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:


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 protected]

Email:

D. PLAN ENGINEER (prepared MANAGMENT PLAN)

Company Name:

Mailing Address:


Phone Number: (______) __________________ FAX Number (_______) __________________

Name of Engineer:

Email:

E. SITE SUPERVISOR required prior to commencement of activities at site

Company Name:

Mailing Address:


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.

[email protected]

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



Permanent native landscaping will be provided. Temporary landscaping will be provided in undeveloped areas.



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

http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/health/

http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/health/

https://offices.sc.egov.usda.gov/locator/app?agency=nrcs

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?cid=nrcs142p2_053951

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?cid=nrcs142p2_053951

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.


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


10


imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.


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.


12

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.


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


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


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


Feet0 35 70 140 210





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


Soil Rating Points.02

.05

.10

.15

.17

.20

.24

.28

.32

.37

.43

.49

.55

.64


Water Features

Streams and Canals

TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads














18




19

Table—K Factor, Whole Soil

Map unit symbol Map unit name Rating Acres in AOI Percent of AOI


.10 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.


20

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


Feet0 35 70 140 210






1

2

3

4

5


Soil Rating Lines1

2

3

4

5


Soil Rating Points1

2

3

4

5



TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads














22




23

Table—T Factor

Map unit symbol Map unit name Rating (tons per acre per year)

Acres in AOI Percent of AOI


5 21.4 100.0%


Rating Options—T Factor

Units of Measure: tons per acre per year



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.


24

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


Feet0 35 70 140 210






1

2

3

4

4L

5

6

7

8


Soil Rating Lines1

2

3

4

4L

5

6

7

8


Soil Rating Points

1

2

3

4

4L

5

6

7

8



TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads














26




27

Table—Wind Erodibility Group



2 21.4 100.0%


Rating Options—Wind Erodibility Group



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.


28

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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


Feet0 35 70 140 210






0

38

48

56

86

134

160

180

220

250

310


Soil Rating Lines0

38

48

56

86

134

160

180

220

250

310


Soil Rating Points0

38

48

56

86

134

160

180

220

250

310



TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads














30




31

Table—Wind Erodibility Index

Map unit symbol Map unit name Rating (tons per acre per year)

Acres in AOI Percent of AOI


134 21.4 100.0%


Rating Options—Wind Erodibility Index

Units of Measure: tons per acre per year




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.


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.


33

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Custom Soil Resource ReportMap—Hydrologic Soil Group

4403

760

4403

810

4403

860

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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


Feet0 35 70 140 210






A

A/D

B

B/D

C

C/D

D


Soil Rating LinesA

A/D

B

B/D

C

C/D

D


Soil Rating PointsA

A/D

B

B/D

C

C/D

D



TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads














35




36

Table—Hydrologic Soil Group



A 21.4 100.0%


Rating Options—Hydrologic Soil Group





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

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http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_054262






http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/home/?cid=nrcs142p2_053374

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/home/?cid=nrcs142p2_053374

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/landuse/rangepasture/?cid=stelprdb1043084

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/landuse/rangepasture/?cid=stelprdb1043084

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


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http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/scientists/?cid=nrcs142p2_054242

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/scientists/?cid=nrcs142p2_054242



http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf

http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf

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

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SHEET DRAWING TITLE

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%%UDRAWING INDEX

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1. FENCES, WALLS, SIGNS AND ACCESSORY STRUCTURES ARE SUBJECT TO SEPARATE REVIEWS AND FENCES, WALLS, SIGNS AND ACCESSORY STRUCTURES ARE SUBJECT TO SEPARATE REVIEWS AND PERMITS. 2. ANGLES NOT SHOWN ARE EITHER 90 DEGREES OR A SUPPLEMENT OF THE ANGLE INDICATED. ANGLES NOT SHOWN ARE EITHER 90 DEGREES OR A SUPPLEMENT OF THE ANGLE INDICATED. 3. PRIVATE ROADWAYS WILL BE POSTED WITH "FIRE LANE" SIGNS AS REQUIRED BY THE DENVER FIRE PRIVATE ROADWAYS WILL BE POSTED WITH "FIRE LANE" SIGNS AS REQUIRED BY THE DENVER FIRE DEPARTMENT. 4. PARKING SPACES FOR PERSONS WITH DISABILITIES WILL BE CLEARLY DELINEATED WITH UPRIGHT SIGNS. PARKING SPACES FOR PERSONS WITH DISABILITIES WILL BE CLEARLY DELINEATED WITH UPRIGHT SIGNS. 5. APPROVAL FOR THIS PLAN DOES NOT CONSTITUTE OR IMPLY COMPLIANCE WITH ADA REQUIREMENTS. APPROVAL FOR THIS PLAN DOES NOT CONSTITUTE OR IMPLY COMPLIANCE WITH ADA REQUIREMENTS. 6. SITE SHALL BE LANDSCAPED PRIOR TO ISSUANCE OF A FINAL CERTIFICATE OF OCCUPANCY (CO) SITE SHALL BE LANDSCAPED PRIOR TO ISSUANCE OF A FINAL CERTIFICATE OF OCCUPANCY (CO) DURING THE GROWING SEASON OF APRIL 1ST TO OCTOBER 1ST, AT ALL OTHER TIMES THE INDIVIDUAL SITES SHALL BE LANDSCAPED WITHIN 45 (FORTY-FIVE) DAYS OF THE START OF THE FOLLOWING GROWING SEASON. 7. AN ACCESS EASEMENT FOR EMERGENCY SERVICES IS HEREBY GRANTED ON AND ACROSS ALL AREAS AN ACCESS EASEMENT FOR EMERGENCY SERVICES IS HEREBY GRANTED ON AND ACROSS ALL AREAS FOR POLICE, FIRE, MEDICAL AND OTHER EMERGENCY VEHICLES AND FOR THE PROVISION OF EMERGENCY SERVICES. 8. ALL LANDSCAPE AREAS SHALL BE IRRIGATED WITH UNDERGROUND AUTOMATIC IRRIGATION SYSTEM. ALL LANDSCAPE AREAS SHALL BE IRRIGATED WITH UNDERGROUND AUTOMATIC IRRIGATION SYSTEM. TREES, SHRUBS, AND DECORATIVE GRASSES WILL BE IRRIGATED BY A SEPARATE ZONE FROM SOD/GRASS; THIS INCLUDES TREES PLANTED IN SOD/GRASS AREA. THE IRRIGATION SYSTEM IS TO HAVE A RAIN SENSOR SHUTOFF INSTALLED.

AutoCAD SHX Text

CIVIL CV-1 COVER SHEET SHEET 1 OF 7 COVER SHEET SHEET 1 OF 7 SHEET 1 OF 7 1 OF 7 OF 7 7 ER-1.0 INITIAL EROSION CONTROL SHEET 2 OF 7 INITIAL EROSION CONTROL SHEET 2 OF 7 SHEET 2 OF 7 2 OF 7 OF 7 7 ER-1.1 INTERIM EROSION CONTROL SHEET 3 OF 7 INTERIM EROSION CONTROL SHEET 3 OF 7 SHEET 3 OF 7 3 OF 7 OF 7 7 ER-1.2 FINAL EROSION CONTROL SHEET 4 OF 7 FINAL EROSION CONTROL SHEET 4 OF 7 SHEET 4 OF 7 4 OF 7 OF 7 7 ER-2.0 EROSION CONTROL DETAILS SHEET 5 OF 7 EROSION CONTROL DETAILS SHEET 5 OF 7 SHEET 5 OF 7 5 OF 7 OF 7 7 ER-2.1 EROSION CONTROL DETAILS SHEET 6 OF 7 EROSION CONTROL DETAILS SHEET 6 OF 7 SHEET 6 OF 7 6 OF 7 OF 7 7 ER-2.2 EROSION CONTROL DETAILS SHEET 7 OF 7EROSION CONTROL DETAILS SHEET 7 OF 7SHEET 7 OF 77 OF 7OF 77

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GENERAL NOTES

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PROJECT CONTACTS:

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CIVIL ENGINEER RIDGETOP ENGINEERING AND CONSULTING, LLC 5255 RONALD REAGAN BLVD, SUITE 210 JOHNSTOWN, CO 80534 (303) 322-6480 CONTACT: MIKE BEACH, P.E.

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SURVEYOR AZTEC CONSULTANTS, INC. 300 E MINERAL AVE, SUITE 1 LITTLETON, CO 80122 (303) 713-1898 CONTACT: SHAUN LEE

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DEVELOPER/APPLICANT WALL DEVELOPMENT GROUP 1121 GRANT STREET, SUITE 2-A DENVER, CO 80203 (720) 524-4392 CONTACT: MIKE WALL

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BASIS OF BEARING

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THE SOUTH LINE OF THE SOUTHEAST QUARTER OF SECTION 16, TOWNSHIP 3 SOUTH, RANGE 66 WEST OF THE 6TH PRINCIPAL MERIDIAN, BEING MONUMENTED AT THE SOUTHEAST CORNER BY A NO. 6 REBAR WITH A 3-1/4" ALUMINUM CAP STAMPED "PLS 36053 2005" IN RANGE BOX AND AT THE SOUTH QUARTER CORNER BY A NO. 6 REBAR WITH A 3-1/4" ALUMINUM CAP STAMPED "PLS 36053 2005" IN RANGE BOX, ASSUMED TO BEAR SOUTH 89°52'23" WEST.

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1:1000

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VICINITY MAP

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LEGAL DESCRIPTION

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PARCEL A:(WEST) LOT 1, BLOCK 2, TOWER 160 SUBDIVISION, COUNTY OF DENVER, STATE OF COLORADO THE TOTAL AREA OF PARCEL A CONTAINS 456,503 SQUARE FEET, OR 10.480 ACRES MORE OR LESS. PARCEL B:(EAST) LOT 1, BLOCK 3, TOWER 160 SUBDIVISION, COUNTY OF DENVER, STATE OF COLORADO THE TOTAL AREA OF PARCEL B CONTAINS 365,999 SQUARE FEET, OR 8.402 ACRES MORE OR LESS.

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LANDSCAPE PLANSCAPES 980 NORWAY MAPLE DR LOVELAND, CO 80538 (970) 988-5301 CONTACT: ROBERT MOLLOY

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STORMWATER MANAGEMENT PLAN SECTION 16, TOWNSHIP 3 SOUTH, RANGE 66 WEST, 6TH P.M. CITY OF DENVER, COUNTY OF DENVER, STATE OF COLORADO LOCATED AT: 18251 GREEN VALLEY RANCH BLVD AND 4891 TOWER ROAD

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GATEWAY CROSSING

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E 49TH AVE.

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E 51ST AVE.

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SITE LOCATION

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GREEN VALLEY RANCH BLVD

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E 49TH AVE.

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TOWER RD.

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TOWER RD.

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E 47TH AVE.

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E 45TH AVE.

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WALDEN ST.

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PENA BLVD.

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1. THIS PROJECT IS LOCATED WITHIN THE GATEWAY REGIONAL METRO DISTRICT (THE “DISTRICT”). THIS THIS PROJECT IS LOCATED WITHIN THE GATEWAY REGIONAL METRO DISTRICT (THE “DISTRICT”). THIS DISTRICT”). THIS ). THIS DISTRICT MAY INCLUDE, BUT IS NOT LIMITED TO, STREETSCAPE AMENITIES SUCH AS TREES, TREE GRATES, IRRIGATION, PEDESTRIAN LIGHTS, ELECTRIC POWER SUPPLY, SIDEWALK, PAVERS, PLANTERS, WALLS, BENCHES AND TRASH RECEPTACLES. ANY DAMAGE TO THE STREETSCAPE AMENITIES OF THIS DISTRICT, INCLUDING UTILITIES, AS A RESULT OF THE CONSTRUCTION OF THIS PROJECT SHALL BE REPAIRED AND/OR REPLACED BY THE CONTRACTOR AT HIS COST 2. DISTRICT UTILITIES MAY EXIST IN THIS PROPERTY'S STREET FRONTAGE. THE UTILITY NOTIFICATION DISTRICT UTILITIES MAY EXIST IN THIS PROPERTY'S STREET FRONTAGE. THE UTILITY NOTIFICATION CENTER OF COLORADO OR PRIVATE UTILITY LOCATE COMPANIES MAY BE UNABLE TO IDENTIFY OR LOCATE DISTRICT UTILITIES. THESE UTILITIES ARE TYPICALLY IRRIGATION OR ELECTRIC LINES. 3. SINCE THIS PROJECT IS IN THE GATEWAY NEIGHBORHOOD, THE GATEWAY IMPACT FEE WILL NEED TO SINCE THIS PROJECT IS IN THE GATEWAY NEIGHBORHOOD, THE GATEWAY IMPACT FEE WILL NEED TO BE PAID PRIOR TO THE ISSUANCE OF BUILDING PERMITS FOR THIS PROJECT. FOR INFORMATION ON THE IMPACT FEE AMOUNT, PLEASE CONTACT BRENDAN KELLY AT 720-913-4503 OR [email protected]

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REQUIRED NOTES

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I HEREBY CERTIFY THAT THIS CONSTRUCTION ACTIVITIES STORMWATER MANAGEMENT PLAN FOR GATEWAY CROSSING, GATEWAY CROSSING, , PROJECT # EC-XXX-XXX 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# ___________________ (NAME) DATE __________ PROJECT DESIGN ENGINEER

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ENGINEER'S CERTIFICATION:

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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. ______________________________ (NAME) DATE __________ OWNER OR AUTHORIZED AGENT REPRESENTING OWNER

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OWNER'S CERTIFICATION:

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1. THE PERMITTEE AND/OR CONTRACTOR SHALL REMOVE ALL SEDIMENT, MUD, CONSTRUCTION DEBRIS, OR OTHER POTENTIAL POLLUTANTS THAT MAY HAVE BEEN DISCHARGED TO OR, ACCUMULATE THE PERMITTEE AND/OR CONTRACTOR SHALL REMOVE ALL SEDIMENT, MUD, CONSTRUCTION DEBRIS, OR OTHER POTENTIAL POLLUTANTS THAT MAY HAVE BEEN DISCHARGED TO OR, ACCUMULATE IN, THE FLOWLINES, STORM DRAINAGE APPURTENANCES, AND PUBLIC RIGHTS OF WAYS OF THE CITY AND COUNTY OF DENVER AS A RESULT OF CONSTRUCTION ACTIVITIES ASSOCIATED WITH THIS SITE DEVELOPMENT OR CONSTRUCTION PROJECT. SAID REMOVAL SHALL BE CONDUCTED IN A TIMELY MANNER. 2. THE CONTRACTOR SHALL PREVENT SEDIMENT, DEBRIS, AND ALL OTHER POLLUTANTS FROM ENTERING THE STORM SEWER SYSTEM DURING ALL DEMOLITION, EXCAVATION, TRENCHING, BORING, THE CONTRACTOR SHALL PREVENT SEDIMENT, DEBRIS, AND ALL OTHER POLLUTANTS FROM ENTERING THE STORM SEWER SYSTEM DURING ALL DEMOLITION, EXCAVATION, TRENCHING, BORING, GRADING, OR OTHER CONSTRUCTION OPERATIONS THAT ARE PART OF THIS PROJECT. THE CONTRACTOR SHALL BE HELD RESPONSIBLE FOR REMEDIATION OF ANY ADVERSE IMPACTS TO THE MUNICIPAL SEPARATE STORM SEWER SYSTEM, RECEIVING WATERS, WATERWAYS, WETLANDS, AND OR OTHER PUBLIC OR PRIVATE PROPERTIES, RESULTING FROM WORK DONE AS PART OF THIS PROJECT. 3. SOIL STABILIZATION MEASURES SHALL BE IMPLEMENTED WITHIN FOURTEEN (14) DAYS FOLLOWING COMPLETION OF GRADING ACTIVITIES. STABILIZATION OF DISTURBED AREAS ADJACENT TO SOIL STABILIZATION MEASURES SHALL BE IMPLEMENTED WITHIN FOURTEEN (14) DAYS FOLLOWING COMPLETION OF GRADING ACTIVITIES. STABILIZATION OF DISTURBED AREAS ADJACENT TO RECEIVING WATERS OR WITH SLOPES 3 TO 1 OR GREATER SHALL BE COMPLETED WITHIN SEVEN (7) DAYS FOLLOWING COMPLETION OF GRADING ACTIVITIES. NOTE: FEDERAL AND STATE REGULATIONS MAY SOON REQUIRE STABILIZATION WITHIN SEVEN (7) DAYS OF COMPLETION OF GRADING ACTIVITIES. IN SUCH CASES, THE SHORTER TIMEFRAME SHALL APPLY TO PROJECTS WITHIN DENVER AS WELL. 4. THE DEVELOPER, GENERAL CONTRACTOR, GRADING CONTRACTOR AND/OR THEIR AUTHORIZED AGENTS SHALL INSURE THAT ALL LOADS OF CUT AND FILL MATERIAL IMPORTED TO OR EXPORTED THE DEVELOPER, GENERAL CONTRACTOR, GRADING CONTRACTOR AND/OR THEIR AUTHORIZED AGENTS SHALL INSURE THAT ALL LOADS OF CUT AND FILL MATERIAL IMPORTED TO OR EXPORTED FROM THIS SITE SHALL BE PROPERLY COVERED TO PREVENT LOSS OF THE MATERIAL DURING TRANSPORT ON PUBLIC RIGHTS OF WAYS (SEC.49-552; REVISED MUNICIPAL CODE). 5. THE USE OF REBAR TO ANCHOR BEST MANAGEMENT PRACTICES IS PROHIBITED. STEEL FENCE POSTS MAY BE USED ON A CASE BY CASE BASIS AND REQUIRES APPROVAL FROM THE CITY AND THE USE OF REBAR TO ANCHOR BEST MANAGEMENT PRACTICES IS PROHIBITED. STEEL FENCE POSTS MAY BE USED ON A CASE BY CASE BASIS AND REQUIRES APPROVAL FROM THE CITY AND PROHIBITED. STEEL FENCE POSTS MAY BE USED ON A CASE BY CASE BASIS AND REQUIRES APPROVAL FROM THE CITY AND . STEEL FENCE POSTS MAY BE USED ON A CASE BY CASE BASIS AND REQUIRES APPROVAL FROM THE CITY AND COUNTY OF DENVER SWMP REVIEWER OR THE STORMWATER ENFORCEMENT INVESTIGATOR PRIOR TO INSTALLATION. 6. SOILS THAT WILL BE STOCKPILED FOR MORE THAN THIRTY (30) DAYS SHALL BE PROTECTED FROM WIND AND WATER EROSION WITHIN FOURTEEN (14) DAYS OF STOCKPILE CONSTRUCTION. SOILS THAT WILL BE STOCKPILED FOR MORE THAN THIRTY (30) DAYS SHALL BE PROTECTED FROM WIND AND WATER EROSION WITHIN FOURTEEN (14) DAYS OF STOCKPILE CONSTRUCTION. STABILIZATION OF STOCKPILES LOCATED WITHIN 100 FEET OF RECEIVING WATERS, OR WITH SLOPE 3 TO 1 OR GREATER SHALL BE COMPLETED WITHIN SEVEN (7) DAYS FOLLOWING STOCKPILE CONSTRUCTION. STABILIZATION AND PROTECTION OF THE STOCKPILE MAY BE ACCOMPLISHED BY ANY OF THE FOLOWING: MULCHING, TEMPORARY/PERMANENT REVEGETATION OPERATIONS, CHEMICAL SOIL STABILIZER APPLICATION (REQUIRES DENVER PUBLIC WORKS APPROVAL), OR EROSION CONTROL MATTING/GEOTEXTILES. IF STOCKPILES ARE LOCATED WITHIN 100 FEET OF RECEIVING WATERS, A DRAINAGE WAY OR THE SITE PERIMETER, ADDITIONAL SEDIMENT CONTROLS SUCH SHALL BE REQUIRED. 7. APPROVED EROSION AND SEDIMENT CONTROL 'BEST MANAGEMENT PRACTICES' SHALL BE MAINTAINED AND KEPT IN GOOD REPAIR FOR THE DURATION OF THIS PROJECT. AT A MINIMUM,THE APPROVED EROSION AND SEDIMENT CONTROL 'BEST MANAGEMENT PRACTICES' SHALL BE MAINTAINED AND KEPT IN GOOD REPAIR FOR THE DURATION OF THIS PROJECT. AT A MINIMUM,THE PERMITTEE OR CONTRACTOR SHALL PRODUCE AND RETAIN WEEKLY WRITTEN INSPECTION RECORDS FOR ALL BMPS AND AFTER SIGNIFICANT PRECIPITATION EVENTS. ALL NECESSARY MAINTENANCE AND REPAIR SHALL BE COMPLETED IMMEDIATELY. ADDITIONALLY, STREET SWEEPING IS TO BE COMPLETED BY THE CLOSE OF THE BUSINESS DAY OR (AND) ON AN AS NEEDED BASIS THROUGHOUT THE DAY. 8. WATER USED IN THE CLEANING OF CEMENT TRUCK DELIVERY CHUTES SHALL BE DISCHARGED INTO A PREDEFINED, CONCRETE WASHOUT AREA ON THE JOB SITE. BERMED CONTAINMENT OR WATER USED IN THE CLEANING OF CEMENT TRUCK DELIVERY CHUTES SHALL BE DISCHARGED INTO A PREDEFINED, CONCRETE WASHOUT AREA ON THE JOB SITE. BERMED CONTAINMENT OR COMMERCIALLY AVAILABLE CONCRETE WASHOUT DEVICES THAT FULLY CONTAIN ALL WASH WATER ARE ACCEPTABLE. WASH WATER DISCHARGED INTO THE CONTAINMENT AREA OR DEVICE SHALL BE ALLOWED TO INFILTRATE, EVAPORATE, AND OR BE DISPOSED OF IN ACCORDANCE WITH ALL APPLICABLE REGULATIONS. DRIED CEMENT WASTE IS TO BE REMOVED FROM THE CONTAINMENT AREA AND PROPERLY DISPOSED. SHOULD THE USE OF A PREDEFINED BERMED CONTAINMENT AREA OR APPROVED WASHOUT DEVICE BE TECHNICALLY INFEASIBLE DUE TO THE PROJECT SIZE, OR LACK OF AN AREA WITH A SUITABLE GROUND SURFACE FOR ESTABLISHING CONTAINMENT, PROPER DISPOSAL OF CONCRETE WASHOUT AND WASH WATER AT THE JOB SITE SHALL CONFORM TO THE APPROVED TECHNIQUES AND PRACTICES IDENTIFIED IN THE COLORADO DEPARTMENT OF PUBLIC HEALTH & ENVIRONMENT'S TRAINING VIDEO ENTITLED "BUILDING FOR A CLEANER ENVIRONMENT, READY MIX WASHOUT TRAINING" AND ITS ACCOMPANYING MANUAL ENTITLED "READY MIX WASHOUT GUIDEBOOK, VEHICLE AND EQUIPMENT WASHOUT AT CONSTRUCTION SITES. THE DIRECT OR INDIRECT DISCHARGE OF WATER CONTAINING WASTE CEMENT TO THE STORM SYSTEM IS PROHIBITED. (SEC. 56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER) PROHIBITED. (SEC. 56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER) . (SEC. 56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER) 9. THE CONTRACTOR SHALL PROTECT ALL STORM SEWER FACILITIES ADJACENT TO ANY LOCATION WHERE PAVEMENT CUTTING OPERATIONS INVOLVING WHEEL CUTTING, SAW CUTTING, OR ABRASIVE THE CONTRACTOR SHALL PROTECT ALL STORM SEWER FACILITIES ADJACENT TO ANY LOCATION WHERE PAVEMENT CUTTING OPERATIONS INVOLVING WHEEL CUTTING, SAW CUTTING, OR ABRASIVE WATER JET CUTTING ARE TO TAKE PLACE. THE CONTRACTOR SHALL REMOVE AND PROPERLY DISPOSE OF ALL WASTE PRODUCTS GENERATED BY SAID CUTTING OPERATIONS ON A DAILY BASIS OR AS NEEDED THROUGHOUT THE WORK DAY. THE DISCHARGE OF ANY WATER CONTAMINATED BY WASTE PRODUCTS FROM CUTTING OPERATIONS TO THE STORM SEWER SYSTEM IS PROHIBITED. (SEC. PROHIBITED. (SEC. . (SEC. 56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER) 10. PAVED AND IMPERVIOUS SURFACES WHICH ARE ADJACENT TO CONSTRUCTION SITES MUST BE SWEPT ON A DAILY BASIS AND AS NEEDED DURING THE DAY WHEN SEDIMENT AND OTHER PAVED AND IMPERVIOUS SURFACES WHICH ARE ADJACENT TO CONSTRUCTION SITES MUST BE SWEPT ON A DAILY BASIS AND AS NEEDED DURING THE DAY WHEN SEDIMENT AND OTHER MATERIALS ARE TRACKED OR DISCHARGED ONTO THEM. EITHER SWEEPING BY HAND OR USE OF STREET SWEEPERS IS ACCEPTABLE. STREET SWEEPERS USING WATER WHILE SWEEPING IS PREFERRED IN ORDER TO MINIMIZE DUST. FLUSHING OFF PAVED SURFACES WITH WATER IS PROHIBITED. (56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER)PROHIBITED. (56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER). (56-102A, C; REVISED MUNICIPAL CODE, CITY AND COUNTY OF DENVER)

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1.ALL EROSION AND SEDIMENT CONTROL PRACTICES AND OTHER PROTECTIVE MEASURES IDENTIFIED IN ALL EROSION AND SEDIMENT CONTROL PRACTICES AND OTHER PROTECTIVE MEASURES IDENTIFIED IN THE SWMP MUST BE MAINTAINED IN EFFECTIVE OPERATING CONDITION. PROPER SELECTION AND INSTALLATION OF BMPS AND IMPLEMENTATION OF COMPREHENSIVE INSPECTION AND MAINTENANCE PROCEDURES, IN ACCORDANCE WITH THE SWMP, SHOULD BE ADEQUATE TO MEE THIS CONDITION. BMPS THAT ARE NOT ADEQUATELY MAINTAINED IN ACCORDANCE WITH GOOD ENGINEERING, HYDROLOGIC AND POLLUTION CONTROL PRACTICES, INCLUDING REMOVAL OF COLLECTED SEDIMENT OUTSIDE THE ACCEPTABLE TOLERANCES OF THE BMPS, ARE CONSIDERED TO BE NO LONGER OPERATING EFFECTIVELY AND MUST BE ADDRESSED.

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BMP MAINTENANCE NOTE

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CUT VOLUME (CY)

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FILL VOLUME (CY)

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NET VOLUME (CY)

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49TH AVE

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PROJECT TITLE

REVISIONS

SHEET TITLE

SHEET INFORMATION

SEAL

DATE

PREPARED FOR



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


R

CITY AND

COUNTY OF

DENVER

PUBLIC WORKS

DEVELOPMENT


PM PROJECT NO.

2018PM0000117

EVC-WDG

TOWER, LLC

3501 SW FAIRLAWN RD

SUITE 200


COMMENTS 12/13/18

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16" DUCTILE IRON WATER LINE COULD NOT BE ELECTRONICALLY LOCATED IN THIS AREA

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UNABLE TO LOCATE UNDEGROUND TRAFFIC UTILITIES IN THIS AREA

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UNABLE TO LOCATE TRAFFIC SIGNALS IN THIS AREA

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STOCKPILE STORAGE MOVE AS NECESSARY TO COMPLETE CONSTRUCTION SILT FENCE MUST BE 3 FT AWAY FROM STOCKPILE (SEE DETAILS)

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SEE NOTE, THIS SHEET

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CONSTRUCTION PARKING: MOVE AS NECESSARY TO COMPLETE CONSTRUCTION, KEEP ON SITE

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AREA: 20,058 SF VOLUME: 35,511 CF ORIFICE DIAMETER SIZE: IN38 IN

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AREA: 20,058 SF VOLUME: 35,511 CF ORIFICE DIAMETER SIZE: IN38 IN

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LIMITS OF DISTURBANCE

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NOTE TO CONTRACTOR: WHILE THE LIMITS OF DISTURBANCE SHOWN INCLUDES ALL OF THE SITE, THE CONTRACTOR SHALL LIMIT DISTURBANCE OF NATURAL VEGETATION AS MINIMALLY AS NECESSARY TO COMPLETE THE PROPOSED WORK. TEMPORARY/PERMANENT SEEDING SHALL ONLY APPLY TO THOSE AREAS DISTURBED. ALSO, THE CONTRACTOR WILL BE REQUIRED TO SWEEP OR VACUUM ANY VISIBLE SEDIMENT THAT IS TRACKED ONTO CITY STREETS.

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PROPERTY LINE

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TOTAL DISTURBED AREA

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SITE AREA

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ON-SITE DISTURBED AREA

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OFF-SITE DISTURBED AREA

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CONTRACTOR SHALL LEAVE EXPOSED DISTURBED SOILS IN A SURFACED ROUGHENED STATE UNTIL CONSTRUCTION ACTIVITIES ARE COMPLETE. IF NO CONSTRUCTION IS TO TAKE PLACE WITHIN 30 DAYS WHERE SOILS ARE DISTURBED, TEMPORARY SEED MUST BE APPLIED, SEE SEEDING NOTE, THIS SHEET.

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ACC

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Of

PROJECT TITLE

REVISIONS

SHEET TITLE

SHEET INFORMATION

SEAL

DATE

PREPARED FOR



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


R

CITY AND

COUNTY OF

DENVER

PUBLIC WORKS

DEVELOPMENT


PM PROJECT NO.

2018PM0000117

EVC-WDG

TOWER, LLC

3501 SW FAIRLAWN RD

SUITE 200


COMMENTS 12/13/18

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STOCKPILE STORAGE MOVE AS NECESSARY TO COMPLETE CONSTRUCTION SILT FENCE MUST BE 3 FT AWAY FROM STOCKPILE (SEE DETAILS)

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CONSTRUCTION PARKING: MOVE AS NECESSARY TO COMPLETE CONSTRUCTION, KEEP ON SITE

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D

GREEN VALLEY

RANCH BLVD

49TH AVE

WA

LD

EN

ST

GREEN VALLEY

RANCH BLVD

49TH AVE

TO

WE

R R

D

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RANCH BLVD

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WA

LD

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RANCH BLVD

49TH AVE

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7Of

PROJECT TITLE

REVISIONS

SHEET TITLE

SHEET INFORMATION

SEAL

DATE

PREPARED FOR



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


R

CITY AND

COUNTY OF

DENVER

PUBLIC WORKS

DEVELOPMENT


PM PROJECT NO.

2018PM0000117

EVC-WDG

TOWER, LLC

3501 SW FAIRLAWN RD

SUITE 200


COMMENTS 12/13/18

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SITE AREA

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CONCRETE SIDEWALK

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HEAVY DUTY CONCRETE

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STANDARD DUTY ASPHALT

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TEMPORARY SEEDING - ALL BARE GROUND WHERE CONSTRUCTION ACTIVITY WILL NOT TAKE PLACE FOR LONGER THAN 30 DAYS MUST BE SEEDED WITHIN 14 DAYS WITH FAST-GERMINATING TEMPORARY SEED AND PROTECTED WITH MULCH, SOIL TACKIFIER, OR ROLLED SLOPE PROTECTION BLANKET. PERMANENT SEEDING - SEE PROJECT LANDSCAPE PLANS FOR REQUIREMENTS.

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TEMPORARY LANDSCAPING

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PERMANENT LANDSCAPING

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PROPERTY LINE

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21.17 AC%%p

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18.88 AC%%p%%

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18.88 AC%%p

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2.29 AC%%p%%

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



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


R

CITY AND

COUNTY OF

DENVER

PUBLIC WORKS

DEVELOPMENT


PM PROJECT NO.

2018PM0000117

EVC-WDG

TOWER, LLC

3501 SW FAIRLAWN RD

SUITE 200


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



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


R

CITY AND

COUNTY OF

DENVER

PUBLIC WORKS

DEVELOPMENT


PM PROJECT NO.

2018PM0000117

EVC-WDG

TOWER, LLC

3501 SW FAIRLAWN RD

SUITE 200


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



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


R

CITY AND

COUNTY OF

DENVER

PUBLIC WORKS

DEVELOPMENT


PM PROJECT NO.

2018PM0000117

EVC-WDG

TOWER, LLC

3501 SW FAIRLAWN RD

SUITE 200


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

Construction Stormwater Management Plan (SWMP)

Documents