the question. To comply with CDOT Standard
Specifications and the CDPS-SCP, all of the items identified must be adhered to. If No is checked, document the reason and indicate the
necessary corrective action in section 15 (Construction Site Assessment & Corrective Actions). If NA is checked, indicate why in the space
provided or indicate in section 17 (General Notes).
(a) Are changes to the SWMP noted and approved on the plans? Indicate all changes that have been made to any portion of the SWMP
notebook documents during inspections. Changes shall be dated and signed at the time of occurrence. Amendments may include items listed
in subsection 208.03(c).
(b) Are 30 day inspection reports retained with the SWMP? The SWMP Administrator shall keep a record of inspections. Inspection reports
must identify any incidents of non-compliance with the terms and conditions of CDOT specifications or the CDPS-SCP. Inspection records
must be retained for three years from expiration or inactivation of permit coverage.
(c) Are corrective actions from the last inspection completed? Have corrective actions from the last inspection been addressed? Is a descrip-
tion of the corrective action(s), the date(s) the corrective action(s) was taken, and measure(s) taken to prevent future violations (including
changes to the SWMP, as necessary) documented?
(13) Description of Project Activities: Provide a short description of the original construction project.
(14) BMPs On Site at Time of Inspection: Indicate the BMPs that are installed on-site at the time of inspection. Indicate by placing a ✔ in the
Installed column. All BMP details (e.g., Standard Plan M-208-1) shall be included with the SWMP documents.
-Check Dams (e.g., rock check, erosion logs, erosion bales, silt berms, etc.)
-Embankment Protector (e.g., slope drains, open-chute drains, etc.)
-Inlet Protection (e.g., erosion logs, erosion bales, sand bags, gravel bags, etc.)
-Outlet Protection (e.g., riprap, erosion log around top of headwall, etc.)
-Other: Provide a description of a BMP implemented on site that is not listed above.
(15) Construction Site Assessment & Corrective Actions: Inspect the construction site and indicate where BMP feature(s), identified in
section 14 (BMPs On Site at Time of Inspection), require corrective action. Erosion and sediment control practices identified in the SWMP shall
be evaluated to ensure that they are operating correctly.
- Location. Site location (e.g., project station number, mile marker, intersection quadrant, etc.)
- BMP. Indicate the type of BMP at this location that requires corrective action (e.g., silt fence, erosion logs, soil retention blankets, etc.).
- Condition. Identify the condition of the BMP, using more than one letter (identified in section 15) if necessary.
- Description of Corrective Action and Preventative Measure Taken. Provide the proposed corrective action needed to bring the area or BMP
into compliance. Once corrective actions are completed, state the measures taken to prevent future violations and ensure that the BMPs are
operating correctly, including the requisite changes made to the SWMP. If pictures were taken, indicate the photo number (if in digital format).
- Date Completed & Initials. Date and initial when the corrective action was completed and the preventative measure statement finished. If
confirmation that the item was completed is sent via email, print out and attach it to this inspection form.
(16) Construction Site Assessment: Was there any off site discharge of sediment at this site since the last inspection?
(a) Is there evidence of discharge of sediment or other pollutants from the site? Off site pollutant discharges are a violation of the permit.
The construction site perimeter, all areas exposed to precipitation, and discharge locations shall be inspected for evidence of, or the potential
for, pollutants leaving the construction site boundaries, entering the stormwater drainage system, or discharging to state waters.
(b) Has sediment or other pollutants discharging from the site reached state waters? Off site pollutant discharges are a violation of the
permit. If off site discharge has occurred, explain the discharge and the corrective actions in section 15 (Construction Site Assessment &
Corrective Actions) or section 17 (General Notes).
(c) Is the amount of vegetation 70% of pre-existing cover? Has uniform vegetative cover been established with a density of at least 70 percent
of pre-disturbance levels? If yes, the permit may be inactivated, notify the Region Environmental contact for verification.
(17) General Notes: Indicate any additional notes that add detail to the inspection, this may include positive practices noted on the project.
(18) Inspection Certification: In accordance with Part I, F.1.c of the CDPS-SCP, all reports for submittal shall be signed and certified for
(15) CONSTRUCTION SITE ASSESSMENT & CORRECTIVE ACTIONS (continued) **Off site Pollutant Discharges are a Violation of the Permit**
The construction site perimeter and revegetated areas that are exposed to precipitation shall be inspected for erosion and the evidence of, or the
potential for, pollutants leaving the CDOT right of way, entering the stormwater drainage system, or discharging to state waters. If there is evidence of
sediment or other pollutants discharging from the site, see section 16 (Construction Site Assessment).
All erosion and sediment control practices identified in the SWMP shall be evaluated to ensure that they are maintained and operating correctly. Identify
the condition of the BMP, using more than one letter if necessary: (I) Incorrect Installation; (M) Maintenance is needed; (F) BMP failed to operate; (A)
Additional BMP is needed; (R) Remove BMP. Keep copies of this blank page for additional room if needed.
Continuous maintenance is required on all BMPs. BMPs that are not operating effectively, have proven to be inadequate, or have failed must be
addressed as soon as possible, immediately in most cases.
Location BMP Condition
Date
Completed
& Initials
Comments:
Description of Corrective Action and Preventative Measure
Taken (Include Picture #)
page4 of 4 CDOT Form #1177 3/08
APPENDIX C
Contractor Inserts (as needed)
accuracy.
(19) Compliance Certification: In accordance with Part I, D.6.b.2.viii of the CDPS-SCP, compliance shall be certified through signature.
page3 of 4 CDOT Form #1177 3/08
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SURFACE ROUGHENING
NOT TO SCALE
3
C604
DATE:
DRAWN BY:
12/27/00
NBJ
FLOW
APPROVED:
DATE:
DRAWN BY: NBJ
11-29-2000
APPROVED:
DATE:
DRAWN BY:
01/03/01
NBJ
IP
3.1%
GRADE BREAK
2.1%
2.1%
GRADE BREAK
4.2:1
3.2:1
4.5:1
6.0:1
5.0:1
PROVIDE 1' WIDE BERM
BETWEEN TOP OF POND
(97.50) AND TOP OF WALL
2.5%
4.5%
2.0%
2.8%
MATCH EXISTING
CURB AND GUTTER
MATCH EXISTING CURB,
GUTTER & SIDEWALK
MATCH EXISTING
SIDEWALK
T
T
T
T
T
MATCH EXISTING
CONCRETE PAN
98.28
97.50
1.26
98.34
95.79
0.37
0.45
96.49
94.51
0.92 HP
1.16
96.36 94.57
1.03
0.84
1.26
1.31 HP
97.85
97.81
97.64
97.98
97.86
97.78
97.63
97.87
98.02
98.52
97.93
97.85
97.87
98.35
98.43
98.42
98.41
98.50
0.23
0.80
0.80
0.48
99.72
99.56
0.07
99.66
99.92
0.92
1.06
1.40
1.40 1.50 FG
1.50 FG
1.27 FG
1.50 FG
1.50 FG
1.50 FG
1.30 TBC
0.95
0.80
1.44
1.15
1.21
1.20 FG
1.50 FG
1.00 FG
1.50 FG
1.40
1.15
1.00 FG
1.00 FG
0.79
1.00 FG
97.23
96.78
96.64
97.50
97.50
97.45
97.45
97.50 95.95
95.95
96.45
97.45
97.50
96.69
98.98
0.69
0.51
1.15
0.82
0.84
0.75
1.10
0.98
1.57 1.06
1.58
1.11
1.02
0.63
0.87
0.67
96.69
96.41
96.40
1.40 FG
0.82
1.50 FG
99.41
99.08
98.94
99.41
PROPOSED STEPS
(4) 6" RISERS
1.41
1.41
PROPOSED STEP
(1) RISER
PROPOSED STEP
(1) 6" RISER
1.00 FG
1.50 FG
1.00 FG
PROPOSED
SWALE
0.95
98.32
EXPOSE SIDEWALK
(6" MAX. EXPOSURE)
EXPOSE CURB
(6" MAX. EXPOSURE)
95.20
96.13
GRADE SWALE ALONG
PROPERTY LINE
96.55
96.41
96.27
1' SIDEWALK CHASE
5'X5' TURF
REINFORCMENT MAT
(SEE NOTE 7)
4'X4' TURF
REINFORCMENT MAT
(SEE NOTE 7)
5'X10' EROSION
CONTROL BLANKET
(SEE NOTE 7)
ASPEN SUMMIT LLC 06/22/16
U15103
1" = ##'
VERTICAL: 1" = N/A
HORIZONTAL:
ANGIE LEE PERIODONTICS
NORTH
6/20/2016 2:38:39 PM
P:\U15013 - 4803 BOARDWALK OFFICE\CADD\CP\C4.00_GRADING-EROSION PLAN.DWG
C4.00_GRADING-EROSION PLAN
KRB SDR
C400
12
GRADING & EROSION CONTROL PLAN
0 10' 20'
SCALE: 1" = 10'
5'
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
APPROVED:
LEGEND
NOTES
1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO
THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH
INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE
DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR
TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS.
2. SPOT ELEVATIONS SHOWN ARE TO FLOWLINE OR EDGE OF WALK UNLESS OTHERWISE NOTED.
3. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS.
4. NOTE THAT THE FINISHED FLOOR ELEVATION AS SHOWN ON THIS DRAWING CORRESPONDS TO ELEVATION 100'-0" AS
SHOWN ON THE ARCHITECTURAL PLANS.
5. THE FINISHED FLOOR ELEVATIONS SHOWN ARE THE MINIMUM ELEVATIONS REQUIRED FOR PROTECTION FROM THE
100-YEAR STORM.
6. CONTRACTOR SHALL NOTE THAT OVEREXCAVATION IS REQUIRED UNDER THE BUILDING PAD (A MINIMUM OF 5-FEET) AND
UNDER SITE PAVEMENTS (A MINIMUM OF 2-FEET). CONTRACTOR SHALL REFER TO THE GEOTECHNICAL REPORT
PROVIDED BY EARTH ENGINEERING CONSULTANTS FOR MORE INFORMATION.
7. TEMPORARY EROSION CONTROL BLANKETS (ECB) SHALL BE NORTH AMERICAN GREEN ERONET S75 OR APPROVED
EQUAL. PERMANENT REINFORCEMENT MAT (TRM) SHALL BE NORTH AMERICAN GREEN VMAX SC250 OR APPROVED
EQUAL.
PROPOSED SLOPE
90.30
PROPOSED SPOT ELEVATION
FF=FINISHED FLOOR
FG=FINISHED GRADE
HP=HIGH POINT
LP=LOW POINT
TC=TOP OF CURB
TOW=TOP OF WALL
3.13
EXISTING GRADE
SILT FENCE
ROCK SOCK
EXISTING CONTOUR
PROPOSED CONTOUR
LIMITS OF DISTURBANCE
EXISTING CURB & GUTTER
EXISTING CONCRETE
PAVEMENT OR SIDEWALK
EXISTING RIGHT-OF-WAY LINE
EXISTING LOT LINE
EXISTING FENCE
EXISTING PAVEMENT STRIPING
PROPOSED CONCRETE
PAVEMENT OR SIDEWALK
PROPOSED CURB & GUTTER
PROPOSED BUILDING
EXISTING EASEMENT
PROPOSED PAVEMENT STRIPING
WATTLE DIKE
RIPRAP
EROSION CONTROL NOTES
1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS.
2. REFER TO SHEET C001 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES.
3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS.
4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT
RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL
ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED.
5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL
MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS
MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE
WASHOUT, AND SEDIMENT TRAP.
6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS
PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED
SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132.
7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE
SITE SHALL BE SEEDED WITH 100% SMOOTH BROME AT A MINIMUM APPLICATION RATE OF 30 PLS/LBS/ACRE.
8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED:
INGREDIENT % AVAILABLE BY
WEIGHT
APPLICATION RATE IN
LBS/ACRE
VEHICLE TRACKING
CONTROL PAD
DROP INLET
PROTECTION
SURFACE ROUGHENING
(SEE EROSION
CONTROL NOTE 4)
EROSION CONTROL
BLANKET (SEE NOTE 7)
TURF REINFORCEMENT
MAT (SEE NOTE 7)
INFLOW CURB & GUTTER
T CURB & GUTTER TRANSITION
EXISTING WATER
EXISTING SANITARY
EXISTING TELECOM
EXISTING FIBER OPTIC
EXISTING ELECTRIC
EXISTING STORM SEWER
EXISTING GAS
PREPARED FOR:
JOB NUMBER
SHEET NUMBER
OF SHEETS
DATE SUBMITTED:
The engineer preparing these plans will not be responsible
for, or liable for, unauthorized changes to or uses of these
plans. All changes to the plans must be in writing and
must be approved by the preparer of these plans.
NO. BY DATE
CAUTION
REVISIONS:
VERTICAL:
HORIZONTAL:
SCALE
PRELIMINARY
PLANS
NOT FOR CONSTRUCTION
1501 Academy Ct.
Ste. 203
Fort Collins, CO 80524
(970) 530-4044
www.unitedcivil.com
Civil Engineering &
Consulting
UNITED CIVIL
Design Group
PROJ. MGR:
DRAWING NAME:
PATH:
DATE: TIME: DESIGNER:
PROJECT: ANGIE LEE PERIODONTICS
BEST MANAGEMENT PRACTICE ITEM:
PRESERVE EXISTING VEGETATION
SILT FENCE
VEHICLE TRACKING CONTROL
STAGING AREAS
CONCRETE WASHOUT AREA
SWALE AND SLOPE PROTECTION
SIDEWALK CHASE FILTER (RS)
1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF
CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS.
2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMP'S.
MOBILIZATION DEMOLITIONUTILITY
INSTALLATION
BUILDING
CONSTRUCTION
SITE GRADING
& PAVING
FINAL
LANDSCAPING
& STABILIZATION
PHASE OF
CONSTRUCTION
EROSION CONTROL SEQUENCING