HomeMy WebLinkAboutFOOTHILLS MALL REDEVELOPMENT, MULTI-FAMILY - FDP - FDP150048 - REPORTS - EROSION CONTROL LETTER/REPORTFOOTHILLS MALL MULTI-FAMILY
EROSION CONTROL REPORT
PREPARED FOR
McWhinney Real Estate Services Inc.
Loveland, Colorado
PREPARED BY
Olsson Associates
5285 McWhinney Boulevard, Suite 160
Loveland, CO 80538
January 2016
Olsson Associates Project No. 015-0720
Erosion Control Report
Foothills Mall Multi-Family 015-0720
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Table of Contents
1.0 Site Description ................................................................................................................. 1
1.1.1 Site Location ..................................................................................................... 1
1.1.2 Nature of Construction ...................................................................................... 1
1.1.3 Existing Site Conditions ..................................................................................... 1
1.1.4 Soils .................................................................................................................. 1
1.1.5 Drainage Patterns ............................................................................................. 1
1.1.6 Proposed Sequence for Major Activities ............................................................ 2
2.0 Stormwater Management Controls .................................................................................... 3
2.1.1 Administrator ..................................................................................................... 3
2.1.2 Materials on site ................................................................................................ 3
2.1.3 Potential Pollutants ............................................................................................ 5
2.1.4 Non-Stormwater Discharges ............................................................................. 7
2.1.5 Materials Handling and Spill Prevention ............................................................ 8
2.1.6 Waste Management and Materials Handling ....................................................10
3.0 Best Management Practices ............................................................................................ 13
3.1.1 Purpose ............................................................................................................13
3.1.2 Description and Maintenance ...........................................................................13
3.1.3 Phasing and Sequencing ..................................................................................13
4.0 Final Stabilization ............................................................................................................. 14
4.1.1 Purpose ............................................................................................................14
4.1.2 Site Specific Re-Vegetation Plan ......................................................................14
4.1.3 Post-Construction BMPs ..................................................................................14
Attachments
• NRCS Soils Report
• Erosions and Sediment Control Plans
• Drainage Map
1.0 SITE DESCRIPTION
1.1.1 Site Location
This site is located within a portion of the Foothills Mall Redevelopment Planning Area 3 (Lots
3, 4, 5, and 6 of Foothills Mall Redevelopment)
The approximate center of the site is located at the following coordinates:
Degrees Minutes Seconds
Latitude 40 32 34
Longitude -105 04 13
1.1.2 Nature of Construction
The proposed Foothills Mall Multi-Family project is located on Lots 3, 4, 5 and 6 of the Foothills
Mall Redevelopment Subdivision. The 11.93-acre site is bounded by Stanford Road on the
east, the Foothills Mall on the west and the Thunderbird Estates Subdivision on the north.
There are 19 buildings proposed, with a total of 402 units. The project will provide off-street
parking spaces and garage spaces. Access points into each lot is via the internal access road
being utilized for the mall. The buildings will be two and three stories in height.
1.1.3 Existing Site Conditions
The Contractor is responsible for taking pre-disturbance photos.
1.1.4 Soils
See attached NRCS Soil Report conducted for the area of interest.
1.1.5 Drainage Patterns
Drainage patterns for the proposed condition will remain largely unchanged relative to the
existing patterns.
1.1.5.1 Pre-Construction Drainage Patterns
Stormwater runoff generated on the existing site sheet flow from the north and south to the
northeast corner of the mall.
1.1.5.2 Post Construction Drainage Patterns
Olsson completed an analysis of the drainage design for Lot 3, 4, 5, and 6 of Foothills Mall
Redevelopment to determine the changes from the original to the proposed design. The original
design is defined within the following drainage report: Storm Water Management Plan for
Foothills Redevelopment, prepared by R.A. Smith National, dated Revised December 5, 2013
(existing drainage report).
The lots fall within Basin 25 of the Existing Drainage Report. The percent imperviousness of the
proposed design was calculated to be 65 percent. In addition, the runoff for original design was
intended to drain to sand filters and rain gardens within the Foothills Mall Redevelopment: Sand
Filters SF-1.0, SF-2.0, and SF-4.0; and Rain Gardens RG-29 and RG-31. These drainage
systems have been designed per the existing drainage report and are being constructed as part
of the Foothills Redevelopment Planning Area 2 Final Plans. Based on the analysis a rain
garden, RG-33, will be provided in the northeast corner of Lot 3 meeting the original intent.
1.1.5.3 Receiving Body of Water(s)
Stormwater is conveyed via sheet flow and gutter flow across the entire site into one of the six
detention basins that occupy the site. Once runoff is gathered and treated in one of the six
basins it is the conveyed to the NE corner of the site and enters an unnamed ditch. The
unnamed ditch is a part of the Foothills Basin. The unnamed ditch conveys the runoff all the way
to Fossil Creek Reservoir where it is then discharged into the Cache La Poudre River.
1.1.6 Proposed Sequence for Major Activities
See Erosion and Sediment Control Plan for proposed sequence of major activities for
construction.
2.0 STORMWATER MANAGEMENT CONTROLS
2.1.1 Administrator
TO BE DETERMINED
Contact info:
Name
Phone
Email:
Fax:
2.1.2 Materials on site
The following is an inventory of potential materials that will be on site during construction.
These materials have potential pollutants that can become pollutants associated with
stormwater discharge. The table below shows the materials, potential pollutants associated
with the materials and the BMP(s) that will be used on site to eliminate the possible
discharge of pollutants. Please note that some of the BMPs are considered administrative (or
non-structural) in that they are more concerned with proper guidance and education with on-site
staff, while the other BMPs are structural.
Note to SWMP Administrator: The populated list below will serve as an initial
guidance to the potential on site material and the potential pollutants associated
with those materials. The list also provides BMPs (structural and non-structural)
for the associated pollutants. However, it is the responsibility of the SWMP
Administrator to continually update and monitor the inventory list and ensure that
each potential pollutant has a BMP installed to eliminate their discharge
possibility.
Material Trade
Name
Applicable
to Site
Y of N
Potential
Pollutant
Associated BMP(s)
Glue, Adhesives Y Polymers, epoxies
• Disposal of used containers must follow
manufacturer specifications.
• Proper application (see manufacturer
recommendations).
• Storage of glues and adhesives:
Properly sealed containers on a pallet,
preferably under shelter or tarp.
• Secondary containment practices.
Fertilizer Y
Nitrogen,
Phosphorous
• Follow manufacturer’s application
specifications.
• Do not apply prior to storm event.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
Cleaning Solvents Y
Perchloroethylene,
methylene
chloride,
• Proper application (see manufacturer
recommendations).
• Disposal of used containers and excess
Material Trade
Name
Applicable
to Site
Y of N
Potential
Pollutant
Associated BMP(s)
trichloroethylene,
petroleum
distillates
material must follow manufacturer
specifications.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
Hydraulic Oil/Fluids Y Mineral oil
• Proper application (see manufacturer
recommendations).
• Disposal of used containers and excess
material must follow manufacturer
specifications.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
• All onsite vehicles will be routinely
inspected for leaks and drips.
Gasoline Y
Benzene, ethyl
benzene, toluene,
xylene, MTBE
• Proper application (see manufacturer
recommendations).
• Disposal of used containers and excess
material must follow manufacturer
specifications.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
• All onsite vehicles will be routinely
inspected for leaks and drips.
Antifreeze/ Coolant Y
Ethylene glycol,
propylene glycol,
heavy metals
(copper, lead, zinc)
• Proper application (see manufacturer
recommendations).
• Disposal of used containers and excess
material must follow manufacturer
specifications.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
• All onsite vehicles will be routinely
inspected for leaks and drips.
Material Trade
Name
Applicable
to Site
Y of N
Potential
Pollutant
Associated BMP(s)
to bind the dirt to the earth during
construction
• speed limit controls to ensure minimal
dust kick up produced by moving
vehicles
• Ceasing any earth moving activity
during high wind.
• Other BMPs may be introduced on site
during construction. The plan will be
amended as needed.
Boring Activities N Bentonite
The use of Bentonite may be used on site
when temperatures and conditions
warrant its use. While using Bentonite on
site the following BMPs will be
implemented to protect its discharge into
stormwater:
• Proper application (see manufacturer
recommendations).
• Disposal of used containers and excess
material must follow manufacturer
specifications.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
• Use of a designated containment pit
and/or a vacuum truck for removal from
project site.
2.1.3 Potential Pollutants
The following table lists the major construction activities and the potential pollutants that are
associated with the activities. The table also identifies the BMPs (structural and non- structural)
used to minimize and eliminate possible discharge of the potential pollutants with stormwater
discharge. For the specific BMP technical specifications please refer to section VII of this
SWMP.
Note to SWMP Administrator: The populated list below will serve as an initial
guidance to the potential pollutants associated with major construction activities.
The list also provides BMPs (structural and non-structural) for the associated
pollutants. However, it is the responsibility of the SWMP Administrator to
continually update and monitor the inventory list and ensure that each potential
pollutant has a BMP installed to eliminate their discharge possibility.
Major Construction
Activity
Applicable
to Site
Y or N
Potential Pollutant Associated BMP(s)
Clearing and
grubbing operations
Y
Sediment; oil;
grease; hydraulic
Major Construction
Activity
Applicable
to Site
Y or N
Potential Pollutant Associated BMP(s)
dust particles); oil;
grease; hydraulic
fluid; fuel
functional prior to activity.
• Dust control practices must be
implemented.
• All disturbed soils that will not be
paved, built on or fully landscaped
within 60 days must be seeded with a
temporary or permanent vegetative
cover within 14 days after completion
of grading operations.
• All onsite vehicles will be routinely
inspected for leaks and drips.
Soil Import
Operations
Y
Sediment; oil;
grease; hydraulic
fluid; nutrients.
• All imports of soil materials must be
appropriately covered to prevent the
loss of any material.
• Stockpiling of imported soils must
adhere to stockpiling practices in this
table.
Utility Excavation
Operations
Y
Sediment; oil;
grease; hydraulic
fluid.
• Perimeter BMPs must be in place and
functional prior to activity.
• Vehicle tracking controls must be
implemented.
Landscaping
Operations
Y
Sediment; oil;
grease; hydraulic
fluid; nutrients
• Perimeter BMPs must be in place and
functional prior to activity.
• Stockpiling of all landscaping materials
must adhere to stockpiling practices
below.
Soil Stockpiling
Operations
Y
Sediment; oil;
grease; hydraulic
fluid; nutrients;
organics
Major Construction
Activity
Applicable
to Site
Y or N
Potential Pollutant Associated BMP(s)
Damage to
structural BMPs.
and unloading procedures to minimize
vehicle tracking and damage to
structural BMPs.
Dedicated Asphalt
and Concrete Batch
Plants
N
Limestone, sand,
pH; Oil, petroleum
distillates
N/A to the site
2.1.4 Non-Stormwater Discharges
In accordance with I.D.3.b. of the CDPS General Permit for Stormwater Discharges Associated
with Construction Activity:
Discharges from the following sources that are combined with stormwater discharges
associated with construction activity may be authorized by the Stormwater Construction permit,
provided that the non-stormwater component of the discharge is identified in the SWMP (see
Part I.C.1.g of the permit):
• Emergency firefighting activities
• Landscape irrigation return flow
• Uncontaminated springs
• Discharges to the ground of concrete washout water from washing of tools and concrete
mixer chutes are allowed under this SWMP, provided that: the washout water is confined
in a concrete washout area and does not leave the site as surface runoff or to surface
waters, and does not connect directly to the groundwater table.
• Certain construction dewatering discharges. The WQCD’s General Permit for
Stormwater Discharges from Construction Activities allows for dewatering of
groundwater and stormwater to the ground surface to allow for infiltration on the site. No
groundwater from construction dewatering will be discharged as surface runoff or to
surface waters on the site. It is not anticipated that dewatering activities will be required
during this project. However, if dewatering becomes necessary, groundwater and/or
stormwater may be pumped from excavations or trenches to the ground surface on the
site for infiltration or evaporation. The location of pumping and deposition of the
groundwater or stormwater will be marked on the site plan prior to the start of pumping
activities. If it becomes necessary to pump groundwater off site or into a waterway or
storm sewer, then a groundwater discharge permit must be obtained from the State prior
to engaging such activities. A copy of the groundwater discharge permit shall be inserted
into this SWMP.
The following table lists remaining non-stormwater discharge activities and the associated
BMPs (structural and non-structural) used to minimize and eliminate discharge of pollutants. For
specific BMP technical specifications please refer to Section VII of this SWMP.
Note to SWMP Administrator: The populated list below will serve as an initial guidance to
non-stormwater discharge activities. The list also provides BMPs (structural and non-
structural) for the associated activities. However, it is the responsibility of the SWMP
Administrator to continually update and monitor the inventory list and ensure that each
activity has a BMP installed to eliminate any discharge possibility.
Non-Stormwater Discharge
Activity
Associated BMPs
Vehicle Equipment
Maintenance and Fueling
• Designate a specific location for vehicle maintenance.
• Provide proper containment around the perimeter of
maintenance area.
• Designate a specific location for vehicle fueling.
• All fuel to be used and stored on site shall be placed in
secondary containment.
• Spill kits should be available at maintenance and fueling
areas.
• Areas shall be inspected thoroughly preferably at more
frequent intervals than regular stormwater inspections.
• Educate all personnel on proper fueling and maintenance
practices to avoid any discharge of pollutants.
• Educate personnel on spill response techniques.
• Identify maintenance and fueling location(s) on the SWMP
site map.
Illegal Connections/Illicit
Discharges into Storm Sewer
System
• Pre-existing areas of contamination or known discharges
will be expressed in site conditions (if these areas or
occurrences are known).
• Inspect site prior to beginning work for evidence of illegal
discharges or connections.
Sanitary and Septic Wastes
• All sanitary waste will be collected from portable units a
minimum of three times per week or as required by local,
State, or Federal regulation.
• The responsible party shall ensure that a qualified and
licensed sanitary waste management contractor collect the
sanitary waste from the portable units.
Construction Dewatering
• Construction dewatering water cannot be discharged to
surface waters or storm sewer systems without separate
permit coverage.
• The discharge of construction dewatering waters to the
ground may be allowed by the Stormwater Construction
Permit when appropriate BMPs are implemented and the
discharge does not leave the site as surface runoff or to
storm sewer systems/surface waters.
• The SWMP Administrator will be responsible for making the
necessary changes to the SWMP if dewatering must be
completed on site.
2.1.5 Materials Handling and Spill Prevention
2.1.5.1 Purpose
Prevent or reduce the discharge of pollutants to drainage systems or watercourses from leaks
and spills by reducing the chance for spills, stopping the source of spills, containing and
cleaning up spills, properly disposing of spill materials, and training employees on spill
prevention control measures, proper cleanup and notification/reporting requirements.
2.1.5.2 Practices
The following lists the proposed spill response practices for onsite personnel:
1. Manufacturer’s recommended methods for spill cleanup will be clearly posted and site
personnel will be made aware of the procedures and the location of the information and
cleanup supplies.
2. Materials and equipment necessary for spill cleanup (spill kit) will be kept in the material
storage area onsite. Equipment and materials will include, but not be limited to, brooms,
dust pans, mops, rags, gloves, goggles, kitty litter, sand, sawdust, and plastic and metal
trash containers specifically for this purpose. Spill kit shall be inspected regularly and
maintained by the contractor. Contractor shall provide spill kit and any additional items
required for spill cleanup.
3. All spills will be cleaned up immediately after discovery. Spills shall be disposed of at an
approved waste site.
4. The spill area will be kept well ventilated and personnel will wear appropriate protective
clothing to prevent injury from contact with a hazardous substance.
5. All spills of 5 gallons or more shall be reported to Larimer County and the general
contractor, as well as those spills which threaten to leave the site or affect any
stormwater conveyance.
6. Spills of toxic or hazardous material will be reported to the appropriate local, State, or
Federal agency, regardless of the size.
7. The contractor shall document all spills, discharges, leaks, upsets, events or overflows.
Documentation shall include date, time, location, material, corrective action taken,
response procedure taken, response personnel involved, notification of
authorities/agencies, and a location map.
8. The spill prevention plan will be adjusted to include measures to prevent this type of spill
from reoccurring and how to clean up the spill if there is another one. A description of the
spill, what caused it, and the cleanup measures will also be included.
9. Educational practices for spill prevention and response as well as all spill response
measures and practices are the SWMP Administrator’s duties through the life of the
project unless otherwise directed in the SWMP amendment section of this plan (Section
XII).
The responsibilities for spill prevention and response include but are not limited to the following:
• Education of all personnel who will be conducting work at any time on the job site.
• Identify and continually update Potential Pollutant Table listed in this SWMP.
• Specify where all spill kits will be located on site and post this information inside the
construction trailer.
Material Released to: State Reportable Quantity
Engine oil, diesel, fuel, hydraulic
oil
Land 25 gallons
Engine oil, diesel, fuel, hydraulic
oil
Water Visible sheen
Antifreeze Land 100 lbs. (13 gallons)
Battery Acid Land, Water 100 lbs.
Refrigerant Air 1 lb.
Gasoline Air, Land, Water 100 lbs. (13 gallons)
Solvents and degreasers Air, Land, Water 100 lbs. (13 gallons)
Minor spills are defined as those spills which are less than the reportable quantity listed above,
stay in the permitted area & do not threaten any stormwater conveyance.
Significant spills are defined as those spills which are greater than or equal to the reportable
quantity listed above, permit any amount of the contaminant to leave the permitted area, or
threaten stormwater conveyance. Cleanup shall include:
• Notify city within 24 hours and provide written documentation within 5 days of the spill.
• Notify the general contractor’s on-site foreman or superintendent immediately. The
foreman or superintendent shall ensure the spill cleanup methods and procedures are
followed.
• If the spill occurs on a paved or impermeable surface, clean up using “dry” methods
(absorbent materials, cat litter, and/or rags). Contain the spill by encircling with
absorbent materials and do not let the spill spread. If the spill occurs in dirt areas,
immediately contain the spill by constructing an earthen dike. Dig up and dispose of
contaminated soil to an approved waste site.
Hazardous spills are those spills which cannot be controlled/contained by personnel in
the immediate vicinity. Cleanup shall include:
• Notify the superintendent immediately, remove personnel from the spill site & consult
MSDS for clean-up information.
• Notify the local emergency response by dialing 911. Also notify the proper City &
County officials. All telephone notifications shall be followed with a written notification.
• For spills greater than or equal to the Federal reportable quantity, the contractor shall
notify the EPA National Response Center, CDPHE, and City & County officials. All
telephone notifications shall be followed with a written notification.
A spill contractor or Haz-Mat team shall be contacted immediately for site cleanup. Construction
personnel should not attempt to clean the spill until qualified staff have arrived at the site
and assessed the situation.
2.1.6 Waste Management and Materials Handling
Waste Management and Materials Handling will address the following components:
1. Solid Waste Management
2. Hazardous Waste Management
3. Liquid Waste Management
4. Material Storage
**Please note that vehicle fueling/washing, concrete waste management, construction
dewatering, sanitary/septic waste management are all addressed Section 2.0
Solid Waste Management
Solid waste management procedures and practices are designed to prevent or reduce the
discharge of pollutants to stormwater from solid or construction waste by providing designated
waste collection areas and containers, arranging for regular disposal, and training employees
and subcontractors.
All waste materials will be collected and stored in a securely lidded dumpster. All trash and
construction debris from the site will be deposited in the dumpster. The dumpster shall meet all
local, State, and Federal solid waste management regulations. The dumpster will be emptied a
minimum of twice per week by a qualified and licensed solid waste management contractor, and
will be hauled to an approved dumping site. No construction waste materials will be buried on
the project site. All personnel will be instructed regarding the correct procedure for waste
disposal. Notices stating these practices shall be posted on the job site. The SWMP
Administrator will ensure these practices are being followed.
Hazardous Materials Management
Prevent or reduce the discharge of pollutants to stormwater from hazardous waste through
proper material use, waste disposal, and training of employees and subcontractors.
The responsible parties shall manage Hazardous Materials on site by implementing the
following five BMPs to Hazardous Materials Management:
• Material Use
• Waste Recycling Disposal
• Disposal Procedures specified by local, State or Federal regulations
• Education
• Inspection and Maintenance
Liquid Waste Management
Liquid waste management includes procedures and practices to prevent discharge of pollutants
to the storm drain system or to watercourses as a result of the creation, collection, and disposal
of non-hazardous liquid wastes.
The responsible parties shall manage Liquid Waste on site by implementing the following
five BMPs to Liquid Waste Management:
• Education
• Containment
• Capture
• Disposal
• Inspection and Maintenance
Material Storage
Prevent, reduce, or eliminate the discharge of pollutants from material storage to the stormwater
system or watercourses by minimizing the storage of hazardous materials onsite, storing
materials in a designated area, installing secondary containment, conducting regular
inspections, and training employees and subcontractors.
The site will designate a specific location where the Material Storage Area or areas will be
located. This location will be referenced on Erosion and Sediment Control Plan.
The following BMPs will be implemented at each Material Storage location on site:
• Designate entrance and exit points.
• Install vehicle tracking control at entry and exit point(s)
• Appropriate perimeter BMPs need to be installed.
All materials must be properly and tightly sealed in original containers with manufacturer’s label
for identification. Damaged or illegible labels should be replaced immediately.
Materials must be stored at a minimum on pallets, but preferably in secondary containment to
prevent any leaks or spills to exit into the ground or come into contact with stormwater.
Materials preferably will be stored under a cover or tightly secured tarp to prevent contact with
stormwater.
The Material Storage Area must be inspected at a minimum during regularly scheduled
stormwater inspections. Inspector should pay close attention to any signs of leaks or spills.
Spill kits should be present at the Material Storage Area.
All on site workers shall be trained and educated in proper material handling and storage prior
to conducting any work with materials.
Material Safety Data Sheets (MSDS) sheets should be made available for all materials stored
on site.
If more than 1,320 gallons of petroleum products in 55 gallon drums or larger containers will be
stored onsite overnight a site specific Spill Prevention, Control and Countermeasure plan,
stamped by a certified engineer is required.
3.0 BEST MANAGEMENT PRACTICES
3.1.1 Purpose
Section 3.0 of the Stormwater Management Plan will identify the Best Management Practices
associated with the project. This section will call out phasing of the BMPs that will coincide with
the sequencing for major construction activities on the site. A section of technical drawings and
installation specifications of each BMP will also be included.
Note to SWMP Administrator: The BMPs listed in this SWMP plan shall serve as
guidance. It is the responsibility of the SWMP Administrator to ensure all BMPs called
out in this plan are adequate for the current conditions on site. It is the responsibility of
the SWMP Administrator to make necessary changes to the SWMP concerning BMPs,
when BMPs are replaced or new BMPs are needed on site due to changing site
conditions in order to keep the site in compliance with the stormwater permit.
3.1.2 Description and Maintenance
Structural and non-structural BMPs shall be implemented on site to help prevent erosion and
sedimentation. Below is a description of each on site BMPs purpose, limitations, installation,
inspection, and maintenance requirements.
Temporary and permanent erosion sediment controls shall be used to provide soil stabilization
and divert stormwater runoff for both pre- and post-construction conditions. Structural controls,
such as fugitive dust mitigation, will be used to limit off-site tracking of sediment during
construction.
All BMPs used on site must be maintained in effective operating condition and in accordance
with good engineering, hydrologic, and pollution control practices. During routine inspections,
the site BMPs must be inspected for their effective operating condition. If a BMP or several
BMPs are found not to be operating effectively maintenance to those BMPs must be initiated
immediately.
Replacement of failed BMPs must occur immediately upon findings of noncompliance and failed
performance of any particular BMP on the project site. New BMPs that are installed or replaced
will result in a need to properly update the SWMP and the site map to show the changes.
See attached BMP details provided on the Erosion and Sediment Control Plan courtesy of the
Urban Storm Drainage, Criteria Manual Volume 3.
3.1.3 Phasing and Sequencing
See attached Erosion and Sediment Control Plan.
4.0 FINAL STABILIZATION
4.1.1 Purpose
Section 4.0 details how the site will achieve final stabilization/re-vegetation for the project. It is
required by the permit for Stormwater Discharges associated with Construction Activities that
final stabilization will be achieved when all ground disturbing activities are completed and a
uniform vegetative cover has been established with an individual plant density of at least 70%
pre-disturbance level, or equivalent permanent, physical erosion reduction methods have been
employed.
Note to SWMP Administrator: The removal of temporary BMPs must not take place until
the site has completed ground disturbing activities and a uniform vegetative cover has
been established in the designated re-vegetation areas with the individual plant density
of 70% pre-disturbance levels.
4.1.2 Site Specific Re-Vegetation Plan
The re-vegetation plan for the project consists of surface roughening upon completion of all
construction activities. Following surface roughening, all disturbed areas not covered by gravel
paving or the building pad shall be seeded & mulched per the enclosed erosion control plan.
The project will utilize sod, ornamental grasses, native plantings, rock mulch, trees, and shrubs
as a final stabilization method of all disturbed areas.
Note to SWMP Administrator: It is the responsibility of the SWMP Administrator to
oversee seeding operations to ensure proper application for expected growth.
4.1.3 Post-Construction BMPs
Post Construction BMPs or permanent structures that will remain on site include permanent
landscaping and a stormwater detention facility. An Operating and Maintenance manual may be
developed in accordance to the CDPHE requirements and can thus be referenced for future
maintenance procedures. Phasing of the stabilization plan, changes in inspection frequency,
and closing of the CDPS permit shall be documented. Final stabilization is anticipated to be
complete in 2017.
United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Larimer County
Natural Area, Colorado
Resources
Conservation
Service
December 21, 2015
Preface
Soil surveys contain information that affects land use planning in survey areas. They
highlight soil limitations that affect various land uses and provide information about
the properties of the soils in the survey areas. Soil surveys are designed for many
different users, including farmers, ranchers, foresters, agronomists, urban planners,
community officials, engineers, developers, builders, and home buyers. Also,
conservationists, teachers, students, and specialists in recreation, waste disposal,
and pollution control can use the surveys to help them understand, protect, or enhance
the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil properties
that are used in making various land use or land treatment decisions. The information
is intended to help the land users identify and reduce the effects of soil limitations on
various land uses. The landowner or user is responsible for identifying and complying
with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some cases.
Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/portal/
nrcs/main/soils/health/) and certain conservation and engineering applications. For
more detailed information, contact your local USDA Service Center (http://
offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic
tank absorption fields. A high water table makes a soil poorly suited to basements or
underground installations.
The National Cooperative Soil Survey is a joint effort of the United States Department
of Agriculture and other Federal agencies, State agencies including the Agricultural
Experiment Stations, and local agencies. The Natural Resources Conservation
Service (NRCS) has leadership for the Federal part of the National Cooperative Soil
Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs
and activities on the basis of race, color, national origin, age, disability, and where
applicable, sex, marital status, familial status, parental status, religion, sexual
orientation, genetic information, political beliefs, reprisal, or because all or a part of an
individual's income is derived from any public assistance program. (Not all prohibited
bases apply to all programs.) Persons with disabilities who require alternative means
2
for communication of program information (Braille, large print, audiotape, etc.) should
contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a
complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400
Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272
(voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and
employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
Soil Map..................................................................................................................7
Soil Map................................................................................................................8
Legend..................................................................................................................9
Map Unit Legend................................................................................................10
Map Unit Descriptions........................................................................................10
Larimer County Area, Colorado......................................................................12
3—Altvan-Satanta loams, 0 to 3 percent slopes.........................................12
22—Caruso clay loam, 0 to 1 percent slope...............................................14
36—Fort Collins loam, 3 to 5 percent slopes..............................................15
37—Fort Collins loam, 5 to 9 percent slopes..............................................16
73—Nunn clay loam, 0 to 1 percent slopes.................................................17
74—Nunn clay loam, 1 to 3 percent slopes.................................................19
References............................................................................................................21
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous areas
in a specific area. They include a description of the soils and miscellaneous areas and
their location on the landscape and tables that show soil properties and limitations
affecting various uses. Soil scientists observed the steepness, length, and shape of
the slopes; the general pattern of drainage; the kinds of crops and native plants; and
the kinds of bedrock. They observed and described many soil profiles. A soil profile is
the sequence of natural layers, or horizons, in a soil. The profile extends from the
surface down into the unconsolidated material in which the soil formed or from the
surface down to bedrock. The unconsolidated material is devoid of roots and other
living organisms and has not been changed by other biological activity.
Currently, soils are mapped according to the boundaries of major land resource areas
(MLRAs). MLRAs are geographically associated land resource units that share
common characteristics related to physiography, geology, climate, water resources,
soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically
consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that is
related to the geology, landforms, relief, climate, and natural vegetation of the area.
Each kind of soil and miscellaneous area is associated with a particular kind of
landform or with a segment of the landform. By observing the soils and miscellaneous
areas in the survey area and relating their position to specific segments of the
landform, a soil scientist develops a concept, or model, of how they were formed. Thus,
during mapping, this model enables the soil scientist to predict with a considerable
degree of accuracy the kind of soil or miscellaneous area at a specific location on the
landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented by
an understanding of the soil-vegetation-landscape relationship, are sufficient to verify
predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them to
identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character of
soil properties and the arrangement of horizons within the profile. After the soil
scientists classified and named the soils in the survey area, they compared the
5
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that have
similar use and management requirements. Each map unit is defined by a unique
combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components of
the map unit. The presence of minor components in a map unit in no way diminishes
the usefulness or accuracy of the data. The delineation of such landforms and
landform segments on the map provides sufficient information for the development of
resource plans. If intensive use of small areas is planned, onsite investigation is
needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape, and
experience of the soil scientist. Observations are made to test and refine the soil-
landscape model and predictions and to verify the classification of the soils at specific
locations. Once the soil-landscape model is refined, a significantly smaller number of
measurements of individual soil properties are made and recorded. These
measurements may include field measurements, such as those for color, depth to
bedrock, and texture, and laboratory measurements, such as those for content of
sand, silt, clay, salt, and other components. Properties of each soil typically vary from
one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists interpret
the data from these analyses and tests as well as the field-observed characteristics
and the soil properties to determine the expected behavior of the soils under different
uses. Interpretations for all of the soils are field tested through observation of the soils
in different uses and under different levels of management. Some interpretations are
modified to fit local conditions, and some new interpretations are developed to meet
local needs. Data are assembled from other sources, such as research information,
production records, and field experience of specialists. For example, data on crop
yields under defined levels of management are assembled from farm records and from
field or plot experiments on the same kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on such
variables as climate and biological activity. Soil conditions are predictable over long
periods of time, but they are not predictable from year to year. For example, soil
scientists can predict with a fairly high degree of accuracy that a given soil will have
a high water table within certain depths in most years, but they cannot predict that a
high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
identified each as a specific map unit. Aerial photographs show trees, buildings, fields,
roads, and rivers, all of which help in locating boundaries accurately.
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6
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of soil
map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
7
8
Custom Soil Resource Report
Soil Map
4487670 4487750 4487830 4487910 4487990 4488070 4488150 4488230 4488310
4487670 4487750 4487830 4487910 4487990 4488070 4488150 4488230 4488310
493760 493840 493920 494000 494080 494160 494240
493760 493840 493920 494000 494080 494160 494240
40° 32' 45'' N
105° 4' 26'' W
40° 32' 45'' N
105° 4' 3'' W
40° 32' 22'' N
105° 4' 26'' W
40° 32' 22'' N
105° 4' 3'' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 150 300 600 900
Feet
0 50 100 200 300
Meters
Map Scale: 1:3,470 if printed on A portrait (8.5" x 11") sheet.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at 1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil line
placement. The maps do not show the small areas of contrasting
soils that could have been shown at a more detailed scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more accurate
calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as of
Map Unit Legend
Larimer County Area, Colorado (CO644)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
3 Altvan-Satanta loams, 0 to 3
percent slopes
0.0 0.2%
22 Caruso clay loam, 0 to 1 percent
slope
4.5 30.2%
36 Fort Collins loam, 3 to 5 percent
slopes
1.8 11.7%
37 Fort Collins loam, 5 to 9 percent
slopes
0.0 0.0%
73 Nunn clay loam, 0 to 1 percent
slopes
5.8 38.7%
74 Nunn clay loam, 1 to 3 percent
slopes
2.9 19.3%
Totals for Area of Interest 15.0 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the soils
or miscellaneous areas in the survey area. The map unit descriptions, along with the
maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the landscape,
however, the soils are natural phenomena, and they have the characteristic variability
of all natural phenomena. Thus, the range of some observed properties may extend
beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic
class rarely, if ever, can be mapped without including areas of other taxonomic
classes. Consequently, every map unit is made up of the soils or miscellaneous areas
for which it is named and some minor components that belong to taxonomic classes
other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They generally
are in small areas and could not be mapped separately because of the scale used.
Some small areas of strongly contrasting soils or miscellaneous areas are identified
by a special symbol on the maps. If included in the database for a given area, the
contrasting minor components are identified in the map unit descriptions along with
some characteristics of each. A few areas of minor components may not have been
observed, and consequently they are not mentioned in the descriptions, especially
Custom Soil Resource Report
10
where the pattern was so complex that it was impractical to make enough observations
to identify all the soils and miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the usefulness
or accuracy of the data. The objective of mapping is not to delineate pure taxonomic
classes but rather to separate the landscape into landforms or landform segments that
have similar use and management requirements. The delineation of such segments
on the map provides sufficient information for the development of resource plans. If
intensive use of small areas is planned, however, onsite investigation is needed to
define and locate the soils and miscellaneous areas.
An identifying symbol precedes the map unit name in the map unit descriptions. Each
description includes general facts about the unit and gives important soil properties
and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major horizons
that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity,
degree of erosion, and other characteristics that affect their use. On the basis of such
differences, a soil series is divided into soil phases. Most of the areas shown on the
detailed soil maps are phases of soil series. The name of a soil phase commonly
indicates a feature that affects use or management. For example, Alpha silt loam, 0
to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps. The
pattern and proportion of the soils or miscellaneous areas are somewhat similar in all
areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present or
anticipated uses of the map units in the survey area, it was not considered practical
or necessary to map the soils or miscellaneous areas separately. The pattern and
relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-
Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas that
could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion of
the soils or miscellaneous areas in a mapped area are not uniform. An area can be
made up of only one of the major soils or miscellaneous areas, or it can be made up
of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil material
and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
11
Larimer County Area, Colorado
3—Altvan-Satanta loams, 0 to 3 percent slopes
Map Unit Setting
National map unit symbol: jpw2
Elevation: 5,200 to 6,200 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Altvan and similar soils: 45 percent
Satanta and similar soils: 30 percent
Minor components: 25 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Altvan
Setting
Landform: Benches, terraces
Landform position (three-dimensional): Side slope, tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Mixed alluvium
Typical profile
H1 - 0 to 10 inches: loam
H2 - 10 to 18 inches: clay loam, loam, sandy clay loam
H2 - 10 to 18 inches: loam, fine sandy loam, silt loam
H2 - 10 to 18 inches: gravelly sand, gravelly coarse sand, coarse sand
H3 - 18 to 30 inches:
H3 - 18 to 30 inches:
H3 - 18 to 30 inches:
H4 - 30 to 60 inches:
H4 - 30 to 60 inches:
H4 - 30 to 60 inches:
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 10 percent
Available water storage in profile: Very high (about 13.2 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3e
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Hydrologic Soil Group: B
Description of Satanta
Setting
Landform: Structural benches, terraces
Landform position (three-dimensional): Side slope, tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Mixed alluvium and/or eolian deposits
Typical profile
H1 - 0 to 9 inches: loam
H2 - 9 to 18 inches: loam, clay loam, sandy clay loam
H2 - 9 to 18 inches: loam, clay loam, fine sandy loam
H2 - 9 to 18 inches:
H3 - 18 to 60 inches:
H3 - 18 to 60 inches:
H3 - 18 to 60 inches:
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 10 percent
Available water storage in profile: Very high (about 27.4 inches)
Interpretive groups
Land capability classification (irrigated): 1
Land capability classification (nonirrigated): 3c
Hydrologic Soil Group: B
Minor Components
Nunn
Percent of map unit: 10 percent
Larim
Percent of map unit: 10 percent
Stoneham
Percent of map unit: 5 percent
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22—Caruso clay loam, 0 to 1 percent slope
Map Unit Setting
National map unit symbol: jpvt
Elevation: 4,800 to 5,500 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Caruso and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Caruso
Setting
Landform: Flood-plain steps, stream terraces
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Mixed alluvium
Typical profile
H1 - 0 to 35 inches: clay loam
H2 - 35 to 44 inches: fine sandy loam, sandy loam
H2 - 35 to 44 inches: sand, gravelly sand
H3 - 44 to 60 inches:
H3 - 44 to 60 inches:
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Somewhat poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: About 24 to 48 inches
Frequency of flooding: Occasional
Frequency of ponding: None
Calcium carbonate, maximum in profile: 5 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water storage in profile: High (about 9.8 inches)
Interpretive groups
Land capability classification (irrigated): 3w
Land capability classification (nonirrigated): 5w
Hydrologic Soil Group: D
Custom Soil Resource Report
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Minor Components
Loveland
Percent of map unit: 9 percent
Landform: Terraces
Fluvaquents
Percent of map unit: 6 percent
Landform: Terraces
36—Fort Collins loam, 3 to 5 percent slopes
Map Unit Setting
National map unit symbol: jpw9
Elevation: 4,800 to 5,500 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Fort collins and similar soils: 90 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Fort Collins
Setting
Landform: Terraces, fans
Landform position (three-dimensional): Base slope, riser
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Alluvium
Typical profile
H1 - 0 to 9 inches: loam
H2 - 9 to 20 inches: loam, clay loam
H2 - 9 to 20 inches: loam, silt loam, fine sandy loam
H3 - 20 to 60 inches:
H3 - 20 to 60 inches:
H3 - 20 to 60 inches:
Properties and qualities
Slope: 3 to 5 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table: More than 80 inches
Custom Soil Resource Report
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Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water storage in profile: Very high (about 25.5 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Ecological site: Loamy Plains (R067XY002CO)
Minor Components
Ascalon
Percent of map unit: 5 percent
Kim
Percent of map unit: 3 percent
Stoneham
Percent of map unit: 2 percent
37—Fort Collins loam, 5 to 9 percent slopes
Map Unit Setting
National map unit symbol: jpwb
Elevation: 4,800 to 5,500 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Fort collins and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Fort Collins
Setting
Landform: Terraces, fans
Landform position (three-dimensional): Base slope, riser
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Alluvium
Typical profile
H1 - 0 to 6 inches: loam
H2 - 6 to 18 inches: loam, clay loam
H2 - 6 to 18 inches: loam, silt loam, fine sandy loam
H3 - 18 to 60 inches:
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H3 - 18 to 60 inches:
H3 - 18 to 60 inches:
Properties and qualities
Slope: 5 to 9 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.60 to 2.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water storage in profile: Very high (about 26.4 inches)
Interpretive groups
Land capability classification (irrigated): 4e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: Loamy Plains (R067XY002CO)
Minor Components
Larimer
Percent of map unit: 8 percent
Kim
Percent of map unit: 4 percent
Stoneham
Percent of map unit: 3 percent
73—Nunn clay loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 2tlng
Elevation: 4,100 to 5,700 feet
Mean annual precipitation: 14 to 15 inches
Mean annual air temperature: 48 to 52 degrees F
Frost-free period: 135 to 152 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Nunn and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
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Description of Nunn
Setting
Landform: Terraces
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Pleistocene aged alluvium derived from igneous, metamorphic and
sedimentary rock and/or eolian deposits
Typical profile
Ap - 0 to 6 inches: clay loam
Bt1 - 6 to 10 inches: clay loam
Bt2 - 10 to 26 inches: clay loam
Btk - 26 to 31 inches: clay loam
Bk1 - 31 to 47 inches: loam
Bk2 - 47 to 80 inches: loam
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 7 percent
Salinity, maximum in profile: Nonsaline (0.1 to 1.0 mmhos/cm)
Sodium adsorption ratio, maximum in profile: 0.5
Available water storage in profile: High (about 9.1 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: C
Ecological site: Clayey Plains (R067BY042CO)
Minor Components
Heldt
Percent of map unit: 10 percent
Landform: Terraces
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Ecological site: Clayey Plains (R067BY042CO)
Wages
Percent of map unit: 5 percent
Landform: Terraces
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Ecological site: Loamy Plains (R067BY002CO)
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74—Nunn clay loam, 1 to 3 percent slopes
Map Unit Setting
National map unit symbol: jpxn
Elevation: 4,800 to 5,600 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 135 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Nunn and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Nunn
Setting
Landform: Terraces, fans
Landform position (three-dimensional): Base slope, tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Alluvium
Typical profile
H1 - 0 to 10 inches: clay loam
H2 - 10 to 60 inches: clay loam, clay
H2 - 10 to 60 inches:
Properties and qualities
Slope: 1 to 3 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water storage in profile: Very high (about 18.9 inches)
Interpretive groups
Land capability classification (irrigated): 2e
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: C
Custom Soil Resource Report
19
Minor Components
Ulm
Percent of map unit: 10 percent
Satanta
Percent of map unit: 5 percent
Custom Soil Resource Report
20
References
American Association of State Highway and Transportation Officials (AASHTO). 2004.
Standard specifications for transportation materials and methods of sampling and
testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service
FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils
in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S.
Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making
and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service,
U.S. Department of Agriculture Handbook 436. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/national/soils/?cid=nrcs142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://www.nrcs.usda.gov/wps/
portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
21
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States, the
Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296.
http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?
cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf
Custom Soil Resource Report
22
LOT 8 +
VAC TULANE PORTION LOT 1 +
VAC TULANE
PORTION
LOT 1 +
LOT 2
CP/SSA
VTC/CWA
VTC/CWA
VTC/CWA
VTC/CWA
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
TP
TP
TP TP
TP
TP TP
TP
TP
TP
TP
TP
TP
TP
TP
TP TP
TP
TP
TP
TP
TP
TP
IP
IP
IP IP
IP
IP
IP
IP
IP
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
REVISIONS
NO.
REV.
DATE REVISIONS DESCRIPTION
project no.:
approved by:
checked by:
drawn by:
drawing no.:
QA/QC by:
date:
SHEET
TEL 970.461.7733 www.olssonassociates.com
5285 McWhinney Boulevard, Suite 160
Loveland, CO 80538
OLSSON ASSOCIATES ASSUMES
NO RESPONSIBILITY FOR
EXISTING UTILITY LOCATIONS
(HORIZONTAL OR VERTICAL). THE
EXISTING UTILITIES SHOWN ON
THIS DRAWING HAVE BEEN
PLOTTED FROM THE BEST
AVAILABLE INFORMATION. IT IS
HOWEVER THE RESPONSIBILITY
OF THE CONTRACTOR TO FIELD
VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO THE
COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES.
NOTE
THIS DOCUMENT HAS BEEN
RELEASED BY OLSSON
ASSOCIATES ONLY FOR REVIEW
BY REGULATORY AGENCIES AND
OTHER PROFESSIONALS, AND IS
SUBJECT TO CHANGE. THIS
DOCUMENT IS NOT TO BE USED
FOR CONSTRUCTION.
CALL 811 SEVENTY-TWO HOURS
PRIOR TO DIGGING, GRADING OR
EXCAVATING FOR THE MARKING OF
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
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CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
REVISIONS
NO.
REV.
DATE REVISIONS DESCRIPTION
project no.:
approved by:
checked by:
drawn by:
drawing no.:
QA/QC by:
date:
SHEET
TEL 970.461.7733 www.olssonassociates.com
5285 McWhinney Boulevard, Suite 160
Loveland, CO 80538
OLSSON ASSOCIATES ASSUMES
NO RESPONSIBILITY FOR
EXISTING UTILITY LOCATIONS
(HORIZONTAL OR VERTICAL). THE
EXISTING UTILITIES SHOWN ON
THIS DRAWING HAVE BEEN
PLOTTED FROM THE BEST
AVAILABLE INFORMATION. IT IS
HOWEVER THE RESPONSIBILITY
OF THE CONTRACTOR TO FIELD
VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO THE
COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES.
NOTE
THIS DOCUMENT HAS BEEN
RELEASED BY OLSSON
ASSOCIATES ONLY FOR REVIEW
BY REGULATORY AGENCIES AND
OTHER PROFESSIONALS, AND IS
SUBJECT TO CHANGE. THIS
DOCUMENT IS NOT TO BE USED
FOR CONSTRUCTION.
CALL 811 SEVENTY-TWO HOURS
PRIOR TO DIGGING, GRADING OR
EXCAVATING FOR THE MARKING OF
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
REVISIONS
NO.
REV.
DATE REVISIONS DESCRIPTION
project no.:
approved by:
checked by:
drawn by:
drawing no.:
QA/QC by:
date:
SHEET
TEL 970.461.7733 www.olssonassociates.com
5285 McWhinney Boulevard, Suite 160
Loveland, CO 80538
OLSSON ASSOCIATES ASSUMES
NO RESPONSIBILITY FOR
EXISTING UTILITY LOCATIONS
(HORIZONTAL OR VERTICAL). THE
EXISTING UTILITIES SHOWN ON
THIS DRAWING HAVE BEEN
PLOTTED FROM THE BEST
AVAILABLE INFORMATION. IT IS
HOWEVER THE RESPONSIBILITY
OF THE CONTRACTOR TO FIELD
VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO THE
COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES.
NOTE
THIS DOCUMENT HAS BEEN
RELEASED BY OLSSON
ASSOCIATES ONLY FOR REVIEW
BY REGULATORY AGENCIES AND
OTHER PROFESSIONALS, AND IS
SUBJECT TO CHANGE. THIS
DOCUMENT IS NOT TO BE USED
FOR CONSTRUCTION.
CALL 811 SEVENTY-TWO HOURS
PRIOR TO DIGGING, GRADING OR
EXCAVATING FOR THE MARKING OF
REVISIONS
NO.
REV.
DATE REVISIONS DESCRIPTION
project no.:
approved by:
checked by:
drawn by:
drawing no.:
QA/QC by:
date:
SHEET
TEL 970.461.7733 www.olssonassociates.com
5285 McWhinney Boulevard, Suite 160
Loveland, CO 80538
OLSSON ASSOCIATES ASSUMES
NO RESPONSIBILITY FOR
EXISTING UTILITY LOCATIONS
(HORIZONTAL OR VERTICAL). THE
EXISTING UTILITIES SHOWN ON
THIS DRAWING HAVE BEEN
PLOTTED FROM THE BEST
AVAILABLE INFORMATION. IT IS
HOWEVER THE RESPONSIBILITY
OF THE CONTRACTOR TO FIELD
VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO THE
COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES.
NOTE
THIS DOCUMENT HAS BEEN
RELEASED BY OLSSON
ASSOCIATES ONLY FOR REVIEW
BY REGULATORY AGENCIES AND
OTHER PROFESSIONALS, AND IS
SUBJECT TO CHANGE. THIS
DOCUMENT IS NOT TO BE USED
FOR CONSTRUCTION.
CALL 811 SEVENTY-TWO HOURS
PRIOR TO DIGGING, GRADING OR
EXCAVATING FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES
R
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
DRAINAGE PLAN
FORT COLLINS, CO 2016
01/27/2016
015-0720
FOOTHILLS MALL MULTI-FAMILY
DH
150720_DRN01.dwg
JG
MH
C7.0
A
12/21/2015
01/27/2016
1ST FDP SUBMITTAL
2ND FDP SUBMITTAL
B
CONSTRUCTION DOCUMENTS
JD
DRAINAGE NOTES
1. Reference Addendum 2
Drainage Analysis for the
Major Amendment to a Portion of Foothills Mall Redevelopment Planning Area 3
(Lots 3, 4, 5, and 6 of Foothills Mall Redevelopment)
R
TEL 970.431.7733
Loveland, CO 80538
Suite 160
Foothills Mall 5285 McWhinney Boulevard
Multi-Family
Exhibit B
Original Drainage Basin Map
Map taken from Foothills Redevelopment Planning PA2
Final Plans, dated 04/25/2014, prepared by R.A. Smith National
Sand Filter 2
Basin 11.47 acres
Rain Garden 29
Basin 6.22 acres
Sand Filter 4
Basin 4.38 acres
Rain Garden 31
Basin 1.36 acres
Rain Garden 33
Basin 1.76 acres
Sand Filter 1
Basin 22.72 acres
TEL 970.431.7733
Loveland, CO 80538
Suite 160
5285 McWhinney Boulevard
Foothills Mall Multi-Family R
Exhibit A
Vicinity Map
Map taken from Storm Water Management Plan for Foothills Redevelopment,
prepared by R.A. Smith National, dated Revised December 5, 2013
Lot 3, 4, 5 and 6
TEL 970.431.7733
Loveland, CO 80538
Suite 160
5285 McWhinney Boulevard
Foothills Mall Multi-Family Exhibit C R
Lot Map
LOT 3
LOT 4
LOT 5
SAND
FILTER 2.0
SAND
FILTER 4.0
RAIN
GARDEN 29.0
RAIN
GARDEN 31.0
RAIN
GARDEN 33.0
LOT 6
SAND
FILTER 1.0
TEL 970.431.7733
Loveland, CO 80538
Suite 160
5285 McWhinney Boulevard
Foothills Mall Multi-Famliy Exhibit D R
Percent Imperviousness
Lot Area (SF) AREA (AC) Landscape Paved Roof Walks
Porous
Paving
Percent
Impervious
0% 100% 90% 90% 90%
3 170,929 3.92 47,519 47,007 58,191 18,212 0 68%
4 112,588 2.58 36,461 1,162 66,796 8,169 0 61%
5 101,716 2.34 15,199 1,782 68,600 16,135 0 77%
6 134,248 3.08 33,514 2,263 89,864 8,607 0 68%
Total 519,481 8.84 132,693 52,214 283,451 51,123 0 68%
Lot Area (SF) AREA (AC) Landscape Paved Roof Walks
Porous
Paving
Percent
Impervious
0% 100% 90% 90% 90%
3 170,929 3.92 60,271 44,931 42,897 3,831 18,999 61%
4 112,588 2.58 44,439 25,197 29,278 5,663 8,011 57%
5 101,716 2.34 26,054 29,121 32,548 4,580 9,413 70%
6 134,248 3.08 30,846 47,255 38,542 5,166 12,439 73%
Total 519,481 8.84 161,610 146,504 143,265 19,240 48,862 65%
Existing Design
Proposed Design
Imperviousness
Imperviousness
R
TEL 970.431.7733
Loveland, CO 80538
Suite 160
5285 McWhinney Boulevard
Exhibit G
Sub-Basin Discharge
and Inlet Sizing
Foothills Mall Multi-Famliy
INLET SIZING
BASIN
AREA (AC)
COEFF. (C)
Tc
C*A
I 2-year (in./ hr.)
I 100-year (in./ hr.)
Q 2-year (cfs)
Q 100-year (cfs)
INLET
INLET SIZE (in)
HEAD (ft)
CAPACITY
300 0.14 0.28 5.00 0.04 2.85 9.95 0.11 0.50 3-1.0 24 0.25 2.73
301 0.47 0.75 5.00 0.35 2.85 9.95 1.01 4.40 3-2.1 24 0.35 3.63
302 0.14 0.75 5.00 0.10 2.85 9.95 0.29 1.26 3-2.0 24 0.47 4.12
303 0.16 0.70 5.00 0.11 2.85 9.95 0.32 1.40 3-14.0 24 0.12 0.91
304 0.15 0.90 5.00 0.14 2.85 9.95 0.39 1.72 3-3.1 24 0.29 3.29
305 0.47 0.75 5.00 0.35 2.85 9.95 1.00 4.36 3-4.1 34 0.35 5.35
306 0.13 0.75 5.00 0.10 2.85 9.95 0.29 1.25 3-4.0 30 0.73 8.71
307 0.18 0.71 5.00 0.13 2.85 9.95 0.36 1.56 3-8.0 24 0.36 3.68
308 0.16 0.72 5.00 0.11 2.85 9.95 0.32 1.39 3-7.0 24 0.31 3.47
309 0.05 0.78 5.00 0.04 2.85 9.95 0.10 0.45 3-9.0 24 0.12 0.91
310 0.10 0.72 5.00 0.07 2.85 9.95 0.20 0.89 3-10.0 24 0.44 4.00
311 0.47 0.76 5.00 0.36 2.85 9.95 1.02 4.45 3-10.1 24 0.35 3.63
312 0.13 0.90 5.00 0.12 2.85 9.95 0.34 1.48 3-11.1 24 0.20 2.03
313 0.27 0.73 5.00 0.19 2.85 9.95 0.56 2.42 3-12.1 24 0.10 0.63
314 0.47 0.75 5.00 0.35 2.85 9.95 1.00 4.37 3-12.2 24 0.35 3.63
400 0.14 0.85 5.00 0.12 2.85 9.95 0.35 1.51 4-3.0 30 0.42 6.80
401 0.49 0.75 5.00 0.37 2.85 9.95 1.06 4.62 4-4.1 30 0.50 7.29
402 0.53 0.73 5.00 0.39 2.85 9.95 1.10 4.80 4-5.0 30 0.31 4.58
403 0.18 0.90 5.00 0.16 2.85 9.95 0.46 1.99 4-6.1 24 0.20 2.03
404 0.49 0.76 5.00 0.37 2.85 9.95 1.07 4.65 4-8.0 24 0.50 4.25
500 0.43 0.88 5.00 0.38 2.85 9.95 1.07 4.68 5-5.0 30 0.30 4.38
501 0.31 0.95 5.00 0.30 2.85 9.95 0.84 3.67 5-7.0 24 0.25 2.73
502 0.08 0.29 5.00 0.02 2.85 9.95 0.07 0.30 5-4.0 24 0.50 4.25
503 0.19 0.88 5.00 0.17 2.85 9.95 0.48 2.10 5-3.0 24 0.52 4.33
504 0.30 0.89 5.00 0.26 2.85 9.95 0.75 3.27 5-1.0 30 0.56 7.66
505 0.25 0.80 5.00 0.20 2.85 9.95 0.56 2.46 5-1.1 24 0.58 4.57
506 0.35 0.91 5.00 0.32 2.85 9.95 0.92 4.01 5-2.2 24 0.78 5.39
600 0.27 0.95 5.00 0.26 2.85 9.95 0.73 3.19 6-1.1 30 0.50 7.29
601 0.18 0.81 5.00 0.14 2.85 9.95 0.41 1.79 6-3.0 30 0.70 8.53
602 0.20 0.93 5.00 0.19 2.85 9.95 0.54 2.36 6-5.0 30 1.00 10.38
603 0.20 0.90 5.00 0.18 2.85 9.95 0.52 2.25 6-5.1 24 0.90 5.88
604 0.30 0.92 5.00 0.28 2.85 9.95 0.79 3.46 6-7.2 24 1.16 6.95
605 0.18 0.81 5.00 0.15 2.85 9.95 0.43 1.86 6-7.1 24 0.50 4.25
606 0.16 0.93 5.00 0.15 2.85 9.95 0.42 1.85 6-7.0 30 0.60 7.91
607 0.20 0.94 5.00 0.19 2.85 9.95 0.54 2.36 6-9.0 24 0.94 6.05
608 0.20 0.81 5.00 0.16 2.85 9.95 0.47 2.05 6-9.1 24 1.12 6.78
609 0.23 0.95 5.00 0.22 2.85 9.95 0.63 2.75 6-10.1 24 0.40 3.84
610 0.29 0.95 5.00 0.28 2.85 9.95 0.79 3.46 6-10.2 24 0.39 3.80
611 0.30 0.95 5.00 0.28 2.85 9.95 0.80 3.49 6-10.3 24 0.39 3.80
BASIN CALCULATIONS
UNDERGROUND MEMBER UTILITIES
R
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
FORT COLLINS, CO 2016
01/27/2016
015-0720
FOOTHILLS MALL MULTI-FAMILY
DH
150720_ERC01.dwg
JG
BM
C4.3
A
12/21/2015
01/27/2016
1ST FDP SUBMITTAL
2ND FDP SUBMITTAL
B
JD
EROSION AND SEDIMENT CONTROL PLAN
UNDERGROUND MEMBER UTILITIES
R
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
FORT COLLINS, CO 2016
01/27/2016
015-0720
FOOTHILLS MALL MULTI-FAMILY
DH
150720_ERC01.dwg
JG
BM
C4.2
A
12/21/2015
01/27/2016
1ST FDP SUBMITTAL
2ND FDP SUBMITTAL
B
JD
EROSION AND SEDIMENT CONTROL PLAN
UNDERGROUND MEMBER UTILITIES
R
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
FORT COLLINS, CO 2016
01/27/2016
015-0720
FOOTHILLS MALL MULTI-FAMILY
DH
150720_ERC01.dwg
JG
BM
C4.1
A
12/21/2015
01/27/2016
1ST FDP SUBMITTAL
2ND FDP SUBMITTAL
B
JD
EROSION AND SEDIMENT CONTROL PLAN
1. THE EROSION CONTROL INSPECTOR MUST BE NOTIFIED AT LEAST TWENTY-FOUR (24) HOURS PRIOR TO ANY CONSTRUCTION ON THIS
SITE.
2. THERE SHALL BE NO EARTH-DISTURBING ACTIVITY OUTSIDE THE LIMITS DESIGNATED ON THE ACCEPTED PLANS.
3. ALL REQUIRED PERIMETER SILT AND CONSTRUCTION FENCING SHALL BE INSTALLED PRIOR TO ANY LAND DISTURBING ACTIVITY
(STOCKPILING, STRIPPING, GRADING, ETC). ALL OTHER REQUIRED EROSION CONTROL MEASURES SHALL BE INSTALLED AT THE
APPROPRIATE TIME IN THE CONSTRUCTION SEQUENCE AS INDICATED IN THE APPROVED PROJECT SCHEDULE, CONSTRUCTION PLANS,
AND EROSION CONTROL REPORT.
4. AT ALL TIMES DURING CONSTRUCTION, THE DEVELOPER SHALL BE RESPONSIBLE FOR PREVENTING AND CONTROLLING ON-SITE EROSION
INCLUDING KEEPING THE PROPERTY SUFFICIENTLY WATERED SO AS TO MINIMIZE WIND BLOWN SEDIMENT. THE DEVELOPER SHALL ALSO
BE RESPONSIBLE FOR INSTALLING AND MAINTAINING ALL EROSION CONTROL FACILITIES SHOWN HEREIN.
5. PRE-DISTURBANCE VEGETATION SHALL BE PROTECTED AND RETAINED WHEREVER POSSIBLE. REMOVAL OR DISTURBANCE OF EXISTING
VEGETATION SHALL BE LIMITED TO THE AREA(S) REQUIRED FOR IMMEDIATE CONSTRUCTION OPERATIONS, AND FOR THE SHORTEST
PRACTICAL PERIOD OF TIME.
6. ALL SOILS EXPOSED DURING LAND DISTURBING ACTIVITY (STRIPPING, GRADING, UTILITY INSTALLATIONS, STOCKPILING, FILLING, ETC.)
SHALL BE KEPT IN A ROUGHENED CONDITION BY RIPPING OR DISKING ALONG LAND CONTOURS UNTIL MULCH, VEGETATION, OR OTHER
PERMANENT EROSION CONTROL BMPS ARE INSTALLED. NO SOILS IN AREAS OUTSIDE PROJECT STREET RIGHTSOF-WAY SHALL REMAIN
EXPOSED BY LAND DISTURBING ACTIVITY FOR MORE THAN THIRTY (30) DAYS BEFORE REQUIRED TEMPORARY OR PERMANENT EROSION
CONTROL (E.G. SEED/MULCH, LANDSCAPING, ETC.) IS INSTALLED, UNLESS OTHERWISE APPROVED BY THE LOCAL ENTITY.
7. IN ORDER TO MINIMIZE EROSION POTENTIAL, ALL TEMPORARY (STRUCTURAL) EROSION CONTROL MEASURES SHALL:
a. BE INSPECTED AT A MINIMUM OF ONCE EVERY TWO (2) WEEKS AND AFTER EACH SIGNIFICANT STORM EVENT AND REPAIRED OR
RECONSTRUCTED AS NECESSARY IN ORDER TO ENSURE THE CONTINUED PERFORMANCE OF THEIR INTENDED FUNCTION.
b. REMAIN IN PLACE UNTIL SUCH TIME AS ALL THE SURROUNDING DISTURBED AREAS ARE SUFFICIENTLY STABILIZED AS DETERMINED BY
THE EROSION CONTROL INSPECTOR.
c. BE REMOVED AFTER THE SITE HAS BEEN SUFFICIENTLY STABILIZED AS DETERMINED BY THE EROSION CONTROL INSPECTOR.
8. WHEN TEMPORARY EROSION CONTROL MEASURES ARE REMOVED, THE DEVELOPER SHALL BE RESPONSIBLE FOR THE CLEAN UP AND
REMOVAL OF ALL SEDIMENT AND DEBRIS FROM ALL DRAINAGE INFRASTRUCTURE AND OTHER PUBLIC FACILITIES.
9. THE CONTRACTOR SHALL CLEAN UP ANY INADVERTENT DEPOSITED MATERIAL IMMEDIATELY AND MAKE SURE STREETS ARE FREE OF ALL
MATERIALS BY THE END OF EACH WORKING DAY.
10. ALL RETAINED SEDIMENTS, PARTICULARLY THOSE ON PAVED ROADWAY SURFACES, SHALL BE REMOVED AND DISPOSED OF IN A MANNER
AND LOCATION SO AS NOT TO CAUSE THEIR RELEASE INTO ANY WATERS OF THE UNITED STATES.
11. NO SOIL STOCKPILE SHALL EXCEED TEN (10) FEET IN HEIGHT. ALL SOIL STOCKPILES SHALL BE PROTECTED FROM SEDIMENT TRANSPORT
BY SURFACE ROUGHENING, WATERING, AND PERIMETER SILT FENCING. ANY SOIL STOCKPILE REMAINING AFTER THIRTY (30) DAYS SHALL
BE SEEDED AND MULCHED.
12. THE STORMWATER VOLUME CAPACITY OF DETENTION PONDS WILL BE RESTORED AND STORM SEWER LINES WILL BE CLEANED UPON
COMPLETION OF THE PROJECT AND BEFORE TURNING THE MAINTENANCE OVER TO THE LOCAL ENTITY OR HOMEOWNERS ASSOCIATION
(HOA).
13. CITY ORDINANCE AND COLORADO DISCHARGE PERMIT SYSTEM (CDPS) REQUIREMENTS MAKE IT UNLAWFUL TO DISCHARGE OR ALLOW
THE DISCHARGE OF ANY POLLUTANT OR CONTAMINATED WATER FROM CONSTRUCTION SITES. POLLUTANTS INCLUDE, BUT ARE NOT
LIMITED TO DISCARDED BUILDING MATERIALS, CONCRETE TRUCK WASHOUT, CHEMICALS, OIL AND GAS PRODUCTS, LITTER, AND SANITARY
WASTE. THE DEVELOPER SHALL AT ALL TIMES TAKE WHATEVER MEASURES ARE NECESSARY TO ASSURE THE PROPER CONTAINMENT AND
DISPOSAL OF POLLUTANTS ON THE SITE IN ACCORDANCE WITH ANY AND ALL APPLICABLE LOCAL, STATE, AND FEDERAL REGULATIONS.
14. A DESIGNATED AREA SHALL BE PROVIDED ON SITE FOR CONCRETE TRUCK CHUTE WASHOUT. THE AREA SHALL BE CONSTRUCTED SO AS
TO CONTAIN WASHOUT MATERIAL AND LOCATED AT LEAST FIFTY (50) FEET AWAY FROM ANY WATERWAY DURING CONSTRUCTION. UPON
COMPLETION OF CONSTRUCTION ACTIVITIES THE CONCRETE WASHOUT MATERIAL WILL BE REMOVED AND PROPERLY DISPOSED OF
PRIOR TO THE AREA BEING RESTORED.
15. TO ENSURE THAT SEDIMENT DOES NOT MOVE OFF OF INDIVIDUAL LOTS ONE OR MORE OF THE FOLLOWING SEDIMENT/EROSION CONTROL
BMPS SHALL BE INSTALLED AND MAINTAINED UNTIL THE LOTS ARE SUFFICIENTLY STABILIZED, AS DETERMINED BY THE EROSION CONTROL
INSPECTOR, (WITHIN LOVELAND GMA AND CITY LIMITS ONLY).
a. BELOW ALL GUTTER DOWNSPOUTS.
b. OUT TO DRAINAGE SWALES.
c. ALONG LOT PERIMETER.
d. OTHER LOCATIONS, IF NEEDED.
16. CONDITIONS IN THE FIELD MAY WARRANT EROSION CONTROL MEASURES IN ADDITION TO WHAT IS SHOWN ON THESE PLANS. THE
DEVELOPER SHALL IMPLEMENT WHATEVER MEASURES ARE DETERMINED NECESSARY, AS DIRECTED BY THE CITY/COUNTY.
17. A VEHICLE TRACKING CONTROL PAD SHALL BE INSTALLED WHEN NEEDED FOR CONSTRUCTION EQUIPMENT, INCLUDING BUT NOT LIMITED
TO PERSONAL VEHICLES EXITING EXISTING ROADWAYS. NO EARTHEN MATERIALS, I.E. STONE, DIRT, ETC. SHALL BE PLACED IN THE CURB &
GUTTER OR ROADWAY AS A RAMP TO ACCESS TEMPORARY STOCKPILES, STAGING AREAS, CONSTRUCTION MATERIALS, CONCRETE
WASHOUT AREAS, AND/OR BUILDING SITES.
STANDARD GRADING AND EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES
IP
IP IP
IP
IP
IP
IP
IP IP
IP
IP
IP IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IP
IPIP
IP
IP IP
IP
IP
IP
IP
TP
IP
IP
IP
IP
IP
IP
IP
IP
IP
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EROSION CONTROL LEGEND
EXISTING PROPOSED
PROPERTY LINE
CURB AND GUTTER
STORM SEWER
STORM MANHOLE
STORM INLET
MAJOR CONTOURS
MINOR CONTOURS
FLARED END SECTION
SCL
SF
CWA
VTC
IP
SEDIMENT CONTROL LOG
SILT FENCE
CONCRETE WASHOUT AREA
VEHICLE TRACKING CONTROL
INLET PROTECTION
TREE PROTECTION
STABILIZED STAGING AREA
CONSTRUCTION PHASING/
SEQUENCING
TP
SSA
CP
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
REVISIONS
NO.
REV.
DATE REVISIONS DESCRIPTION
project no.:
approved by:
checked by:
drawn by:
drawing no.:
QA/QC by:
date:
SHEET
TEL 970.461.7733 www.olssonassociates.com
5285 McWhinney Boulevard, Suite 160
Loveland, CO 80538
OLSSON ASSOCIATES ASSUMES
NO RESPONSIBILITY FOR
EXISTING UTILITY LOCATIONS
(HORIZONTAL OR VERTICAL). THE
EXISTING UTILITIES SHOWN ON
THIS DRAWING HAVE BEEN
PLOTTED FROM THE BEST
AVAILABLE INFORMATION. IT IS
HOWEVER THE RESPONSIBILITY
OF THE CONTRACTOR TO FIELD
VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO THE
COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES.
NOTE
THIS DOCUMENT HAS BEEN
RELEASED BY OLSSON
ASSOCIATES ONLY FOR REVIEW
BY REGULATORY AGENCIES AND
OTHER PROFESSIONALS, AND IS
SUBJECT TO CHANGE. THIS
DOCUMENT IS NOT TO BE USED
FOR CONSTRUCTION.
CALL 811 SEVENTY-TWO HOURS
PRIOR TO DIGGING, GRADING OR
EXCAVATING FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES
R
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
DATE
DATE
DATE
DATE
DATE
DATE
CITY ENGINEER
WATER AND WASTEWATER UTILITY
STORMWATER UTILITY
PARKS AND RECREATION
TRAFFIC ENGINEER
FORT COLLINS, CO 2016
01/27/2016
015-0720
FOOTHILLS MALL MULTI-FAMILY
DH
150720_ERC01.dwg
JG
BM
C4.0
A
12/21/2015
01/27/2016
1ST FDP SUBMITTAL
2ND FDP SUBMITTAL
B
JD
EROSION AND SEDIMENT CONTROL PLAN
the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 10, Sep 22, 2015
Soil map units are labeled (as space allows) for map scales 1:50,000
or larger.
Date(s) aerial images were photographed: Apr 22, 2011—Apr 28,
2011
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor shifting
of map unit boundaries may be evident.
Custom Soil Resource Report
9
• All stockpiles must be kept out of flow
lines, off impervious areas and away
from adjacent waterways.
• Stockpiles must be protected from run-
on and runoff using perimeter controls
such as silt fence, fiber rolls, and
gravel bags.
• Stockpiles shall be stabilized within 14
days of establishment by surface
roughening, seeding and mulching.
• Stockpiles must not reach a height
greater than 15 feet.
Building Operations Y
Sediment; oil;
grease; hydraulic
fluid; gross
pollutants(trash and
debris); chemicals;
pesticides; concrete
waste; organics
• Perimeter BMPs must be in place and
functional prior to activity.
• Curbside BMPs must be in place and
functional prior to activity.
Entry and Exit Points
to Site
Y
Sediment (including
dust particles)
• Designated entry and exit points must
be identified on site.
• Barriers may be used where entry/exit
is prohibited (i.e. construction fence;
concrete barrier).
• Vehicle Tracking Controls will be
installed at the site entry/exit points.
Loading and
Unloading Operations
Y
Sediment (including
dust particles).
• SWMP Administrator must educate
site workers on appropriate loading
fluid; fuel
• Perimeter BMPs must be in place and
functional prior to activity.
Grading Operations Y Sediment (including • Perimeter BMPs must be in place and
Pesticides(herbicides,
insecticides,
fungicides,
rodenticides)
Y
Chlorinated
hydrocarbons,
organophosphates,
carbonates,
arsenic
• Follow manufacturer’s application
specifications.
• Do not apply prior to storm event.
• Storage: Tightly sealed containers,
placed on a pallet, preferably under
shelter or tarp.
• Secondary containment practices.
Dust or particulate
generating processes
Y Dust, particulates
BMPs used on site to reduce the
movement of dust and particulates
include but are not limited to the
following:
• watering practices during earth moving
activities
• the application of a chemical substance