Construction Stormwater Management Plan (SWMP)
Transcript of Construction Stormwater Management Plan (SWMP)
Construction Stormwater Management Plan
(SWMP) for
Gateway Crossing
City and County of Denver
Prepared for:
Equity Ventures Commercial, Inc.
3501 SW Fairlawn Rd. Ste 200
Topeka, KS 66614
Prepared by: Amanda Carlston, EIT
Date: December 12, 2018
5255 Ronald Reagan Blvd, Suite 210 Johnstown, CO 80534 (303) 322-6480 EMAIL: [email protected]/[email protected]
Section Page
1. Sediment and Erosion Control Report ................................................................................ 3
Appendix A – Narrative Report Information Worksheet
Appendix B – NRCS Soils Map
Appendix C – Erosion and Sediment Control Plan Set
Appendix D – Site Photos
Table of Contents
SEDIMENT & EROSION CONTROL REPORT
FOR
GATEWAY CROSSING
LOCATED AT
SECTION 16, TOWNSHIP 3 SOUTH, RANGE 66 WEST, 6TH P.M.
During the construction process, soil is the most vulnerable to erosion by wind and water. This
eroded soil endangers water resources by reducing water quality and causing the siltation of
aquatic habitat for fish and other desirable species. Eroded soil also necessitates repair of sewers
and ditches, and the dredging of lakes. In addition, clearing and grading during construction
causes the loss of native vegetation necessary for terrestrial and aquatic habitat, and may be
necessary to provide a healthy living environment for citizens of Denver.
INTENT OF THE STORMWATER MANAGEMENT PLAN (SWMP)
The intent of the Sediment and Erosion Control Report is to minimize water Pollution by providing
guidance on how to protect the storm drain inlet and adjacent detention basin during
construction activities from grading, utility construction, waste materials such as concrete
washout, and any disturbances to dirt/earth. Protect as much existing vegetation as possible,
slow down runoff, prevent or minimize erosion form construction activities, provide incremental
phased seeding and mulching, avoidance and minimization, stabilization, implementation,
seeding and scheduling of the plan. Stabilize earth disturbances; prevent sediment from reaching
the receiving or surface waters.
CONTACT INFORMATION AND RESPONSIBLE PARTIES
Prepared by:
Ridgetop Engineering & Consulting, LLC
5255 Ronald Reagan Blvd Suite 210
Johnstown, CO 80534
970.663.4552
Contractor and SWMP Administrator:
Company Name:____TBD__________________________________________
Address:________________________________________________________________
Telephone:_________________
Project Manager:_______________________
Emergency SWMP Contact:__________________________
PROJECT SITE DESCRIPTION
The site is located at 18251 Green Valley Ranch Blvd and 4891 Tower Road; which is described
as Lot 1, Block 2 and 3, Tower 160 Subdivision, County of Denver, State of Colorado. For
Recording purposes: Southeast ¼ of Section 16, Township 3 South, Range 66 West, 6th P.M., City
of Denver, County of Denver, State of Colorado.
Located on the northwest corner of Green Valley Ranch Blvd and Tower road, the site contains
roughly 10.48 acres on the west side and 8.402 acres on the east side of Yampa Street. The site
is a vacant lot with native vegetation.
Stormwater from this site is currently released into the existing soil stratum. Since the site is
undeveloped any runoff would sheet flow towards the north portion of the site. The west lot
flows northeast and the east lot flows northwest, meeting roughly near the middle of the site.
Flow will then be outlet via a ditch and ultimately ends up to the Highline Detention Pond off site.
The runoff from this developed site is consistent with the assumptions used in the Infrastructure
Drainage Compliance Report by Ridgetop Engineering, dated August 10, 2018.
RECEIVING WATER NAME: HIGHLINE DETENTION POND VIA IRONDALE GULCH DITCH
DISTANCE FROM PROJECT TO THE RECEIVING WATER OUTFALL IS: ULTIMATE RECEIVING WATER IS THE EAST BRANCH
HIGHLINE CANAL AND IS APPROXIMATELY 0.75 MILES FROM THE SITE.
WETLAND IMPACTS? YES NO
STREAM IMPACTS? YES NO
THREATENED OR ENDANGERED SPECIES? YES NO [if yes please list]
Area Information:
The total acreage of disturbance, including all clearing, grading, excavation activities, areas
receiving overburden (e.g. stockpiles), demolition areas and areas with heavy equipment/vehicle
traffic and storage that will disturb existing vegetative cover is approximately 21.17 acres.
Total area (acres) of construction site: 18.88
Total area (acres) of disturbance on-site: 18.88
Total area (acres) of disturbance off-site: 2.29
Total area (acres) of disturbance: 21.17
Total area (acres) of impervious: 2.85
Total area (acres) of permanent landscaping: 0.35
Location and Description of Other Potential Pollution Sources:
Potential Pollutant Sources include sediment, uncovered soil, construction machinery, concrete
washouts, building materials, and fertilizers. It is anticipated that any storage of materials or
machinery will be on site and surrounded by silt fence and/or straw wattles.
Existing Vegetation & Features:
The site slopes north, towards Walden St and the Irondale Gulch Ditch, at a slope between an of
0.5% and 2%. The existing grasses are well established and have prevented any visible signs of
erosion onsite.
There are no other non-storm water flows onsite.
Groundwater was not observed at the time of boring.
The contractor shall identify on the SWMP permit a qualified SWMP Administrator.
THE STORMWATER MANAGEMENT PLAN
The SWMP will be implemented in three phases: 1) first construction activity, 2) during
construction, and 3) final stabilization.
Site Map Components
During construction items will be added as necessary to render the SWMP current, such
as:
1. Areas used for storage of building materials, soils or wastes.
3. Location of work access routes during construction.
4. Location of borrow and waste locations.
FIRST CONSTRUCTION ACTIVITY-BMP’S
Clearing and Grubbing is anticipated to begin near the beginning of 2019.
Prior to Work Commencing
Sediment control measures will be implemented in accordance with the approved schedule prior
to any construction.
Perimeter control will be established as the first item on the SWMP and as required on the
Erosions Control Plans and Detail sheets.
BMPs for other pollutants such as concrete truck washout and stockpiles will be identified and
implemented.
The locations of any additional BMPs will be added to the SWMP.
Offsite Drainage
The project site has very little stormwater runoff draining onto or through it. A curb and gutter
has already been constructed around the entire site, other then the two curb cuts, one on the
north and one on the south side of the site. Most offsite runoff will be caught in an inlet before
reaching these curb cuts.
If necessary, BMPs will be used to prevent off-site water from running on-site and becoming
contaminated with sediment or other pollutants or to divert off-site flows away from the project
site to prevent water contamination.
BMPs Installed
First Construction BMPs include:
• Perimeter Control:
o Silt Fence – As shown on the Erosion Control (EC) Plans, Silt fence shall be
installed as a temporary BMP in areas of sheet flow around the perimeter of
the site (and individual lots) where there is a potential for pollutants to leave
the site.
o Gravel Bags (Rock Socks) – This BMP shall be used to trap sediment from
stormwater runoff that flows along roadways or along curb and gutter.
o Construction Fence – This temporary BMP will be placed around the entire
perimeter of the site to serve a similar purpose as Silt Fence.
o Inlet Protection – This BMP shall be used to trap sediment from stormwater
runoff that flows along the curb and gutter towards existing and proposed
inlets.
o Dust Particulate of Wind-Blown Control – Measures shall be taken during
construction to control wind erosion and sediment. Water shall be applied
during earthwork activities in order to meet moisture requirements and to
reduce wind erosion. Disturbed areas shall be covered as timely as possible or
seeded to minimize the potential for wind erosion.
• Concrete Washout Basin:
o As shown on the EC Plans, a concrete washout area is designated in order to
receive wash water from washing of tools and equipment related to concrete
trucks, mixers, and pump trucks. Concrete washout areas may be lined or
unlined excavated pits in the ground, or commercially manufactured
containers and be maintained regularly to ensure proper operation.
Contractor to maintain Washout Basin in order to prevent wash water from
leaving the containment area. Dispose of concrete and wash water in
accordance with local, state, and federal laws.
• Rough Cut Street Control:
o This temporary BMP is a berm that will be placed along the proposed roadway
while overlot grading is occurring. This BMP will intercept sheet flow and will
divert runoff from the roadway. This will help reduce runoff velocities and
concentrated flows.
• Staging and Storage:
o As shown on the EC Plans, a Staging and Storage area has been placed near
the south entrance/exit. This area can be moved to complete construction.
This area will store equipment for construction out of the way and contained
to one area. This will help mitigate the spread of sediment.
• Stockpile Storage:
o A temporary area for stockpile storage has been indicated on the EC Plans, but
can move as necessary to complete construction. Silt Fence shall surround the
proposed area to prevent stockpile material from spreading onto the site.
• Vehicle Tracking Control:
o Two construction entrance/exits have been indicated on the ED Plans and shall
be installed at the exact entrance/exit location of construction vehicles. The
stone placed within this area is to reduce the amount of sediments leaving the
site.
o Should off-site tracking occur, all practicable measures to clean roads and
storm drainage ways, at a minimum by the end of each work day, will be
utilized.
• Temporary Sediment Basin
o Two temporary sediment basins have been indicated on the ED Plans and shall
be installed on both the east and west northern side of Yampa Street. Both
basins have an area of roughly 20,058 SF and a capacity of 35,511 CF. Each
sediment basin has a riser pipe with orifice dimensions of 3/8”.
o Runoff from the construction site will flow to these sediment basins and will
then outlet to the north of the site.
Identification of Potential Pollutant Sources:
The following activities and pollutant sources were evaluated:
• Disturbed and stored soils;
• Vehicle tracking controls;
• Management of Contaminated soils;
• Loading and unloading operations;
• Outdoor Storage activities;
• Vehicle and equipment maintenance and fueling;
• Dust or particulate generating processes or activities;
• Routine maintenance activities;
• On site waste management practices
• Concrete truck washing;
• Dedicated concrete and asphalt batch plants;
• Non-industrial waste sources;
• Potential spills;
1. Disturbed and stored soils:
a. Any disturbed surfaces will be left in a roughened condition at all times by
equipment tracking, scarifying or disking the surface. Any areas where work will be
halted must be temporarily stabilized as described later in this report. Stockpiled
soils shall be left in a surface roughened state.
2. Vehicle Tracking Controls:
a. Site fencing limits the inflow of vehicle’s traveling within the site and area of
disturbance, thus limiting the tracking of soils off site. Placing quarry spall type
material (as indicated on the detail) at the driveway entrance will help alleviate
any vehicle tracking of material off site. If excessive tracking is observed, the
contractor will address the tracking on the adjacent street via scraping and street
sweeping if necessary.
3. Management of Contaminated Soils:
a. Per the soils report no contaminated soils are anticipated on the excavation of
subject property. If contaminates are discovered additional BMP’s will be
implemented to ensure containment of any containment until such contaminant
can be disposed of safely and legally.
4. Loading and Unloading Operations:
a. The site fence and limits of disturbance direct the inflow of vehicle’s traveling
within the site. Contractors will be directed to park in designated areas only and
driving within the site will only be on an as needed basis.
5. Outdoor Storage Activities:
a. Very few substances will be stored on site regularly, those most common include
fuel and oil used for construction equipment. Other chemicals stored on site will
be evaluated on an as needed basis to determine the best course of action for
safe containment in the event of a spill.
6. Vehicle and Equipment Maintenance and Fueling
a. Vehicle maintenance or fueling on site is not anticipated. Fueling of small
construction equipment (generator, compressor, etc) will be done in an open area
with no more than a 5 gallon gas tank. Any fuel or oil spill will be cleaned up and
contained immediately to not allow any contaminants to make it into the storm
water or the ground water.
7. Dust and Particulate Generating Processes and Activities
a. Excavation will take place during the summer months, where dry, dusty soil could
present itself as an issue. Should dust become excessive, soil watering will
commence.
8. Routine Maintenance Activities:
a. Routine maintenance activities will seize once the construction activity begins.
The project site has been routinely maintained by a landscape maintenance
company for nuisance weeds, etc. Routine maintenance is not going to be
implemented until such time the site is fully stabilized and landscaped.
9. Off-Site Waste Management Practices:
a. All waste produced from construction activities will be handled by a local
sanitation company. A 30 yard dumpster will be stored on the site, near Old
Hackberry Road. The General Contractor will complete a Construction Waste
Management Plan with further details. No construction waste materials will be
buried, dumped, or discharge into any receiving waters.
10. Concrete Truck Washing:
a. A metal concrete washout container will be located on the project site. The
container will be enclosed in silt fence and regularly maintained. The container
will be located more than 50ft from any storm water inlet.
11. Dedicated Concrete and Asphalt Batch Plants
a. No concrete or asphalt batch plant will be located on site. 12. Non-Industrial Waste Sources:
a. Cleanup of any loose construction trash or debris will be addressed daily. The
site and the surrounding area will be patrolled for waste and disposed of in the
proper way as defined in the Construction Waste Management Plan.
b. Portable sanitary sewage facilities will be placed within the silt fence area and not
within 50ft of any storm water inlet. Any portable sanitary sewage facility will be
anchored down to avoid any potential leakage and serviced weekly.
13. Potential Spills
a. Spills and leaks will be immediately handled by the General Contractors employee or subcontractor in accordance to the EPA’s Spill Control and
Countermeasure Plan (SPCC). The SWMP administrator will be notified immediately of any spill or leak on site and respond the situation as best defined by the SPCC.
b. Weekly safety meetings will be conducted on site, material handling and spill
prevention will be highlighted throughout these meetings in an effort to prevent
and educate contractors on spill prevention and response.
c. Potential spills risk will be mitigated by not storing containment materials on site
regularly.
Details of all BMPs used on this project are included either on the Grading Plan, Detail Sheets
and/or within this SWMP.
DURING CONSTRUCTION-BMP’S
Grading and slope stabilization is anticipated to begin December 2018 .
Installation of utilities is anticipated to begin on January 2018 .
Stabilizing Disturbances
1. Disturbed surfaces will be left in a roughened condition at all times by equipment tracking,
scarifying or disking the surface on contour with a 2 to 4 inch minimum variation in soil
surface.
2. Disturbed areas where work is temporarily halted will be temporarily stabilized within 14
calendar days after activity has ceased unless work is to be resumed within 30 calendar days
after the activity ceased as authorized by the City Engineer.
3. During the seasons when seeding does not produce vegetative cover, temporary stabilization
will occur. Temporary stabilization will consist of 1.5 tons certified weed free forage per acre,
mechanically crimped into the soil in combination with an organic mulch tackifier.
4. Construction activities will be limited to those areas within the limits of disturbance as shown
on the plans. Off road staging areas or stockpiles must be pre-approved by the City of Arvada.
If necessary, disturbances beyond these limits will be restored to original condition as soon
as possible after construction work is completed.
5. The permittee will tabulate additional disturbances locations and quantities not identified in
the SWMP and add them to the SWMP.
Inspection and Maintenance of Erosion Control Devices
Inspections will be conducted at least every 7 days and after any significant precipitation event
where erosion may have occurred. Replacement of failed BMPs will be conducted immediately,
but no later than 24 hours. Maintenance of erosion control measures will be conducted within
7 days. Sediment will be cleaned out when silt depth is 50% or greater than the erosion control
device, or as directed by City staff.
BMPs Installed
Note that all BMPs installed during the Initial Phase of construction shall be maintained during
construction.
Additional BMPs installed during construction:
• Outlet Protection
• Additional Perimeter Control
o More Silt Fence will be added to the site at this phase due to the construction
of private and public roadways.
• Inlet Protection
o A new storm drain system with inlets will be placed on site during this phase.
Additional Inlet Protections will be used to mitigate sediment getting into the
new system.
Batch Plants
There are no asphalt or concrete batch plants planned for this site.
POST-CONSTRUCTION-BMP’S
Final Stabilization
Permanent Seeding or sod installation is anticipated to begin on September 2019 .
Final stabilization is anticipated to be completed on November 2019 .
Final Stabilization is reached when all ground surface disturbing activities at the site have been
completed, and uniform vegetative cover has been established with an individual plant density
of at least 70% of pre-disturbance levels, or equivalent permanent, physical erosion reduction
methods have been employed.
BMPs Installed
The Final Stabilization will consist of monitoring the landscaped slopes and BMPS until the
required germination has taken place. BMPS to remain in place include:
• Permanent Seeding and Planting – Establishment of permanent perennial vegetation
such as trees, shrubs, vines, grasses or sod, and/or erosion control blankets on exposed
areas for final stabilization by holding soil particles in place. Once established the
potential for erosion is limited and the vegetation promotes infiltration of the runoff.
See EC and Landscape Plans for locations and additional information.
• Preservation of Existing Vegetation – Preserving existing vegetation should occur where
no construction activity will take place. Preserving of existing/natural vegetation is
considered a permanent BMP and contractor shall take measures where possible to keep
areas undisturbed.
• Silt Fence and Rock Sock – Silt fence and rock socks at culverts shall remain in place until
permanent seeded has achieved 70% of the pre-disturbance level.
Potential Pollutants / Materials Handling and Spill Prevention
In accordance with the Record Keeping section below with regard to Spill Response, contractor
shall notify the following:
Non-Hazardous
CDPHE at 1-877-518-5608
Colorado State Patrol 24-hour hotline at 1-303-239-4501
Hazardous Materials
Local emergency response team by dialing 911
CDPHE at 1-877-518-5608
Colorado State Patrol 24-hour hotline at 1-303-239-4501
Any hazardous or potentially hazardous material that is brought onto the construction site shall
be handled properly to reduce the potential for stormwater pollution. All materials used on this
construction site shall be properly stored, handled, dispensed and disposed of following all
applicable label directions. Flammable and combustible liquids shall be stored and handled
according to applicable regulations, and, at a minimum, according to 29 cfr 1926.152. Only
approved containers and portable tanks shall be used for storage and handling of flammable and
combustible liquids.
Material safety data sheets (MSDS) information shall be kept on site for any and all applicable
materials. However, MSDS may also be accessed via telephone or other electronic means or
apparatus.
In the event of an accidental spill, immediate action shall be taken by the GC to contain and
remove the spilled material. The spill shall be reported to the appropriate agencies in the
required time frames. As required under the provisions of the clean water act, any spill or
discharge entering waters of the united states shall be properly reported.
All hazardous materials, including contaminated soil and liquid concrete waste, shall be disposed
of by the contractor in the manner specified by federal, state and local regulations and by the
manufacturer of such products.
The GC shall prepare a written record of any spill and associated clean-up activities of petroleum
products or hazardous materials in excess of 1 gallon or reportable quantities, whichever is less,
on the day of the spill. The GC shall provide notice to owner immediately upon identification of
any spill. Spill report forms can be obtained from Colorado Department of Public Health and
Environment. Copies of spill critical incident reports shall be printed and maintained in the
jobsite binder.
Any spills of petroleum products or hazardous materials in excess of reportable quantities as
defined by EPA or the state or local agency regulations, shall be immediately reported to the EPA
national response center (1-800-424-8802) and Colorado Department of Public Health and
Environment (877-518-5608).
The reportable quantity for petroleum products is:
Any spill or release of more than 25 gallons, or which results in a visible sheen on water, or a
visible deposit on the bottom or shoreline of any water body, must be reported within 24 hours.
Within seven (7) days following a release, submit a complete written report to the division
describing the reportable release and steps taken to prevent a reoccurrence.
The reportable quantity for hazardous materials can be found in 40 cfr 302 at:
Http://www.ecfr.gov/cgi-bin/text-
idx?c=ecfr&sid=1b97dc96a915b394c3275ae95ba797de&rgn=div5&view=text&node=40:29.0.1.
1.2&idno=40
To minimize the potential for a spill of petroleum product or hazardous materials to come in
contact with stormwater, the following steps shall be implemented:
1) All materials with hazardous properties, such as pesticides, petroleum products, fertilizers,
soaps, detergents, construction chemicals, acids, bases, paints, paint solvents, additives for
soil stabilization, concrete, curing compounds and additives, etc., shall be stored in a secure
location, under cover and in appropriate, tightly sealed containers when not in use.
2) The minimum practical quantity of all such materials shall be kept on the job site and
scheduled for delivery as close to time of use as practical.
3) A spill control and containment kit (containing for example, absorbent material such as kitty
litter or sawdust, acid, base, neutralizing agent, brooms, dust pans, mops, rags, gloves,
goggles, plastic and metal trash containers, etc.) Shall be provided at the construction site
and its location(s) shall be identified with legible signage and shown on site maps.
A. The spill control and containment kit supplies shall be of sufficient quantities and
appropriate content to contain a spill from the largest anticipated piece of equipment and
from the largest anticipated quantities of products stored on the site at any given time.
B. Contents shall be inspected daily during the daily stormwater inspection.
4) All products shall be stored in and used from the original container with the original product
label. Containers must be stored in a manner to protect them from the elements and
incidental damage.
5) All products shall be used in strict compliance with instructions on the product label.
6) The disposal of excess or used products shall be in strict compliance with instructions on the
product label and regulations.
Seeding Plan
The seeding of bare areas shall be as shown on the SWMP and the use of seed mix and rates
shown on the Landscape Plan.
Reseeding operations / corrective stabilization
Areas where seed has not germinated after one season will be evaluated by the City, and if
needed the contractor/owner shall reseed as necessary if required vegetative density is not
achieved. Areas that have not germinated will have seed, mulch and mulch tackifier (or blanket)
reapplied as required.
Inspection and Maintenance of Erosion Control Devices
Once construction activity has ceased and landscaping has been completed, but before final
stabilization of the site is accomplished, inspections can be reduced to once a month.
Replacement of failed BMPs will be conducted immediately, but no later than 24 hours after the
failure has been identified. Post storm inspections shall be conducted within 24 hours of any
precipitation event where erosion may have occurred. Maintenance of erosion control measures
will be conducted within 7 days. Sediment will be cleaned out when silt depth is 50% or greater
than the erosion control device.
Termination of the Construction Permit
BMPs will be removed and the Construction Permit terminated once 70% of preexisting cover
has been established within the disturbed project limits, and a final inspection by County staff
has occurred approving the removal of the temporary BMP’s.
RECORDKEEPING
1. Accurate and complete records will be kept, and maintained for three years after the Site
Development Permit is terminated.
2. The SWMP should be considered a "living document" that will be continuously reviewed and
modified, including but not limited to: additions, deletions, and changing locations of BMPs.
These changes will be marked in the plans, dated and signed at time of occurrence. The
SWMP shall be updated within 72 hours of changes occurring on site.
3. All inspection and maintenance activities or other repairs will be documented and the records
available for review by the City.
4. Records of spill, leaks or overflows that result in the discharge of pollutants must be
documented and maintained. Information that should be recorded for all occurrences include
the time and date, weather conditions, reasons for spill, etc. A release of any chemical, oil,
petroleum product, sewage, etc., which may enter state waters must be reported
immediately to the State of Colorado Spill Hotline at 1-877-518-5608.
2. Incidents of noncompliance, such as uncontrolled releases of pollutants including mud,
muddy water or measurable quantities of sediment found off-site will be noted, along with a
brief explanation as to measures taken to prevent future violations and measures taken to
clean up sediment that has left the site.
CORRECTIVE ACTION LOG
Create as an attachment, a corrective action log. This log should describe repair, replacement,
and maintenance of BMPs undertaken based on the inspections and maintenance procedures,
date completed, and note the person that completed the work. Actions related to the findings of
an inspection should reference the specific report.
This log will also describe changes and updates to the SWMP, including additions of new BMPs,
replacement of failed BMPs, significant changes in the activities or their timing on the project,
changes in personnel, changes in inspection and maintenance procedures, and updates to site
maps, etc.
TRAINING
Staff and subcontractors will be trained to identify stormwater BMPs and how to prevent
problems with them, such as not driving onsite unless through the vehicle tracking control or
taking care to not to damage BMPs. Documentation on training at safety meetings or otherwise
will be kept on file with the SWMP, including dates, number of attendees, subjects covered, and
length of the training.
FAILURE TO PERFORM
Failure to implement SWMP puts the project in automatic violation of the Construction Permit.
Failure to comply with the Colorado Department of Public Health and Environment Permit
requirements will constitute a violation by the Contractor. Civil penalties for violations can be up
to $10,000 per day, and a criminal pollution of state water is punishable by fines of up to $25,000
per day. For additional information, review the permit on file or go on-line to the CDPHE web
site at http:www.cdphe.state.co.us/wq/permitsunit/wqcdpmt.html.
Appendix A
Narrative Report Information Worksheet
Narrative Report Information Worksheet City and County of Denver, Demolition and Construction Activities Stormwater Management Plan (SWMP)
Revised 2/12/2013 as entry form
Name of Project or Development:
A. PROJECT LOCATION
CCD Master No. (if known): ___________________ CCD EC No. (If known): _________________________
Street Address:
Township: ________ Range: ________ Section: ________ Quarter Section: ________
Latitude (+/- 15”):__________________, Longitude (+/- 15”):_____________________
Metropolitan District:
B. PERMITTEE (Responsible party for day to day supervision and control of the MANAGMENT PLAN)
Company Name:
Mailing Address:
City, State, Zip Code:
Phone Number: (______)___________________ FAX Number (_______)__________________
Name of Contact:
Email:
Name:
C. OWNER (same as Permittee □ YES □ NO )
Mailing Address:
City, State, Zip Code:
Phone Number: (______) ___________________ FAX Number (_______) __________________
Name of Contact:
Denver, CO 80249
1
Gateway Crossing
2018PM0000117 2018-EC-0000177
18251 Green Valley Ranch Blvd and 4891 Tower Road
T3S R66W 16 SE
39.783919 -104.774481
Green Valley Ranch
Equity Ventures Commercial, Inc.
3501 SW Fairlawn Road, Ste 200
Topeka, KS 66614
785 272-1398 x106 785 272-1796
Kevin Beck
Email:
D. PLAN ENGINEER (prepared MANAGMENT PLAN)
Company Name:
Mailing Address:
City, State, Zip Code:
Phone Number: (______) __________________ FAX Number (_______) __________________
Name of Engineer:
Email:
E. SITE SUPERVISOR required prior to commencement of activities at site
Company Name:
Mailing Address:
City, State, Zip Code:
Phone Number: (______)___________________ FAX Number (_______)__________________
Name of Site Supervisor:
Email:
F. TYPE OF CONSTRUCTION
Check the appropriate description(s) or provide a brief description that indicates the general nature of the proposed construction. A full description of activities must be included in the Stormwater Management Plan. (see Section G below)
__ Single Family Residential Development __ Multi-Family Residential Development X Commercial Development __ Oil and Gas Production and/or Exploration (including pad sites and associated infrastructure) __ Highway/Road Development (not including roadways associated with commercial or residential Development) __ Other, Describe: ____________________________________________________________________________
2
Johnstown, CO 80534
970 663-4552
Mike Beach, PE.
TBD
Ridgetop Engineering & Consulting
5255 Ronald Reagan Blvd. Ste 210
1. Acreage
G. SITE DESCRIPTION
a. Total Site Acreage: _____________________________________________________b. Acreage Subject to Disturbance: ___________________________________________c. Acreage Determination (Public Utility Projects): ________________________________
Area bounded by predefined construction limits: ____________________________
Calculations shall include all areas proposed for contractor laydown, materials storage, equipment storage, areas where equipment repair and fueling will occur, ingress, and egress (include haul roads and borrow pits.)
2. Site Conditions:a. Historical Land Use: (may be for partial site)
Known Landfill site: YES _____ NO _____ Has any of the following activities occurred on-site:
Metal Refining YES _____ NO _____ Petroleum Refining YES _____ NO _____ Petroleum Storage YES _____ NO _____ Chemical Manufacturing YES _____ NO _____ Pesticide/Fertilizer Manufacture/Storage YES _____ NO _____ Rail Yard YES _____ NO _____
If the response to any of the above is YES, Please describe:
b. Potential Pollutants at site: Include in the text box below a discussion addressing all potential pollutants; at aminimum, each of the following sources and activities shall be evaluated for the potential to contributepollutants to stormwater discharges:
1. all disturbed and stored soils2. vehicle tracking of sediments;3. management of contaminated soils;4. loading and unloading operations;5. outdoor storage activities (building materials, fertilizers, chemicals etc.);6. vehicle and equipment maintenance and fueling;7. significant dust or particulate generating processes;8. routine maintenance activities involiving fertilizers, pesticideds, detergents, fuels, solvents, etc.;9. on-site waste management practices (waste piles, liquid wastes, dumpsters, etc.);10. concrete truck/equipment washing;11. dedicated asphalt and concrete batch plants;12. non-industrial waste sources such as worker trash and portable toilets; and13. other areas or procedures where potential spills can occur.
3
18.88 AC
21.17 AC
n/a
n/a
X
X
X
X
X
X
X
n/a
The above listed potential pollutants have been considered and will be prevented by Best Management Practices, including silt fences, vehicle tracking control, inlet protection, site stabilization, chute washout containment, construction fence, etc.
Possible Site Contamination: Is the site part of any of the following:
Known Denver Radium Site YES _____ NO _____ Known Denver LUST Site YES _____ NO _____ Known Superfund Site YES _____ NO _____ Known CERCLA Site YES _____ NO _____ Known RCRA Site YES _____ NO _____
If the response to any of the preceding is YES, Please describe:
Describe any other known site contamination:
c. Current Land Use:
Describe existing use: ______________________________________________________________
Are there any building/structures on-site? YES _____ NO _____
d. Existing and Proposed Topography (minimum 2 foot contours)Description:________________________________________________________________________
Highest Elevation: ________________ Lowest Elevation: _________________
Steepest Slope: __________________ Average Slope: ___________________
Direction________________________
e. Vegetation
Identify the types of vegetation found on-site:
Estimate the existing density of vegetation:
Submittal of Photographs is not required but highly recommended
f. Drainage:Identify all adjacent surface water flows (run-on) that may impact and/or runoff from the subject site:
Identify the State Receiving Waters:
Describe the flow routing from the site to the Receiving Waters:
Are there any springs or seeps located on-site? YES _____ NO _____ Are there any defined drainage channels on-site? YES _____ NO _____
& First Creek
4
X
X
X
X
X
N/A
N/A
Open Space, not developed
X
Relatively flat area, flows to the north. Proposed plan has the same flow pattern
Pr: 5383.5, Ex: 5385.4 Pr: 5371.2, Ex: 5372.0
Pr: 4.0%, Ex: 6% Pr: 1.5%, Ex: 2.0%
North, Northwest
Native Grass, no trees
Not dense, please see photographs in Appendix C
None.
Nott Lake, Landora Lake, Lake Mary, Reservoir C, Reservoir D, South Platte R.
Runs north to detention pond across Walden Street & then to receiving waters
X
X
Does the site fall within a Regulatory Floodplain? YES _____ NO _____ Have you obtained a floodplain permit YES _____ NO _____
If Yes SUDP # ___________________________ Dewatering: Reference state permit page 9, item C.8 groundwater/stormwater dewatering
g. Wetlands: Define the dimensions/surface areas for each identified wetland and its location relative to the site.Identify all on-site wetlands/wetlands channels:
1. _______________________________________________________________
2. _______________________________________________________________
3. _______________________________________________________________
Tributary or adjacent Wetlands Areas Upstream of the site? YES _____ NO _____
Downstream of the site? YES _____ NO _____ Will the proposed construction work impact any of the on-site wetland areas? YES_____ NO _____
If the answer is YES, attach copies of correspondence with the State of Colorado and U.S. Army Corps of Engineers concerning permits and approvals for the work.
h. Soils:Identify the predominant Hydrologic Soil Group found on-site. A _____ B_____ C _____ D _____
What is the runoff coefficient for the undeveloped site?
Provide brief description of soils on site (e.g. Sandy, clayey etc)
Is there any outcropping of bedrock on-site? YES_____ NO _____ Will grading or excavation on-site reach bedrock? YES _____ NO _____
If YES, what is the depth of the bedrock? __________________________ Will grading or excavation penetrate the Water Table? YES _____ NO_____
If YES, what is the depth of the Water Table? ____________________________
5
X
X
N/A
Freshwater Emergent Wetland - PEM1Cx
Riverine - R4SBCx
X
X
X
X
0.30 to 0.45 in/hr
Trunkton Loamy Sand, please see Appendix A for Soils information.
X
X
X
i. Erosion Potential:
Provide estimates of the potential annual soil loss from the site for the following conditions: Erosion by water from an unprotected site_______ tons per acre per year.
Erosion by water from a protected * site _______ tons per acre per year
Identify the procedures/formulas used to produce these estimates. If the Universal Soil Loss Equation (USLE) has been used, provide the values used for the following: R (Annual Erosion Index) _______________________________________ K (Soil Erodibility Factor) _______________________________________ LS (Length/percent Slope Factor) ________________________________ C (Soil Cover Factor) _______________________________________ Provide estimates of the potential annual soil loss from the site for the following conditions: Erosion by wind from an unprotected site _______ tons per acre per year. Erosion by wind from a protected* site _______ tons per acre per year Identify the procedures/formulas used to produce these estimates.
Protected site: calculations shall be based on the BMPs proposed for use on the site
H. PROJECT DESCRIPTION – CONSTRUCTION ACTIVITIES1. Proposed Construction ActivitiesIdentify which of the following activities will occur during development of the site:
a. Clearing and Grubbing YES_____ NO_____ b. Mass Overlot Grading YES_____ NO_____ c. Cut Operations YES_____ NO_____
If YES, estimate volume of cut (cubic yards) _______________________ d. Fill Operations YES_____ N0_____
If YES, estimate volume of fill (cubic yards) _______________________
*If a offsite borrow or stockpile area is used it must be included in this SWMP or have separate permitcoverage
e. Building Demolition YES_____ NO_____
f. Foundation Excavation YES_____ NO_____
g. Utility Construction YES_____ NO_____ h. Street Construction and Paving YES_____ NO_____ i. Building Construction YES_____ NO_____ j. Parking Lot Construction/Paving YES_____ NO_____ k. Landscaping YES_____ NO_____ Will Private Storm and Sanitary Sewer systems be constructed? YES_____ NO_____ Will Private Storm and Sanitary Sewer systems be constructed? YES_____ NO_____
If YES, identify the SP or PR Project Numbers assigned* by WMD for each project
If sewers are private or being constructed by a governmental agency other than Public Works, list the agency and associated Project number(s)__________________________________________________
USDA Web Soil Survey Map - Please see attached.
6
150
2
N/A
N/A
N/A
N/A
5
3
X
X
X
19,151 CY
X
7,026 CY
X
X
X
X
X
X
X
X
X
2018-SSPR-0000151
*if Public Works Project Numbers have not been assigned but will be in the future, please indicate as “NotAssigned.”
2. Construction Scheduling (Corresponds with Construction Phasing below)a. Site Preparation / Grading Operations
Proposed Start Date: _________________________________Proposed Completion Date: ____________________________
b. Utility / Infrastructure / Building Constructioni. Utilities:
Proposed Start Date: ______________________________ Proposed Completion Date: _________________________
ii. Infrastructure Construction:Proposed Start Date: ______________________________Proposed Completion Date: _________________________
iii. Building Construction:Proposed Start Date: ______________________________Proposed Completion Date: _________________________
c. Landscaping/Site StabilizationProposed Start Date: __________________________________Proposed Completion Date: _____________________________
3. Construction Phasing - Denver recognizes 3 basic phases for all construction sites as outline below.
(Note: A map or drawing for each phase is required, showing required BMPs for that phase Address the installation and maintenance of all proposed erosion control measures, sediment/pollutant control measures, and site stabilization measures for each phase. Add additional sheets to the worksheet if needed.)
a. Site Preparation/Gradingi. Describe the types and placements of proposed BMPs for use during clearing, grubbing, demolition,
and grading operations.
ii. Describe all measures proposed for interim site stabilization.
iii. Describe the inspection and maintenance schedule proposed for BMPs on-site.
b. Utility/Infrastructure/Building Constructioni. Describe the types and placements of proposed BMPs for use during utility construction, roadway
construction, building construction and paving operations.
7
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
VTC at entrances and exits, SF around property, CWA near the exit/entrance, staging and storage area, stockpile storage, construction fence
Comply with all measures within the City and County of Denver Construction Activities Stormwater Manual
Comply with Field Inspection Sequence provided by the City and County of Denver Construction Activities Stormwater Manual
VTC at entrances and exits, SF around property, CWA near the exit/entrance, staging and storage area, inlet protection at all inlets
ii. Describe all measures proposed for interim site stabilization.
iii. Describe the inspection and maintenance schedule proposed for BMPs on-site
c. Permanent Site Stabilization/Landscaping
i. Describe the types and placements of BMPs proposed for use during site stabilization andlandscaping, as well as describing all permanent water quality enhancement facilities.
ii. Describe all measures proposed for final site stabilization.
iii. Describe the inspection and maintenance schedule proposed for BMPs on-site.
iv. Identify any annual grasses proposed for use in stabilizing the site.
v. List the perennial grasses seed mix proposed for site stabilization
8
Comply with all measures within the City and County of Denver Construction Activities Stormwater Manual
Comply with Field Inspection Sequence provided by the City and County of Denver Construction Activities Stormwater Manual
Permanent native landscaping will be provided. Temporary landscaping will be provided in undeveloped areas.
Comply with all measures within the City and County of Denver Construction Activities Stormwater Manual
Comply with Field Inspection Sequence provided by the City and County of Denver Construction Activities Stormwater Manual
TBD
TBD
vi. Identify the estimated date for seeding
I. Required Best Management Practices (BMP)As listed, under Section 4 of Information Guide document1. Vehicle Tracking Control (See Erosion Control Detail)2. Inlet Protection (See Erosion Control Detail)3. Site Stabilization (Sediment Control Narrative)4. Spill Prevention/Containment (Sediment Control Narrative) - (See Attached Narrative)5. Chute Washout Containment (See Erosion Control Detail)6. Street Sweeping (See Standard Note #10)7. Perimeter Control (See Erosion Control Details)8. Portable Toilets
J. Maintenance, Inspections & Record Keeping (See Standard Note #7)Additional Maintenance, Inspection & Record Keeping Instructions: (If needed, See attached Narrative)
9
Please see Report for more information on the BMP's used for this specific site.
Permitee or contractor shall provide written inspection reports every seven (7) days and after significant precipitation events. All necessary maintenance and repair shall be completed immediately.
TBD
K. Post Construction Permanent Water QualityIdentify permanent water quality BMPs proposed for site sediment control:1. Grass Buffer YES_____ NO_____ 2. Grass Swale YES_____ NO_____ 3. Modular Block Porous Pavement YES_____ NO_____ 4. Porous Pavement Detention YES_____ NO_____ 5. Porous Landscape Detention YES_____ NO_____ 6. Extended Detention Basin YES_____ NO_____ 7. Sand Filter Extended Detention Basin YES_____ NO_____8. Constructed Wetlands Basin YES_____ NO_____ 9. Retention Pond YES_____ NO_____ 10. Constructed Wetlands Channel YES_____ NO_____ 11. Innovative/Proprietary Technology * YES_____ NO_____
*Use of Innovative/Proprietary Technology will require the submission of the technology developer’stechnical data, specifications, design criteria and installation requirements for review.
M. Required Drawing Plans for each phase - at a minimum these drawings shall include:
o Cover Pageo Project Titleo Erosion Control Number (EC-20XX-XXX)o Vicinity Mapo Standard Notes
o Initial Phaseo Existing Topography extended 100’ beyond the property boundaryo Location of Existing Structures on-siteo Locations of nearby floodplainso Limits of construction site boundarieso Limits of grading and clearingo Locations of storage areaso Locations of contaminated areaso Locations of construction entranceso Locations for all storm runoff discharge points at site boundaries or onsite drainagewayso Locations for all proposed initial BMPs
o Infrastructure Phase (as applicable)o Existing & Proposed Topography extended 100’ beyond the property boundaryo Location of Existing Structures on-siteo Limits of construction site boundarieso Locations of storage areaso Locations of contaminated areaso Locations of construction entranceso Locations for all storm runoff discharge points at site boundaries or onsite drainagewayso Locations for all proposed initial & infrastructure BMPs
o Vertical Phase (as applicable)o Existing & Proposed Topography extended 100’ beyond the property boundaryo Location of Existing & Proposed Structures on-siteo Limits of construction site boundarieso Locations of storage areaso Locations of contaminated areaso Locations of construction entrances
10
X
X
X
X
X
X
X
X
X
X
X
o Locations for all storm runoff discharge points at site boundaries or onsite drainageways o Locations for all proposed initial, infrastructure & vertical BMPs
o Final Grading Phase (as applicable) o Existing & Proposed Topography extended 100’ beyond the property boundary o Location of Existing & Proposed Structures on-site o Limits of construction site boundaries o Locations of storage areas o Locations of contaminated areas o Locations of construction entrances o Locations for all storm runoff discharge points at site boundaries or onsite drainageways o Locations for all proposed initial, infrastructure, vertical & final grading BMPs
o Final Stabilization Phase o Existing & Proposed Topography extended 100’ beyond the property boundary o Location of Existing & Proposed Structures on-site o Limits of construction site boundaries o Locations of contaminated areas o Locations for all proposed Final Stabilization Phase BMPs o Locations of all permanent water quality BMPs
11
L. Certifications
1. Engineer’s Certification - Plans submitted for review need to bear a P.E. Stamp, signature, and a P.E.‘sCertification Note
Engineer’s Certification:
“I hereby certify that this Construction Activities Stormwater Management Plan for
______________________, Project # EC-_______________ was prepared by me (or under my direct supervision) in accordance with the provisions of the Construction Activities Stormwater Discharge
Permit for the City and County of Denver. I understand that the City and County of Denver does not and will not assume liability for drainage facilities design.”
_____________________________ Colorado Registered PE# ______________
Date_____________
Project Design Engineer
2. Owner’s Certification Note using the following language and signed by owner or authorized agent.
Owner’s Certification: “This Construction Activities Stormwater Management Plan has been submitted as the application for a Construction Activities Stormwater Discharge Permit filed with the Wastewater Management Division of the City and County of Denver. I understand that additional erosion control, sediment control and water quality enhancing measures may be required of the owner and his or her agents due to unforeseen pollutant discharges or if the submitted plan does not function as intended. The requirements of this plan shall be the obligation of the land owner and/or his successors or heirs; until such time as the plan is properly completed, modified, or voided.”
__________________________________________________
Date________________
Owner or Authorized Agent Representing Owner
12
Appendix B
NRCS Soils Map
United StatesDepartment ofAgriculture
A product of the NationalCooperative Soil Survey,a joint effort of the UnitedStates Department ofAgriculture and otherFederal agencies, Stateagencies including theAgricultural ExperimentStations, and localparticipants
Custom Soil Resource Report forAdams County Area, Parts of Adams and Denver Counties, Colorado
NaturalResourcesConservationService
August 6, 2018
PrefaceSoil 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 (https://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
2
alternative means 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
ContentsPreface.................................................................................................................... 2How Soil Surveys Are Made..................................................................................5Soil Map.................................................................................................................. 8
Soil Map................................................................................................................9Legend................................................................................................................10Map Unit Legend................................................................................................ 12Map Unit Descriptions........................................................................................ 12
Adams County Area, Parts of Adams and Denver Counties, Colorado..........14TtB—Truckton loamy sand, 0 to 3 percent slopes.......................................14
Soil Information for All Uses...............................................................................16Soil Properties and Qualities.............................................................................. 16
Soil Erosion Factors........................................................................................16K Factor, Whole Soil....................................................................................16T Factor....................................................................................................... 20Wind Erodibility Group.................................................................................24Wind Erodibility Index..................................................................................28
Soil Qualities and Features.............................................................................32Hydrologic Soil Group................................................................................. 32
References............................................................................................................38
4
How Soil Surveys Are MadeSoil 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
5
scientists classified and named the soils in the survey area, they compared the 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
Custom Soil Resource Report
6
identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately.
Custom Soil Resource Report
7
Soil MapThe 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.
8
9
Custom Soil Resource ReportSoil Map
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
39° 47' 11'' N10
4° 4
6' 4
0'' W
39° 47' 11'' N
104°
46'
18'
' W
39° 47' 0'' N
104°
46'
40'
' W
39° 47' 0'' N
104°
46'
18'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS840 100 200 400 600
Feet0 35 70 140 210
MetersMap Scale: 1:2,420 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)Area of Interest (AOI)
SoilsSoil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point FeaturesBlowout
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 FeaturesStreams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at 1:20,000.
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 ServiceWeb Soil Survey URL: 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 the version date(s) listed below.
Soil Survey Area: Adams County Area, Parts of Adams and Denver Counties, ColoradoSurvey Area Data: Version 14, Oct 5, 2017
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jun 10, 2014—Aug 21, 2014
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
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MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
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11
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
TtB Truckton loamy sand, 0 to 3 percent slopes
21.4 100.0%
Totals for Area of Interest 21.4 100.0%
Map Unit DescriptionsThe 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 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.
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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
13
Adams County Area, Parts of Adams and Denver Counties, Colorado
TtB—Truckton loamy sand, 0 to 3 percent slopes
Map Unit SettingNational map unit symbol: 34wyElevation: 4,400 to 6,000 feetMean annual precipitation: 13 to 15 inchesMean annual air temperature: 48 to 52 degrees FFrost-free period: 125 to 155 daysFarmland classification: Farmland of statewide importance
Map Unit CompositionTruckton and similar soils: 80 percentMinor components: 20 percentEstimates are based on observations, descriptions, and transects of the mapunit.
Description of Truckton
SettingLandform: PlainsLandform position (three-dimensional): TalfDown-slope shape: LinearAcross-slope shape: LinearParent material: Eolian deposits derived from mixed
Typical profileH1 - 0 to 9 inches: loamy sandH2 - 9 to 21 inches: sandy loamH3 - 21 to 32 inches: loamy sandH4 - 32 to 60 inches: coarse sand
Properties and qualitiesSlope: 0 to 3 percentDepth to restrictive feature: More than 80 inchesNatural drainage class: Well drainedRunoff class: Very lowCapacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00
in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water storage in profile: Low (about 4.3 inches)
Interpretive groupsLand capability classification (irrigated): 3eLand capability classification (nonirrigated): 4cHydrologic Soil Group: AEcological site: Sandy Plains (R067BY024CO)Hydric soil rating: No
Minor Components
BlakelandPercent of map unit: 10 percentHydric soil rating: No
Custom Soil Resource Report
14
VonaPercent of map unit: 7 percentHydric soil rating: No
TryonPercent of map unit: 2 percentLandform: SwalesHydric soil rating: Yes
LoupPercent of map unit: 1 percentLandform: SwalesHydric soil rating: Yes
Custom Soil Resource Report
15
Soil Information for All Uses
Soil Properties and QualitiesThe Soil Properties and Qualities section includes various soil properties and qualities displayed as thematic maps with a summary table for the soil map units in the selected area of interest. A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components. This aggregation process is defined for each property or quality.
Soil Erosion Factors
Soil Erosion Factors are soil properties and interpretations used in evaluating the soil for potential erosion. Example soil erosion factors can include K factor for the whole soil or on a rock free basis, T factor, wind erodibility group and wind erodibility index.
K Factor, Whole Soil
Erosion factor K indicates the susceptibility of a soil to sheet and rill erosion by water. Factor K is one of six factors used in the Universal Soil Loss Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE) to predict the average annual rate of soil loss by sheet and rill erosion in tons per acre per year. The estimates are based primarily on percentage of silt, sand, and organic matter and on soil structure and saturated hydraulic conductivity (Ksat). Values of K range from 0.02 to 0.69. Other factors being equal, the higher the value, the more susceptible the soil is to sheet and rill erosion by water.
"Erosion factor Kw (whole soil)" indicates the erodibility of the whole soil. The estimates are modified by the presence of rock fragments.
16
17
Custom Soil Resource ReportMap—K Factor, Whole Soil
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
39° 47' 11'' N10
4° 4
6' 4
0'' W
39° 47' 11'' N
104°
46'
18'
' W
39° 47' 0'' N
104°
46'
40'
' W
39° 47' 0'' N
104°
46'
18'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS840 100 200 400 600
Feet0 35 70 140 210
MetersMap Scale: 1:2,420 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)Area of Interest (AOI)
SoilsSoil Rating Polygons
.02
.05
.10
.15
.17
.20
.24
.28
.32
.37
.43
.49
.55
.64
Not rated or not available
Soil Rating Lines.02
.05
.10
.15
.17
.20
.24
.28
.32
.37
.43
.49
.55
.64
Not rated or not available
Soil Rating Points.02
.05
.10
.15
.17
.20
.24
.28
.32
.37
.43
.49
.55
.64
Not rated or not available
Water Features
Streams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at 1:20,000.
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 ServiceWeb Soil Survey URL: 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 the version date(s) listed below.
Soil Survey Area: Adams County Area, Parts of Adams and Denver Counties, ColoradoSurvey Area Data: Version 14, Oct 5, 2017
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jun 10, 2014—Aug 21, 2014
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
Custom Soil Resource Report
18
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Custom Soil Resource Report
19
Table—K Factor, Whole Soil
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
TtB Truckton loamy sand, 0 to 3 percent slopes
.10 21.4 100.0%
Totals for Area of Interest 21.4 100.0%
Rating Options—K Factor, Whole Soil
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Layer Options (Horizon Aggregation Method): Surface Layer (Not applicable)
T Factor
The T factor is an estimate of the maximum average annual rate of soil erosion by wind and/or water that can occur without affecting crop productivity over a sustained period. The rate is in tons per acre per year.
Custom Soil Resource Report
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21
Custom Soil Resource ReportMap—T Factor
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
39° 47' 11'' N10
4° 4
6' 4
0'' W
39° 47' 11'' N
104°
46'
18'
' W
39° 47' 0'' N
104°
46'
40'
' W
39° 47' 0'' N
104°
46'
18'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS840 100 200 400 600
Feet0 35 70 140 210
MetersMap Scale: 1:2,420 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)Area of Interest (AOI)
SoilsSoil Rating Polygons
1
2
3
4
5
Not rated or not available
Soil Rating Lines1
2
3
4
5
Not rated or not available
Soil Rating Points1
2
3
4
5
Not rated or not available
Water FeaturesStreams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at 1:20,000.
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 ServiceWeb Soil Survey URL: 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 the version date(s) listed below.
Soil Survey Area: Adams County Area, Parts of Adams and Denver Counties, ColoradoSurvey Area Data: Version 14, Oct 5, 2017
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jun 10, 2014—Aug 21, 2014
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
Custom Soil Resource Report
22
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Custom Soil Resource Report
23
Table—T Factor
Map unit symbol Map unit name Rating (tons per acre per year)
Acres in AOI Percent of AOI
TtB Truckton loamy sand, 0 to 3 percent slopes
5 21.4 100.0%
Totals for Area of Interest 21.4 100.0%
Rating Options—T Factor
Units of Measure: tons per acre per year
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Lower
Interpret Nulls as Zero: No
Wind Erodibility Group
A wind erodibility group (WEG) consists of soils that have similar properties affecting their susceptibility to wind erosion in cultivated areas. The soils assigned to group 1 are the most susceptible to wind erosion, and those assigned to group 8 are the least susceptible.
Custom Soil Resource Report
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25
Custom Soil Resource ReportMap—Wind Erodibility Group
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
39° 47' 11'' N10
4° 4
6' 4
0'' W
39° 47' 11'' N
104°
46'
18'
' W
39° 47' 0'' N
104°
46'
40'
' W
39° 47' 0'' N
104°
46'
18'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS840 100 200 400 600
Feet0 35 70 140 210
MetersMap Scale: 1:2,420 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)Area of Interest (AOI)
SoilsSoil Rating Polygons
1
2
3
4
4L
5
6
7
8
Not rated or not available
Soil Rating Lines1
2
3
4
4L
5
6
7
8
Not rated or not available
Soil Rating Points
1
2
3
4
4L
5
6
7
8
Not rated or not available
Water FeaturesStreams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at 1:20,000.
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 ServiceWeb Soil Survey URL: 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 the version date(s) listed below.
Soil Survey Area: Adams County Area, Parts of Adams and Denver Counties, ColoradoSurvey Area Data: Version 14, Oct 5, 2017
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jun 10, 2014—Aug 21, 2014
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
Custom Soil Resource Report
26
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Custom Soil Resource Report
27
Table—Wind Erodibility Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
TtB Truckton loamy sand, 0 to 3 percent slopes
2 21.4 100.0%
Totals for Area of Interest 21.4 100.0%
Rating Options—Wind Erodibility Group
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Lower
Wind Erodibility Index
The wind erodibility index is a numerical value indicating the susceptibility of soil to wind erosion, or the tons per acre per year that can be expected to be lost to wind erosion. There is a close correlation between wind erosion and the texture of the surface layer, the size and durability of surface clods, rock fragments, organic matter, and a calcareous reaction. Soil moisture and frozen soil layers also influence wind erosion.
Custom Soil Resource Report
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29
Custom Soil Resource ReportMap—Wind Erodibility Index
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
39° 47' 11'' N10
4° 4
6' 4
0'' W
39° 47' 11'' N
104°
46'
18'
' W
39° 47' 0'' N
104°
46'
40'
' W
39° 47' 0'' N
104°
46'
18'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS840 100 200 400 600
Feet0 35 70 140 210
MetersMap Scale: 1:2,420 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)Area of Interest (AOI)
SoilsSoil Rating Polygons
0
38
48
56
86
134
160
180
220
250
310
Not rated or not available
Soil Rating Lines0
38
48
56
86
134
160
180
220
250
310
Not rated or not available
Soil Rating Points0
38
48
56
86
134
160
180
220
250
310
Not rated or not available
Water FeaturesStreams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at 1:20,000.
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 ServiceWeb Soil Survey URL: 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 the version date(s) listed below.
Soil Survey Area: Adams County Area, Parts of Adams and Denver Counties, ColoradoSurvey Area Data: Version 14, Oct 5, 2017
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jun 10, 2014—Aug 21, 2014
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
Custom Soil Resource Report
30
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Custom Soil Resource Report
31
Table—Wind Erodibility Index
Map unit symbol Map unit name Rating (tons per acre per year)
Acres in AOI Percent of AOI
TtB Truckton loamy sand, 0 to 3 percent slopes
134 21.4 100.0%
Totals for Area of Interest 21.4 100.0%
Rating Options—Wind Erodibility Index
Units of Measure: tons per acre per year
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly measured, but are inferred from observations of dynamic conditions and from soil properties. Example soil qualities include natural drainage, and frost action. Soil features are attributes that are not directly part of the soil. Example soil features include slope and depth to restrictive layer. These features can greatly impact the use and management of the soil.
Hydrologic Soil Group
Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission.
Custom Soil Resource Report
32
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes.
Custom Soil Resource Report
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34
Custom Soil Resource ReportMap—Hydrologic Soil Group
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
4403
760
4403
810
4403
860
4403
910
4403
960
4404
010
4404
060
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
519020 519070 519120 519170 519220 519270 519320 519370 519420 519470 519520
39° 47' 11'' N10
4° 4
6' 4
0'' W
39° 47' 11'' N
104°
46'
18'
' W
39° 47' 0'' N
104°
46'
40'
' W
39° 47' 0'' N
104°
46'
18'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS840 100 200 400 600
Feet0 35 70 140 210
MetersMap Scale: 1:2,420 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)Area of Interest (AOI)
SoilsSoil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating LinesA
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating PointsA
A/D
B
B/D
C
C/D
D
Not rated or not available
Water FeaturesStreams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at 1:20,000.
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 ServiceWeb Soil Survey URL: 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 the version date(s) listed below.
Soil Survey Area: Adams County Area, Parts of Adams and Denver Counties, ColoradoSurvey Area Data: Version 14, Oct 5, 2017
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jun 10, 2014—Aug 21, 2014
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
Custom Soil Resource Report
35
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Custom Soil Resource Report
36
Table—Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
TtB Truckton loamy sand, 0 to 3 percent slopes
A 21.4 100.0%
Totals for Area of Interest 21.4 100.0%
Rating Options—Hydrologic Soil Group
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Custom Soil Resource Report
37
ReferencesAmerican 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
38
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
39
Appendix C
Erosion and Sediment Control Plan Set
ACC
“ ”
CITY AND COUNTY OF DENVER STANDARD EROSION CONTROL NOTES
COVER SHEET
CN-1.0
1 7
EARTHWORK
Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
TO
WE
R R
D
GREEN VALLEY
RANCH BLVD
49TH AVE
WA
LD
EN
ST
GREEN VALLEY
RANCH BLVD
49TH AVE
ACC
INITIAL
EROSION
CONTROL
ER-1.0
2
EROSION DETAILSLEGENDLEGEND
ACREAGE SUMMARY (IN ACRES)
7Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
TO
WE
R R
D
GREEN VALLEY
RANCH BLVD
49TH AVE
WA
LD
EN
ST
GREEN VALLEY
RANCH BLVD
49TH AVE
ACC
INTERIM
EROSION
CONTROL
ER-1.1
3
LEGENDLEGEND
ACREAGE SUMMARY (IN ACRES)
7
EROSION DETAILS
Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
TO
WE
R R
D
GREEN VALLEY
RANCH BLVD
49TH AVE
WA
LD
EN
ST
GREEN VALLEY
RANCH BLVD
49TH AVE
TO
WE
R R
D
GREEN VALLEY
RANCH BLVD
49TH AVE
WA
LD
EN
ST
GREEN VALLEY
RANCH BLVD
49TH AVE
ACC
FINAL
EROSION
CONTROL
ER-1.2
4
ACREAGE SUMMARY (IN ACRES)
LEGEND
EROSION DETAILS
SEEDING NOTE:
7Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
ACC
VEHICLE TRACKING
CONTROL1
SILT FENCE2
INLET PROTECTION3
CONCRETE
WASHOUT AREA4
STAILIZED
STAGING AREA5
EROSION
CONTROL
DETAILS
ER-2.0
5 7Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
ACC
ROUGH CUT
STREET CONTROL1
EROSION
CONTROL
DETAILS
ER-2.1
6 7
CONSTRUCTION FENCE2
STOCKPILE MANAGEMENT3
ROCK SOCK4
Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
ACC
SEDIMENT BASIN1
EROSION
CONTROL
DETAILS
ER-2.2
7 7
SURFACE
ROUGHENING2
Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
SEAL
DATE
PREPARED FOR
R TIDGE OPENGINEERING & CONSULTING5255 Ronald Reagan Blvd.,Ste. 210Johnstown, CO 80534
T (970) 663-4552W ridgetopeng.com
COMMENTS 10/31/18
DRAWN BY:
CHECKED BY:
PROJECT NO.:
GATEWAY
CROSSING
NW CORNER OF GREEN
VALLEY RANCH BLVD &
TOWER RD
18-064-001
MRB
SUBMITTAL
CASDP SUBMITTAL
08/10/2018
LOGO
Know what's below.before you dig.Call
R
CITY AND
COUNTY OF
DENVER
PUBLIC WORKS
DEVELOPMENT
ENGINEERING SERVICES
PM PROJECT NO.
2018PM0000117
EVC-WDG
TOWER, LLC
3501 SW FAIRLAWN RD
SUITE 200
TOPEKA, KANSAS 66614
COMMENTS 12/13/18
Appendix D
Site Photos
Picture 1: Taken along Walden Street facing southwest
Picture 2: Taken along Walden Street facing west
Picture 3: Taken along Walden Street facing south
Picture 4: Taken along Walden Street facing west/southwest