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HomeMy WebLinkAboutREDTAIL PONDS PERMANENT SUPPORTIVE HOUSING (AFFORDABLE HOUSING) - FDP - FDP130048 - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORT (3)EROSION CONTROL REPORT FOR PERMANENT SUPPORTIVE HOUSING DEVELOPMENT AT FOSSIL BLVD/CONEJOS DRIVE RED TAIL SUBDIVISION FORT COLLINS, COLORADO FOR FORT COLLINS HOUSING AUTHORITY 1715 W. MOUNTAIN AVENUE FORT COLLINS, COLORADO 80521 NOVEMBER 21, 2013 FCHA Permanent Supportive Housing Development - Erosion Control Report Page 1 of 10 TABLE OF CONTENTS SECTION 1 – GENERAL LOCATION AND DESCRIPTION ................................................................. 2 SITE LOCATION .................................................................................................................... 2 DESCRIPTION OF PROPERTY .................................................................................................. 2 SECTION 2 – DRAINAGE BASINS AND HISTORIC RUNOFF .............................................................. 3 HISTORIC BASINS ................................................................................................................. 3 PROPOSED DEVELOPED BASINS ............................................................................................ 3 SECTION 3 – STORMWATER POLLUTION PREVENTION ................................................................... 5 TEMPORARY EROSION CONTROL .......................................................................................... 5 PERMANENT EROSION CONTROL........................................................................................... 5 STORMWATER MANAGEMENT CONTROLS .............................................................................. 5 SEQUENCE OF CONSTRUCTION ACTIVITIES .............................................................................. 8 SECTION 4 – CONCLUSIONS ..................................................................................................... 9 SECTION 5 – REFERENCES ....................................................................................................... 10 APPENDIX Appendix A – Drainage Maps 1. Figure 1- Existing Drainage Maps 2. Figure 2 - Developed Drainage Maps Appendix B – Utility and Landscape Plans 1. Erosion Control Plan (CE1.0) 2. SWMP and Erosion Control Details (CE1.1) 3. Grading and Drainage Plan (C1.0 to C1.3) 4. Storm Drain Plan (C1.4) 5. Drainage Details (CD1.0, CD1.2) 6. Landscape Plans LP01, LP02, LP11, and LP12 Appendix C – Erosion Control Security Calculations Appendix D – Soil data from NRCS FCHA Permanent Supportive Housing Development - Erosion Control Report Page 2 of 10 SECTION 1 – GENERAL LOCATION AND DESCRIPTION SITE LOCATION The Fort Collins Housing Authority Permanent Supportive Housing is located in the Red Tail Subdivision at the intersection of Fossil Boulevard and Conejos Drive in the City of Fort Collins, Colorado. DESCRIPTION OF PROPERTY The site is owned by Fort Collins Housing Authority, and is made up of three separate Tracts. Tract AA open space with 0.120 acres, Lot 1 with 2.820 acres and Lot 2 with 0.145 acres, for a combined total of 3.085 acres. The site generally slopes from northwest to southeast with slopes from 2% to 25%. The soils within the site consist of Kim loam and Nunn clay loam which have been classified based on the Natural Resources Conservation Services (NRCS). Majority of the site is classified as Kim loams having a Type B hydrologic soil group with a moderate inflation rate. The remaining site is Tassel sandy loam with a Type D hydrologic soil group. For the purposes of this site analysis the entire site was assumed to have a Type C hydrologic soil group. See Appendix D for soil data. The existing percent vegetative density of the property is approximately 50% which includes native grasses around the perimeter and stockpiling of soil and riprap stone. The stockpiles of soil have small areas of vegetation being established. The rainfall erodibility ranges from K=0.32 for type B soil and to K=0.20 for type C soil and will cause rilling and gulling over longer distances and steeper slopes. Terracing and perimeter control will help minimize the extent of gulling. There are no irrigation canals passing through the site. A Geotechnical Engineering Study was performed for the site and measured ground water at depths of 14' and 20.5' below existing grade. The property is not located within the 100 year floodplain as shown on the City of Fort Collins Flood Map. FCHA Permanent Supportive Housing Development - Erosion Control Report Page 3 of 10 SECTION 2 – DRAINAGE BASINS AND HISTORIC RUNOFF HISTORIC BASINS The site has been divided into four separate basins. Sub-Basins H1 and H2, shown on the attached Drainage Figure 1 in Appendix A, sheet flow to the north and northwest. Basin H1 represents drainage that sheet flows to the existing Conejos Road that is conveyed to the existing Pond B. Basin H2 sheet flows directly southwest off the site to the existing Pond B. Basin H3 sheet flow along steep slopes ( > 7%) to the east and towards South College Avenue. Basin H4 sheet flow along steep slopes ( > 7%) to the east and towards Frontage Road. All four basins eventually convey stormwater to Fossil Creek south of the site. PROPOSED DEVELOPED BASINS FCHA proposes to construct a building with associated parking, driveway and roadway improvements, walks, retaining walls and other features throughout the site. The overall imperviousness of the site will increase from 2.7% to 33.5%. FCHA proposes to access the site from the same existing location in Conejos Road and Fossil Boulevard. The majority of the site has been graded to drain towards the south to the proposed onsite detention/water quality pond. The remaining to the east will continue to drain to South College Avenue and Frontage Road. See Figure 2 in Appendix A for the proposed drainage Sub- Basins and grading plan. The site has been divided into six separate basins. Sub-Basin OS-1 to will continue to drain west undetained to Conejos Road as historical, eventually being conveyed to the existing Pond B. This basin consists of a paved drive entrance, sidewalks and lawn area. The overall runoff from this basin will decrease by 0.34cfs in comparison to existing basin H-1 Sub-Basin OS-2 will continue to drain southwest as historical, eventually being conveyed offsite undetained to the existing Pond B. This basin will remain mostly undisturbed and replanted with lawn. The overall runoff from this basin will decrease by 0.24cfs in comparison to existing basin H-2. Sub-Basin A1 consists of the parking lot, sidewalks and lawn area where the majority of the stromwater will sheet flow to three separate permeable paver systems and be conveyed through the pavers, into the stone drainage base course and into an underdrain. The permeable pavers will provided water quality and provide some detention volume required for the site. The underdrain with in the permeable pavers will be piped to a central inlet within the middle of the parking lot that conveys stormwater to the detention/water quality pond. Additionally, a small section of roof area at the entrance will be piped to the underdrain within the parking median. In the event of the permeable paver systems becoming clogged, stormwater will be conveyed to a curb cut that will drain to the center parking median with an underdrain and inlet. The inlet FCHA Permanent Supportive Housing Development - Erosion Control Report Page 4 of 10 within the media will be set slightly above the existing grade to promote infiltration into the surrounding soil and underdrain system. If the inlet becomes clogged, stormwater will pond within the parking area and eventually spill west to the proposed detention/water quality pond. Sub-basin A2 consists of the building roof area, patio, lawn and the detention/water quality pond. The stromwater from the roof will be piped and conveyed to a bio-swale along the south properly line. The bio-swale will have a perforated underdrain pipe encased in washed stone to help promote infiltration and to provide water quality. The patio and lawn area will sheet flow to an inlet located near the bocce ball court that will also convey stormwater to the bio-swale. The bio- swale will convey stormwater from basin A-2 to the detention/water quality pond. Sub-basin A3 consists of sidewalks and steep lawn/landscaping with retaining walls. Stormwater will sheet flow undetained to the southeast corner of the site as historically and eventually be conveyed offsite to frontage road. The overall runoff from this basin will decrease by 3.08cfs in comparison to existing basin H-4. Sub-basin A4 consists of sidewalks and steep lawn/landscaping with retaining walls. Stormwater will sheet flow undetained to the eastern properly line as historically and eventually be conveyed offsite to South College Avenue. FCHA Permanent Supportive Housing Development - Erosion Control Report Page 5 of 10 SECTION 3 – STORMWATER POLLUTION PREVENTION TEMPORARY EROSION CONTROL A temporary erosion control plan is to be implemented for the site during construction. Temporary erosion control measures include, but not limited to, slope and swale protection provided by the use of erosion control wattles/sediment control logs, inlet protection, etc. All temporary erosion control measures are to be removed after they are deemed unnecessary. PERMANENT EROSION CONTROL Permanent erosion control measures include, but not limited to, the constructed detention pond, riprap pads placed for culvert outlet protection, seeding and mulch placed to enable and established vegetative growth, etc. Long-term maintenance of these erosion control measures shall be the responsibility of the owner of the property. A general erosion control plan has been provided in Appendix B. STORMWATER MANAGEMENT CONTROLS i. The Stormwater Management Plan (SWMP) administrator will be Dave Eddy with Fransen Pittman GC., 23 Inverness Way East, Suite 250 Englewood, CO 80112. 303-783-3900, deddy@fransenpittman.com. ii. According to the CDPHE Stormwater Fact Sheet – Construction, construction activities produce many different kinds of pollutants which may cause stormwater contamination problems. The main pollutant of concern at construction sites is sediment. Grading activities remove grass, rocks, pavement, and other protective ground covers, resulting in the exposure of underlying soil to the elements. The soil is then easily picked up by wind and/or washed away by rain or snowmelt. In addition, construction activities often require the use of toxic or hazardous materials such as fuel, fertilizers, pesticides, and herbicides, and building materials such as asphalt, sealants, and concrete, which may also pollute stormwater. These materials can be harmful to humans, plants, and aquatic life. There are no known potential pollution sources. However, this condition should be confirmed by the owner/operator or SWMP administrator. Other pollution sources that could be present include: runoff from vehicle washing, vehicle maintenance and/or fueling, There are no known existing non-stormwater components of discharge (i.e., springs, landscape irrigation return flow, and etc.), or any anticipated during construction. FCHA Permanent Supportive Housing Development - Erosion Control Report Page 6 of 10 1. All Disturbed and Stored Soil: The total disturbed area will be approximately 2.93 acres including grading for the parking lot and building. Soil stockpiles should be kept below the locally mandated maximum height and surrounded with silt fencing. If the storage of these soils is going to be for an extended period of time, then consider temporarily seeding the soil to minimize soil loss to wind and water erosion. 2. Vehicle Tracking of Sediments: The off-site tracking of mud and debris is easily controlled by installing Vehicle Tracking Control (VTC, Refer to Appendix D for additional details). This is a stabilized stone pad located at points of ingress and egress on a construction site. It is designed to reduce the amount of mud transported onto the public roads by construction traffic. If the site is extraordinarily muddy, then consider designating an area to wash construction vehicles before they leave the site and enter the public right-of-way. A BMP such as this is a good way to avoid the costs associated with street cleaning or accidentally discharging large amounts of sediment into other storm drain systems. When in doubt, choose methods that prevent pollution rather than ones that force clean-up at the downstream end just before the stormwater enters the receiving waters. In other words, the most efficient construction site BMPs are those that prevent erosion from happening. Inlet Protection (IP): gravel inlet protection will be used on all existing and proposed curb inlets to prevent sediment and debris from entering the storm drain system. Street sweeping as necessary to remove sediment tracked on to pavement and adjacent streets. 3. Management of Contaminated Soils: There are no know contaminated soils on site. If contaminated soils are found, the contractor shall report to the SWMP administrator. 4. Loading and Unloading Operations: The existing entrance to the site is currently paved and loading/unloading activities will occur within the paved area of the site or a temporary gravel staging area will be provided. 5. Outdoor Storage Activities: Materials storage, waste disposal, and vehicle maintenance and fueling can occur within an enclosed and secure area. 6. Vehicle and Equipment Maintenance and Fueling: Materials should be stored and handled in covered areas to prevent contact with stormwater, and chemicals should be stored within berms or secondary containment devices to prevent leaks and spills from entering stormwater runoff. FCHA Permanent Supportive Housing Development - Erosion Control Report Page 7 of 10 Spill Management In general, spill prevention and response should include the following: a) Notification procedures to be used in the event of an accident. At the very least, the SWMP Administrator should be notified. Depending on the nature of the spill and the material involved, the Colorado Department of Health, downstream water users, or other agencies may also need to be notified. b) Instructions for clean-up procedures. c) Provisions for absorbents are to be made available for use in fuel areas, and for containers to be available for used absorbents. d) Procedures for properly washing out concrete trucks and other equipment in a manner and location so that the materials and wash water cannot discharge from the site, and never into a storm drain system or stream. 7. Significant Dust or Particulate Generating Processes: Disturbed areas not yet ready to be seeded, landscapes, paved, or otherwise stabilized shall be watered, or ripped as necessary to preclude visible dust emissions. 8. Routine Maintenance Activates Involving Fertilizer, Pesticides, Detergents, Fuels, Solvents, Oils, Etc: Materials should be stored and handled in covered areas to prevent contact with stormwater, and chemicals should be stored within berms or secondary containment devices to prevent leaks and spills from entering stormwater runoff. 9. On-site Waste management Practices (Waste Piles, Liquid Wastes, Dumpsters, etc): Materials storage, waste disposal, and vehicle maintenance and fueling can occur within an enclosed and secure area. The area can be enclosed with temporary fencing and accessed through a gate with a lock. 10. Concrete Truck/Equipment Washing: Concrete washout facilities will be provided onsite. Properly washing out concrete trucks and other equipment in a manner and location so that the materials and wash water cannot discharge from the site, and never into a storm drain system or stream. 11. Dedicated Asphalt and Concrete Batch Plants: N/A 12. Non-Industrial Waste Source Such as Workers Trash And Portable Toilets: Garbage cans shall be located at break areas and portable toilets shall be provided if onsite bathroom facilities cannot be used. 13. Other Areas or Procedures where Potential Spills can Occur: Records of spills, leaks, or overflows that result in the discharge of pollutants must be documented and maintained. Record all spills that are responded to, even if they do not result in a discharge of pollutants. Information that should be recorded for all FCHA Permanent Supportive Housing Development - Erosion Control Report Page 8 of 10 occurrences includes the time and date, weather conditions, reasons for the spill, etc. Some spills may need to be reported to immediately. Specifically, a release of any chemical, oil, petroleum product, sewage, etc., which may enter waters of the State of Colorado (which include surface water, ground water and dry gullies or storm sewers leading to surface water) must be reported. More guidance is available on the web at www.colorado.gov. The Division’s toll-free 24-hour number for environmental hazards and chemical spills and releases is 1-877-518-5608. SEQUENCE OF CONSTRUCTION ACTIVITIES Construction Start Date (This is the day you expect to begin disturbing soils, including grubbing, stockpiling, excavating, demolition, and grading activities): January 13th, 2014 (Revise to reflect the actual start date). Final Stabilization Date (this is when the site is finally stabilized. This means that all disturbed areas have been either built on, paved, or a uniform vegetative cover reaching over 70% of the initial vegetative density has been established.) Even if you are doing one part of the project, the estimated completion date must be for the overall project: TBD (Update when this information becomes available). Construction Sequencing: (Detailed construction sequencing to be determined by the contractor) 1. Installation of temporary erosion and sediment control measures. This includes all silt fence, inlet and outlet protection on all existing structures where land disturbing activities will occur. 2. Sequence of all land disturbing activity. The initial overlot grading for the parking lot and building will occur early on with the construction schedule. Additional land disturbance will occur around the building for utility installation and retaining wall construction. 3. Drainage facility construction. The proposed detention facility will be constructed during initial overlot grading to provide a sediment trap for the majority of the disturbed area of the site. The pond outlet will be protected with a temporary outlet structure protection BMP. 4. Sediment basins, temporary channel stabilization. The proposed detention pond will act as a sediment basin until final stabilization is complete. 5. Seeding All disturbed areas will be seeded upon completing of finish grading. Refer to the landscape plans for detailed planting and seeding schedule. See sheet LP01, LP02, LP11, and LP12 in Appendix B 6. Mulching Refer to landscape plans in Appendix B. 7. Required maintenance activities (e.g. expected frequency of sediment pond cleaning, after-storm checks of all BMPs, etc.). All temporary sediment control BMPs shall be inspected after each rain event to ensure proper protection and to determine if cleaning is necessary. Final cleaning of all storm pipe and sediment basins shall be provided upon final stabilization of site. FCHA Permanent Supportive Housing Development - Erosion Control Report Page 9 of 10 SECTION 4 – CONCLUSIONS The goal of the erosion control report was to describe appropriate controls and measures to improve water quality by reducing pollutants in stormwater discharges and ensure compliance with the requirements of the City of Fort Collins Erosion Control Standards. FCHA Permanent Supportive Housing Development - Erosion Control Report Page 10 of 10 SECTION 5 – REFERENCES 1. Urban Storm Drainage Criteria Manual (Volumes 1, 2, and 3), Urban Drainage and Flood Control District, June 2001, Revised April 2008. 2. Storm Drainage Criteria Manual and Construction Standards, City of Fort Collins Storm Water Utility, City of Fort Collins, Colorado, Updated January, 1997 with 2012 amendments. 3. “Hydrologic Group Rating for Larimer County Area, Colorado”, USDA-Natural Resources Conservation Service, National Cooperative Soil Survey. Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov. [12/6/2012] APPENDIX A – DRAINAGE MAPS 1. Figure 1- Existing Drainage Maps 2. Figure 2 - Developed Drainage Maps LOT 12 5,340 sq.ft. 5033 FOSSIL BLVD TRACT I 1,739 sq. ft. TRACT F 63,458 sq.ft. 1.457 acres CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY CE1.0 APPENDIX B – UTILITY AND LANDSCAPE PLANS 1. Erosion Control Plan (CE1.0) 2. SWMP and Erosion Control Details (CE1.1) 3. Grading and Drainage Plan (C1.0 to C1.3) 4. Storm Drain Plan (C1.4) 5. Drainage Details (CD1.0, CD1.2) 6. Landscape Plans LP01, LP02, LP11, and LP12 CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY CE1.1 LOT 12 5,340 sq.ft. 5033 FOSSIL BLVD TRACT F 63,458 sq.ft. 1.457 acres CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY C1.0 TRACT I 1,739 sq. ft. CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY C1.1 CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY C1.2 CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY C1.3 LOT 12 5,340 sq.ft. 5033 FOSSIL BLVD TRACT F 63,458 sq.ft. 1.457 acres CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY C1.4 CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY CD1.0 CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY CD1.1 C C A A B B SECTION C-C SECTION A-A SECTION B-B WELL SCREEN FLOW CONTROL PLATE 6" PLAN 1 GENERAL NOTES SECTION D-D WQ D A A OPP. CLR. ABBREVIATIONS @ # Wp Wo TYP. DIA. O.C. MAX. MIN. LEGEND INV. WQ ELEV. 6" Ls Ws Ws/2 Ws/2 1' Ls 3'-6" 6" 6" 6" VARIES VARIES 6" D 6" 4" Wp Wo Wo 1' Ws Wo 2'-6" 3" CLR. CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Date Date Date 678',2&203/(7,9$,1&&23<5,*+7‹ LP01 STUDIO COMPLETIVA JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY 1.5" 1" - A23 # #" # A 2" IRRIGATION PLAN - WEST & LEGEND AND NOTES STUDIO COMPLETIVA, INC. COPYRIGHT ©2 0 1 3 LP02 PROJECT NUMBER: DATE: DRAWN BY: CHECKED BY: APPROVED BY: SHEET TITLE: SHEET NUMBER: REVISION: STUDIO COMPLETIVA 3000 ZUNI STREET PHONE: 303-477-9156 DENVER, CO 80211 FAX: 303-477-9428 PO BOX 210 PHONE: 970-817-3812 FORT COLLINS, CO. 80522 JVA 25 OLD TOWN SQUARE SUITE 200 PHONE: 970-225-9099 FORT COLLINS, CO. 80524 FAX: 970-225-6923 KL&A 421 EAST 4TH STREET PHONE: 970-667-2426 LOVELAND, CO. 80537 FAX: 970-667-2493 MOUNTAIN AIRE 2165 S. KALAMATH STREET PHONE: 303-862-3990 DENVER, COLORADO 80223 FAX: 303-862-3991 wAyne's ELECTRIC 2101 WELD COUNTY ROAD 27 PHONE: 303-659-7481 FORT LUPTON, CO 80621 FAX: 303-654-0877 1715 WEST MOUNTAIN AVENUE PHONE: 970-416-2910 FORT COLLINS, CO. 80521 FAX: 970-221-0821 REDTAIL PONDS PSH 130201.01 11/21/13 FORT COLLINS HOUSING AUTHORITY LP02.dwg HARDSCAPE SITE PLAN - WEST Scale: 1''=20'-0'' IRRIGATION NOTES TREE PROTECTION 678',2&203/(7,9$,1&&23<5,*+7‹ LP11 STUDIO COMPLETIVA JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY LP11.dwg PLANTING PLAN - WEST Scale: 1''=20'-0'' LP12.dwg PLANTING PLAN - EAST Scale: 1''=20'-0'' 678',2&203/(7,9$,1&&23<5,*+7‹ LP12 STUDIO COMPLETIVA JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY APPENDIX C – EROSION CONTROL ESCROW 11/21/2013 Project: Disturbed Acres: 2.93 EROSION CONTROL BMPs Units Estimated Quantity Unit Price Total Price L.F. 1950 $2.50 $4,875.00 each 2 $150.00 $300.00 L.F. 50 $2.00 $100.00 each 1 $500.00 $500.00 each 3 $300.00 $900.00 each 1 $800.00 $800.00 LS 1 $1,000.00 $1,000.00 Sub-Total: $8,475.00 1.5 x Sub-Total: $12,712.50 Amount of security: $12,712.50 AC 1.5 $2,000.00 $3,000.00 Sub-Total: $3,000.00 1.5 x Sub-Total: $4,500.00 Amount to Re-seed: $4,500.00 Minimum escrow amount: $3,000.00 Erosion Control Escrow: $12,712.50 Erosion and Sediment Control Escrow/Security Calculation for The City of Fort Collins BMP Amount Silt Fence Inlet Protection Street Sweeping and Cleaning Reseeding Amount Sediment Control Log Miniumum Escrow Amount Fort Collins Housing Authority - Redtail Permanent Supportive Housing Seeding “The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid, whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three thousand dollars ($3,000) for commercial development” Rock Sock Vehicle Tracking Control Pad Final Escrow Amount (Maximum between BMP, Reseeding and Minimum Escrow) Outlet Protection 11/22/2013 9:47 AM V:\1980c Fort Collins Housing Authority\Reports\1980c Erosion Control Report\FCHA Erosion Control Escrow (2013-11-22).xls APPENDIX D – SOIL DATA FROM NRCS Hydrologic Soil Group—Larimer County Area, Colorado (Fort Collins Housing Authority) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/18/2013 Page 1 of 4 4484980 4485000 4485020 4485040 4485060 4485080 4485100 4485120 4485140 4484980 4485000 4485020 4485040 4485060 4485080 4485100 4485120 4485140 493220 493240 493260 493280 493300 493320 493340 493360 493380 493400 493420 493440 493460 493480 493220 493240 493260 493280 493300 493320 493340 493360 493380 493400 493420 493440 493460 493480 40° 31' 1'' N 105° 4' 48'' W 40° 31' 1'' N 105° 4' 37'' W 40° 30' 55'' N 105° 4' 48'' W 40° 30' 55'' N 105° 4' 37'' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 50 100 200 300 Feet 0 15 30 60 90 Meters Map Scale: 1:1,200 if printed on A landscape (11" x 8.5") sheet. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Larimer County Area, Colorado Hydrologic Soil Group Hydrologic Soil Group— Summary by Map Unit — Larimer County Area, Colorado (CO644) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 53 Kim loam, 1 to 3 percent slopes B 0.0 0.1% 54 Kim loam, 3 to 5 percent slopes B 2.9 40.7% 63 Longmont clay, 0 to 3 percent slopes C 0.2 3.3% 74 Nunn clay loam, 1 to 3 percent slopes C 1.3 18.2% 90 Renohill clay loam, 3 to 9 percent slopes C 0.3 3.8% 106 Tassel sandy loam, 3 to 25 percent slopes D 2.5 33.8% Totals for Area of Interest 7.2 100.0% Hydrologic Soil Group—Larimer County Area, Colorado Fort Collins Housing Authority Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/18/2013 Page 3 of 4 Description 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. 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. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—Larimer County Area, Colorado Fort Collins Housing Authority Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/18/2013 Page 4 of 4 K Factor, Whole Soil—Larimer County Area, Colorado (K Factor, Whole Soil - Larimer County Area, Colorado) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 11/25/2013 Page 1 of 3 4484970 4484990 4485010 4485030 4485050 4485070 4485090 4485110 4485130 4484970 4484990 4485010 4485030 4485050 4485070 4485090 4485110 4485130 493220 493240 493260 493280 493300 493320 493340 493360 493380 493400 493420 493440 493460 493480 493220 493240 493260 493280 493300 493320 493340 493360 493380 493400 493420 493440 493460 493480 40° 31' 1'' N 105° 4' 48'' W 40° 31' 1'' N 105° 4' 37'' W 40° 30' 55'' N 105° 4' 48'' W 40° 30' 55'' N 105° 4' 37'' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 50 100 200 300 Feet 0 15 30 60 90 Meters Map Scale: 1:1,240 if printed on A landscape (11" x 8.5") sheet. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons .02 .05 .10 .15 .17 .20 .24 .28 .32 .37 .43 .49 .55 .64 Not rated or not available Soil Rating Lines .02 .05 .10 .15 .17 .20 .24 .28 .32 .37 .43 .49 .55 .64 Not rated or not available Soil Rating Points .02 .05 .10 .15 .17 .20 .24 .28 .32 .37 .43 .49 .55 .64 Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads K Factor, Whole Soil K Factor, Whole Soil— Summary by Map Unit — Larimer County Area, Colorado (CO644) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 53 Kim loam, 1 to 3 percent slopes .32 0.0 0.1% 54 Kim loam, 3 to 5 percent slopes .32 2.9 38.8% 63 Longmont clay, 0 to 3 percent slopes .17 0.4 5.0% 65 Midway clay loam, 5 to 25 percent slopes .24 0.0 0.2% 74 Nunn clay loam, 1 to 3 percent slopes .20 1.2 16.4% 90 Renohill clay loam, 3 to 9 percent slopes .20 0.4 4.8% 106 Tassel sandy loam, 3 to 25 percent slopes .24 2.6 34.7% Totals for Area of Interest 7.6 100.0% Description 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. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Layer Options (Horizon Aggregation Method): Surface Layer (Not applicable) K Factor, Whole Soil—Larimer County Area, Colorado K Factor, Whole Soil - Larimer County Area, Colorado Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 11/25/2013 Page 3 of 3 Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Larimer County Area, Colorado Survey Area Data: Version 7, May 1, 2009 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Apr 22, 2011—Nov 18, 2011 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. K Factor, Whole Soil—Larimer County Area, Colorado (K Factor, Whole Soil - Larimer County Area, Colorado) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 11/25/2013 Page 2 of 3 Survey Area Data: Version 7, May 1, 2009 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Apr 22, 2011—Nov 18, 2011 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydrologic Soil Group—Larimer County Area, Colorado (Fort Collins Housing Authority) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/18/2013 Page 2 of 4 Date Date Date City of Fort Collins, Colorado UTILITY PLAN APPROVAL Parks and Recreation Traffic Engineer Stormwater Utility Water & Wastewater Utility City Engineer CHECKED BY: APPROVED: Date Environmental Planner 678',2&203/(7,9$,1&&23<5,*+7‹ CIVIL: MECHANICAL/PLUMBING: STRUCTURAL: ARCHITECT: STUDIO COMPLETIVA ELECTRICAL: LANDSCAPE ARCHITECT: azur ground JVA KL&A MOUNTAIN AIRE wAyne's ELECTRIC REDTAIL PONDS PSH FORT COLLINS HOUSING AUTHORITY CD1.2