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Home My WebLink AboutRIGDEN FARM FILING SIX, TRACT Z, MULTI-FAMILY - FDP - FDP150004 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLANSWMP Rigden Farms Tract Z Fort Collins, CO Site Description A. Construction of Rigden Farm Tract Z, which includes grading, pipeline installation, concrete installation, street installation, which will help support a residential development B. Install of erosion control BMPs, set up staging area, install concrete wash-out, PLEASE refer to site map for the remainder of construction sequences C. The total area to be disturbed by this project is estimated at 3 acres. This includes areas along construction route, permanent and temporary construction easement, haul roads, staging area. D. The subsurface soils at the site consisted of primarily of sand, clay stone, and gravely soil. For further information on the soil please refer to soil report. E. The existing vegetation is native grass and broad leaf weeds. Ground cover is approximately 80%. F. Potential Pollutants: Soil erosion into box elder ditch; Slurry into the box elder ditch, excavation, construction, stockpiling of soil, road access to and from staging area. Fuel; fueling of equipment and vehicles at staging area (any fuel spills will be handled immediately following Crow Creek guidelines). Chemical; oil, grease, lubricants, port o potty (at staging area) (any chemical spills will be handled immediately following Crow Creek guidelines). G. Allowable sources of non-stormwater discharge are but not limited to; concrete wash out, landscape irrigation, and water for fire rescue H. The 1st receiving water is a box elder ditch, into the Cache la Poudre River. MS4 is the City of Fort Collins. Site Map A. See attached A. SWMP Administrator: Joe Schumacher Civil Engineer / Project Manager Crow Creek Construction, LLC 7251 W. 20th Street, L-200 Greeley, CO 80634 Infrastructure Development (P) 970.330.5070 * (F) 970.330.6044 * (C) 970.397.9880 Stormwater Management Controls B. 1. Excavation of soil and stock piles will most likely be a daily occurrence for the first few weeks of the project. The use of straw wattle and or earth berms will be used as the BMP to contain any sediment into the box elder ditch. 2. Vehicle tracking will be maintained on a daily basis. The areas that may be affected are Denver Dr, Drake Rd, Exmoor Ln, and Des Moines Dr . If significant rainfall should occur during the duration of the project, any and all vehicle traffic will be stopped. 3. Management of any contaminated soil will happen immediately and will follow guidelines set by Crow Creek. These policies and procedures are directed by the State of Colorado as well as the Environmental Protection Agency. Areas of concern will be the staging area, to and from traffic, as well as the active daily construction areas. 4. The loading and unloading of all operations will be done at the staging area (see site map). 5. Storage of materials, fuel, chemicals will be at the staging area (see site map). Fuel tank will be in secondary containment. All oils and lubricants will be stored in the enclosed trailer. 6. The fueling of vehicles and equipment will be done at the staging area. If any general maintenance needs to be done; this will take place at the staging area. If any major repairs are need on equipment; this will be done at an offsite location. 7. If any dust or particulate (air borne) start occurring from construction traffic. A water truck will be used to wet down areas to minimize dust. 8. Daily routine maintenance and clean up (if needed) will include but not limited to the fuel tank, oil, lubricants, and grease and degreases. All maintenance will be done at staging area (see site map) 9. On site waste disposal will consist of a roll off dumpster. Which will be dumped as needed throughout the duration of the project. 10/11. A concrete wash out will be installed (see site map).This shall be monitored and cleaned out as needed to insure proper use and the contents hauled to the dump. 12. All non-industrial waste (common trash) will be contained in a roll off dumpster. Port o pottys will be used at the staging area and staked down to prevent tipping. 13. Construction activities shall be completed to limit the extent of materials handling to only that which is required to complete construction of the site. Topsoil removed and stockpiled will be provided with straw wattle barrier surrounding the pile to prevent the soil to enter into the borrow ditch. A specific site will be designated for parking and fueling of equipment (staging area). Any inadvertent fuel or oil spill will be removed immediately from the site and disposed of offsite. (* please refer to specific lot map for placement of BMP). C. 1. Structural Practices for Erosion and Sediment Control: Structural practices will include physical processes that will greatly reduce or eliminate the movement of sediment or other sources of pollutants into the storm water systems. The site map will show the proposed structural practices proposed to protect the site during construction. These processes will be sequenced to coordinate with the actual construction activity and be placed at the appropriate times prior to, or upon completion of that activity, or during the interim between two construction activities. Structural practices to be implemented on this project will include but not limited to: Straw wattle, berms, v-ditch, silt fence, inlet protection, secondary containments, sediment basin, dewatering, concrete wash out, temporary seeding and vehicle tracking pad 2. Non-Structural Practices: Such as preventive maintenance or persevering natural vegetation, are mainly definitions of operational or managerial techniques. Non- structural practices to be implemented on this project will include but not limited to: Use of existing vegetation, soil roughening, seeding and mulching, of soil that will be exposed for 30 days or more and not actively constructed upon, cleaning of sediment onto roadways, limit construction traffic to limited areas, require fuel in specific area, require control and clean up of inadvertent spills, provide a spill prevention plan/cleanup plan. 3. Phased BMP Implementation: The staging area, vehicle tracking pad, concrete wash out, all secondary containment devices, waste containments and port o pottys will be installed/constructed before construction is set to begin. The installation of straw wattle and or earth berms (see site map) will be installed prior to excavation and will be used to contain sediment from entering into borrow ditch. Soil roughening will happen immediately and maintained as needed during the duration of the project. Seeding and mulching and or landscaping will follow behind final grade and will be maintained until final stabilization. 4. Material Handling and Spill prevention: Construction activities shall be completed to limit the extent of materials handling to only that which is required to complete construction of the site. Topsoil removed and stockpiled will be provided with straw wattles surrounding the pile to prevent the movements of sediment until it is moved back into place. A specific site will be designated for parking and fueling of equipment. Any spill will be removed immediately from the site and properly disposed of offsite. Concrete wash out will be provided for any truck wash out required at the exit of the project (see site map). The concrete wash out shall be monitored and cleaned of concrete when needed and the material hauled to the dump. 5. Final Stabilization: Final stabilization will be accomplished by re-vegetation. Included in re-vegetation will be the seeding/crimping of a dry land grass mix in the areas disturbed and the install of landscaping. The final stabilization of the project will occur when the crop of dry land grass mix, or otherwise, has been established and the cover is is 70% of original vegetation growth. 6. Inspection and Maintenance: The contractor shall maintain the controls and practices discussed in the SWMP per the requirements of the Colorado General Permit. The erosion control features shown on the site plan will be inspected every 14 days or after and significant storm event. Preventive maintenance shall be identified during the inspections and carried out as soon as possible. Maintenance will include but not limited to: resetting/replacing straw wattle, maintaining berms, cleaning of sediment onto road ways, removal of sediment from sediment traps. Contractor will be responsible for maintaining erosion control inspections and maintenance logs. Project: Disturbed Acres: 0.69 EROSION CONTROL BMPs Units Estimated Quantity Unit Price Total Price L.F. 1500 $2.00 $3,000.00 Sub-Total: $3,000.00 1.5 x Sub-Total: $4,500.00 Amount of security: $4,500.00 Total Acres x Price/acre: $752.10 $1,090.00 Sub-Total: $752.10 1.5 x Sub-Total: $1,128.15 Amount to Re-seed: $1,128.15 Minimum escrow amount: $3,000.00 Erosion Control Escrow: $4,500.00 Miniumum Escrow Amount Unit Price of Seeding per acre: “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” (add all other BMPs for the site in this list) Final Escrow Amount Erosion and Sediment Control Escrow/Security Calculation for The City of Fort Collins BMP Amount Sediment Control Log Reseeding Amount 11/13/2014 10:20 AM C:\Users\dhull\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\3F7YSW5N\Erosion Control Escrow.xls