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HomeMy WebLinkAboutPLATTE RIVER POWER AUTHORITY CAMPUS - FDP - FDP180004 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLAN1501 Academy Ct. Ste. 203 Fort Collins, Colorado 80524 (970) 530-4044 Stormwater Management Plan (Erosion Control Report) Platte River Power Authority HQ Campus Fort Collins, CO Prepared for: Platte River Power Authority 2000 East Horsetooth Road Fort Collins, CO 80525 February 14, 2018 1501 Academy Ct. Ste. 203 Fort Collins, Colorado 80524 (970) 530-4044 February 14, 2018 Platte River Power Authority 2000 East Horsetooth Road Fort Collins, CO 80525 RE: Platte River Power Authority HQ Campus Fort Collins, Colorado Project Number: U16014 To Whom It May Concern: United Civil Design Group, LLC. (United Civil), is pleased to submit this Stormwater Management Plan (SWMP) for the Platte River Power Authority Headquarters Campus site in Fort Collins, Colorado. This report outlines what control measures or Best Management Practices (BMPs) to be implemented with the proposed construction, in order to minimize potential pollutants in stormwater discharges. We have prepared this report to accompany the Colorado Department of Public Health and Environment General Permit for Stormwater Discharges Associated with Construction Activity. Please note that this document is intended to be a dynamic document which will be modified and updated through the course of site construction to accurately reflect site conditions at all times. Pollutant sources should be continuously evaluated, BMPs selected, documented, implemented, and pollutant sources re-evaluated. As such, this version of the SWMP was prepared to facilitate initial plan approvals and permitting, but does not necessarily reflect the final version, or the transitions throughout the construction process. It shall be the responsibility of the Construction Site Operator and/or the permit holder (or applicant thereof) to ensure the plan is properly maintained and followed. The Construction Site Operator or SWMP Administrator for this project is: David Kelly of FCI Constructors, Inc., and can be contacted at: Address: 4015 Coriolis Way, Frederick, CO 80504 Phone: (970) 535-4725 If you should have any questions or comments as you review this report, please feel free to contact us at your convenience. Sincerely, Kevin Brazelton, PE Engineering Manager Stormwater Management Plan Registry Ridge Seventh Filing Fort Collins, CO i U16014-SWMP.docx TABLE OF CONTENTS PAGE I. Introduction ........................................................................................................................ 1 A. SWMP Objective ............................................................................................................. 1 II. Site Location and Description ............................................................................................. 1 A. Location .......................................................................................................................... 1 B. Description of Property .................................................................................................. 2 C. Description of Development .......................................................................................... 3 D. Construction Activity Description ................................................................................... 3 E.Proposed Sequence for Major Activities and BMP Staging and Implementation ........... 3 F.Area Estimates ................................................................................................................. 4 G. Runoff Coefficient and Soil Description ......................................................................... 4 H. Location and Description of Potential Pollution Sources ............................................... 6 I. Non-Stormwater Components of Discharge ................................................................... 8 J. Receiving Waters ............................................................................................................. 9 III. BMPs for Stormwater Pollution Prevention ....................................................................... 9 A. Erosion and Sediment Controls ...................................................................................... 9 B. Erosion Control Sequencing ......................................................................................... 13 C. Materials Handling and Spill Prevention ...................................................................... 15 IV. Other Controls .................................................................................................................. 15 V. Final Stabilization .............................................................................................................. 16 VI. Long-term Stormwater Quality ......................................................................................... 16 VII. Inspection and Maintenance Procedures ......................................................................... 17 VIII. References ........................................................................................................................ 19 APPENDICES APPENDIX A - State of Colorado Forms APPENDIX B - Erosion and Sediment Control Inspection List (ESCIL) APPENDIX C - SWMP Maps, Plans, and Details. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO i U16014-SWMP.docx VICINITY MAP Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 1 U16014-SWMP.docx I. Introduction A. SWMP Objective The objective of this Stormwater Management Plan (SWMP) for Platte River Power Authority Headquarters Campus, is to identify the BMP which, when implemented, will meet the requirements of the Colorado Department of Public Health & Environment (CDPHE), Water Quality Control Division. According to Appendix A of the State of Colorado General Permit Application and Stormwater Management Plan Guidance for Stormwater Discharges Associated with Construction Activity (6/2011), the SWMP goal is to, “describe appropriate controls and measures to improve water quality by reducing pollutants in storm water discharges and ensure compliance with the requirements of the storm water permit. The SWMP must be completed and implemented at the time the project breaks ground and revised if necessary as construction proceeds to accurately reflect the conditions and practices at the site.” Pollutant sources should be continuously evaluated, BMPs selected, documented, implemented, maintained and pollutant sources re-evaluated (and the process continued). A current copy of the SWMP shall be kept onsite at all times. A person familiar with the SWMP and on-site construction activities and clean-up procedures will be designated as the SWMP Administrator for the site. The SWMP Administrator will be responsible for, but not limited to, inspections and inspection reports, personnel training, regulatory agency contact, SWMP implementation and revisions, field notebooks, and record keeping of employee activities, contacts notifications and perform or direct the performance of BMP maintenance as required. References are found in the Appendix regarding some of the requirements, restrictions, and forms related to the SWMP. II. Site Location and Description A. Location The Platte River Power Authority Headquarters Campus (referred herein as ”the site” or “the Campus”) is a parcel of land situated in the Southeast Quarter of Section 30, Township 7 North, Range 68 West of the 6th Principal Meridian to the City of Fort Collins, Larimer County, Colorado. More specifically, the site is located at the northwest corner of Horsetooth Road and Timberline Road and is bounded by East Horsetooth Road to the south, Timberline Road to the east, existing commercial property and Danfield Court to the north, and Union Pacific Railroad right-of-way to the west. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 2 U16014-SWMP.docx B. Description of Property The campus has an existing platted area of 16.7-acres and has acted as the headquarters for Platte River Power Authority since it was first constructed in the late 1970s. The following is a summary of the existing conditions: Ground Cover - The site currently exists as commercial property and is currently covered with various buildings, pavements and open areas. Grades – The majority of the site slopes towards one of three (3) drainage outfalls. In general, the slopes within each outfall basin range between 0 to 5 percent, with some landscaped berm areas reaching near 20%. Soil Type - According to the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) Soil Survey, the site consists of Nunn clay loam (Hydrologic Soil Group C). Utilities – The campus includes an extensive network of existing utilities including mains and services for water, sanitary sewer, natural gas, electric, telephone and data lines. These mains and services are located within the property limits of the campus along with mains located within the rights-of-ways for Horsetooth Road, Timberline Road and Danfield Court. Detention Ponds and Storm Sewer – The campus currently has three (3) drainage outfalls available to accept stormwater flows from the site. These include the existing wet pond which currently acts as an irrigation and stormwater retention facility for the campus, an existing 12-inch storm sewer located at the east side of the campus along Timberline Road, and the curb and gutter at the Danfield Court cul-de-sac. There are also two (2) other internal detention areas that drain to the 12-inch storm sewer outfall. The campus also has limited internal storm drains varying in size from 4-inch to 15-inch. Of note, there is an existing storm inlet and drain located on the north side of Horsetooth Road that collects stormwater from the roadway and conveys it into the existing wet pond on the south side of the property. This existing system will require to be maintained and/or replaced with the construction of the proposed project. Drainageways – No known externally owned drainageways currently exist within the proposed development limits. Irrigation - City records indicate that there is an existing irrigation pipe located along the southern property boundary, running from west to east. Only portions of this irrigation system have been found or identified with utility locates or site survey but from the information available it is believed that this system consists of a 20-inch concrete pipe that is located just north of the existing curb and gutter along Horsetooth Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 3 U16014-SWMP.docx Road. The existing onsite wet Pond A1 also serves as an irrigation system and is supplied by an existing irrigation well located on the campus. Floodplains – The campus is not located within either a City or FEMA floodplain. C. Description of Development The planned campus redevelopment is planned to be constructed in phases. Ultimately, the campus redevelopment will consist of the following improvements: • The demolition of most of the existing buildings and much of the existing pavements throughout the campus. • The construction of seven (7) proposed commercial buildings including the main headquarters building and various other support buildings. • The construction of an internal roadway network with associated parking areas. • The construction of utilities in support of the campus including sanitary, water and storm drainage. • The construction of detention and water quality facilities located throughout the site with the main detention area located in the northeast portion of the site. • The reconfiguration and relining of the existing wet pond. D. Construction Activity Description Construction activity (for all phases of construction) includes installation of BMPs, demolition, grading, utility (storm sewer, sanitary sewer, and waterline) construction, pavement construction, drainage and water quality facility construction, and landscape installation. E. Proposed Sequence for Major Activities and BMP Staging and Implementation The four (4) major Development Stages as previously defined by the State of Colorado’s Stormwater Discharge Permit (SDP) and include the following: Stage 1. Demolition and Grading Stage; BMPs for initial installation of perimeter and site controls as well as overlot grading of the site Stage 2. Infrastructure Stage; BMPs for final grading, storm and utility installation Stage 3. Impervious Condition/Vertical Construction Stage; BMPs for curb and pavement installation and for construction of buildings Stage 4. Permanent BMPs and final site stabilization Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 4 U16014-SWMP.docx The estimated sequence for major construction activities is as follows: • Installation of erosion control (Stage 1) • Site demolition activities (Stage 1) • Grading of the site (Stage 1) • Installation of utilities (storm sewer, sanitary sewer and storm sewer) (Stage 2) • Construction of asphalt pavement, curb and gutter, sidewalk and buildings (Stage 3) • Landscaping and site stabilization (Stage 4) Construction is estimated to begin April 2018 and be completed by August 2020. Along with the stages of development previously described, the construction of the project will also have two (2) distinct construction phases. Included within Appendix C are the Erosion Control Plans that reflect each construction phase for the project. Also included is a “Blank Version” of the SWMP Plan which is provided so that the Contractor can write in BMP symbols to document the location and time BMPs are installed and maintained during the construction process. F. Area Estimates The site has a platted area of 16.7 acres. The total area subject to disturbance by construction of this project is approximately 14.6 acres. This SWMP does not include additional offsite area (for staging, material storage, overburden stockpiles of dirt, borrow areas, etc.) other than that mentioned above. G. Runoff Coefficient and Soil Description Individual basin runoff coefficients as shown in the Platte River Power Authority HQ Campus Drainage Plan are summarized in the table on the following page: Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 5 U16014-SWMP.docx Developed Conditions "C" Values and 2-yr and 100-yr Runoff: Existing Basins Basin Design Pt. Area %I Runoff Coefficients Peak Discharge acre C2 C100 Q 2 Q100 cfs cfs EX1 EX1 3.75 48.6% 0.57 0.71 6.10 26.62 EX2 EX2 2.38 32.3% 0.44 0.55 2.07 9.04 EX3 EX3 2.19 80.4% 0.82 1.00 5.10 21.75 EX4 EX4 2.33 18.9% 0.34 0.42 1.68 7.33 EX5 EX5 1.35 12.5% 0.28 0.35 0.81 3.53 OS-1 OS-1 0.31 20.5% 0.35 0.43 0.30 1.32 OS-2A OS-2A 0.33 26.6% 0.39 0.49 0.37 1.61 OS-2B OS-2B 0.93 80.2% 0.81 1.00 2.00 8.62 OS-3 OS-3 2.21 20.1% 0.34 0.43 1.45 6.33 OS-4 OS-4 1.29 73.3% 0.75 0.94 2.75 12.00 OS-5 OS-5 0.54 2.0% 0.20 0.25 0.24 1.05 Totals 22.88 99.21 Proposed Basins Basin Design Pt. Area Area Runoff Coefficients Peak Discharge acre acre C2 C100 Q 2 Q100 cfs cfs A-1 A-1 3.49 16.4% 0.32 0.40 2.16 9.43 A-2 A-2 0.91 0.82 0.83 1.00 2.15 9.10 A-3 A-3 0.37 0.90 0.95 1.00 1.01 3.71 A-4 A-4 0.57 0.87 0.86 1.00 1.39 5.64 A-5 A-5 0.40 0.85 0.84 1.00 0.95 3.96 A-6 A-6 0.41 0.41 0.53 0.67 0.62 2.72 A-7 A-7 0.32 0.53 0.63 0.79 0.54 2.37 A-8 A-8 0.21 0.62 0.71 0.89 0.42 1.84 A-9 A-9 0.64 0.90 0.95 1.00 1.74 6.41 A-10 A-10 0.68 0.87 0.92 1.00 1.78 6.74 A-11 A-11 0.97 0.27 0.41 0.51 1.06 4.63 A-12 A-12 1.15 0.06 0.23 0.29 0.68 2.95 A-12 (Future) A-12 (Future) 1.15 0.90 0.87 1.00 2.86 11.43 A-13 A-13 0.26 0.90 0.95 1.00 0.72 2.63 B-1 B-1 0.42 0.53 0.61 0.76 0.74 3.22 B-2 B-2 1.45 0.43 0.52 0.65 1.90 8.28 C-1 C-1 1.23 0.11 0.28 0.35 0.98 4.27 OS-1 OS-1 0.68 0.02 0.20 0.25 0.33 1.42 OS-2A OS-2A 0.21 0.02 0.20 0.25 0.12 0.51 OS-2B OS-2B 0.93 0.80 0.81 1.00 2.00 8.62 Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 6 U16014-SWMP.docx Terracon, completed the geotechnical and groundwater investigations for the project site. According to the results presented in the report produced by Terracon, there are lean clay soils with varying amounts of sand overlying claystone bedrock. Groundwater was observed at depths of approximately 12 to 24 feet below ground surface. According to the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) Soil Survey, the site consists of Nunn clay loam (Hydrologic Soil Group C). H. Location and Description of Potential Pollution Sources This section focuses on the identification of the potential pollutant sources and briefly discusses the Best Management Practices (BMPs) that will be used. More information on the BMPs utilized on this site is included in the next section “III. BMPs for Stormwater Pollution Prevention”. 1. All disturbed and stored soils; It is expected that there will be stockpiles of dirt on the site from the utility installations, the foundation excavations and general earthwork phasing. For this site, stockpiles should be located in areas where Silt Fence or Straw wattles may be placed around the individual stockpiles to contain the runoff (i.e. landscaped or disturbed earth areas). 2. Vehicle tracking of sediments It is anticipated that the contractor will access the property from Danfield Court and Horsetooth Road. A vehicle tracking control pad will be required at each access location onsite during construction to reduce tracking sediment onto the adjacent streets. At the end of each workday, the Contractor shall sweep or scrape Danfield Court, Horsetooth Road and the private access drive from Danfield Court of sediment that may have accumulated during the workday. 3. Management of contaminated soils There are not any known contaminated soils on the site. However, if the contractor encounters contaminated soils during the construction process they should stop construction immediately and notify the appropriate government authorities in accordance with good construction safety and practice. 4. Loading and Unloading operations Loading and unloading will take place on the site. Truck access should be limited to the extent possible to locations within the disturbed limits of the project. BMPs Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 7 U16014-SWMP.docx such as silt fence in non-paved areas and rock socks in paved areas should be placed to keep sediment from exiting the disturbed area limits. 5. Outdoor storage activities (building materials, fertilizers, chemicals, etc.) Storage of onsite materials including building materials, fertilizers, waterline, storm sewer, and sanitary sewer will be covered and placed on pallets to prevent direct contact with the ground and potential surface runoff. 6. Vehicle and equipment maintenance Vehicle and equipment maintenance should be performed offsite or onsite within an area surrounded by silt fence or straw wattles. Vehicle and equipment maintenance shall not happen along the adjacent public streets. At a minimum, all vehicle and equipment maintenance shall be performed on the hard surface or gravel areas at least 50’ from any stormwater feature (i.e. inlet, storm sewer, concentrated runoff, swale, etc.) 7. Significant dust or particulate generating processes The Contractor shall comply with applicable air pollution control requirements of the City of Fort Collins. The Contractor shall take appropriate actions to minimize atmospheric pollution and take reasonable precautions which shall include, but not be limited to: 1. The use of water for control of dusts for construction processes such as demolition, grading, or the clearing of land. 2. Covering, at all times when in motion, open-bodied trucks transporting materials likely to give rise to airborne dusts. 3. Require lower speeds for vehicles entering, exiting, and driving within the project limits to minimize the amount of dust disturbed by moving vehicles. 8. Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc; Chemicals, fuels, lubricants, and paints stored on-site will be in water tight containers and covered as necessary and stored in a bermed area, a storage building, or within a vehicle to act as secondary containment. 9. On-site waste management practices (waste piles, liquid wastes, dumpsters, etc.); 1. Waste piles should be covered or surrounded by silt fence or straw wattles. Liquid wastes should be collected and stored in covered containers and disposed of properly. 2. Solid waste materials, including disposable materials incidental to the major construction activities, will be collected in on site dumpsters. The Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 8 U16014-SWMP.docx containers will be emptied periodically and trucked away from the site. Dumpsters should have covers. 10. Concrete truck / equipment washing, including the concrete truck chute and associated fixtures and equipment; A dedicated concrete washout area is necessary for this project. The contractor shall clean out equipment within the washout area so that runoff is not allowed to leave site and enter the public streets or neighboring properties. 11. Dedicated asphalt and concrete batch plants; There will not be dedicated asphalt or concrete batch plants on this site. 12. Non-industrial waste sources such as worker trash and portable toilets Worker’s trash shall be disposed of in an onsite dumpster. The site should be free of trash at the end of each working day. Portable toilets shall be utilized by construction personnel and serviced regularly by a commercial operator. They shall be located a minimum of 5 feet from the curb or 50 feet from inlets. If sanitary facilities are located on a paved surface, toilets shall be equipped with a containment pan or a secondary containment BMP. Regardless of location all portable toilets shall be anchored per manufacturer recommendations. I. Non-Stormwater Components of Discharge In the event that groundwater is encountered during trenching or excavation operations, a temporary sediment/retention basin should be constructed to store pumped uncontaminated dewatering flows onsite. Note that the CDPHE may also require a separate Construction Dewatering permit. For more information on construction dewatering refer to the Stormwater Fact Sheet which can be found at https://www.colorado.gov/cdphe. Refer to the blank Construction Dewatering Permit in Appendix A for more information. The other non-storm water components of discharge include, but are not limited to, water line flushing, irrigation to establish seeding, washing out concrete trucks, and watering for dust mitigation, and compaction. It is important for the contractor to manage the runoff from these items utilizing the BMPs mentioned in this report (i.e. sediment traps, silt fence, straw wattles, concrete washout areas, surface roughening, etc.). Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 9 U16014-SWMP.docx J. Receiving Waters The site is located within the Foothills drainage basin within the City of Fort Collins Master Drainage Plan. Stormwater from this basin adjacent to the site is collected within streets and storm sewer systems and ultimately discharged into the Fossil Creek Reservoir Inlet Ditch. III. BMPs for Stormwater Pollution Prevention A. Erosion and Sediment Controls Once construction activity begins, Best Management Practices (BMPs) intended to contain sediment onsite must be constructed, inspected, and repaired as necessary. Such controls must be functional before upslope land disturbance takes place. The BMPs will be installed as shown on the SWMP Map shown in Appendix C. They must be supplemented as on-site experience proves necessary in order to control sediment, pollutant discharge, and ensure public safety. The following temporary and permanent BMPs will be installed and maintained to control on-site erosion and prevent sediment from traveling off-site during construction. Temporary BMPs • Construction Fence is a temporary BMP. The contractor is to place construction fencing around development as needed to limit access by the public to the construction site, as well as construction equipment and personal vehicles to designated areas of ingress and egress. • Inlet Protection is a temporary BMP that helps prevent soil and debris from the site from entering the storm drain inlets and usually consists of a sediment filter around or upstream of the storm drain inlet. Inlet protection allows storm water to flow into the drain but only after excess sediment has been filtered out. Inlet protection will be used and installed on existing storm inlets prior to construction activities commencing and will be used and installed on proposed storm inlets as construction of the storm sewer system occurs. Inlet protection for this site will consist of: o Inlet Filters, which are permeable barriers installed around curb or area inlets that filter runoff and remove sediment prior to entering the inlet. For this project Dandy products (or approved equal) will be installed per manufacturer’s recommendations. • Regular Meetings are a temporary and non-structural BMP. Regular meetings with on-site workers including builders, suppliers, landscape personnel, etc. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 10 U16014-SWMP.docx should be conducted so that they are kept up to date with site standard operating procedures. • Silt Fence is a woven synthetic permeable fabric that prevents sediment from discharging off-site. Silt fence is a temporary barrier that is installed prior to earthmoving activities and is placed downstream of areas where runoff from construction activities is expected to occur, especially along the site perimeter to allow sediment to settle out from the stormwater runoff before the stormwater leaves the construction site. Silt fences will be installed per manufacturer’s recommendations. Silt fence encourages sheet flow and is not intended to be used in areas of concentrated flow. If concentrated flow is encountered during the placement of the fence, an alternative BMP shall be used and the SWMP should be updated to reflect this change. • Staging Areas will be provided during the construction process at least 100’ from any storm water conveyance. Staging areas include locations for vehicle fueling, concrete truck washout, material storage and transfer, equipment maintenance and cleaning, and other construction activities. These areas will be maintained as isolated locations that allow for contaminants to be concentrated and removed from the site as necessary. Concrete washout areas shall be designed such that washout water cannot leave the location, nor shall storm water runoff wash concrete from the locations. • Straw Wattles are a temporary BMP that are used for a variety of purposes. They are used for inlet protection, curbside check dams, swale protection, at the bottom of slopes, or the limits of property boundaries. They are easy to install and are increasingly being used for Small Site SWMP’s. The straw wattles, which are meshed netting “tubes,” filled with straw, excelsior, or coconut fiber. Wattles for swale protection should be installed following rough grading of channel areas. Wattles require proper installation and maintenance to ensure their performance. • Rock Socks are a temporary BMP that are used for a variety of purposes. They are used for inlet protection, curbside check dams, or at the limits of property boundaries. Rock socks are wire meshed “tubes” filled with rocks. Rock Socks require proper installation and maintenance to ensure their performance. • Street Sweeping and Vacuuming removes sediment that has been tracked onto roadways to reduce sediment transport into storm drain systems or a surface waterway. This practice should be used on the adjacent paved road to the construction site. Paved roads should be inspected on a daily basis and more frequently as needed. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 11 U16014-SWMP.docx • Saw Cutting Pollution Prevention prevents dust and slurry from asphalt and concrete saw cutting activities from migrating into the existing storm drain system. Slurry and cuttings shall be vacuumed during cutting and surface operations and shall not be allowed to remain on pavement surface overnight. Collected slurry and cuttings shall be disposed of in a manner that does not violate groundwater or surface water standards. • Surface Roughening is provided following grading activities to slow the effects of wind erosion. Roughening can be used as a temporary BMP and is a technique used for creating unevenness on bare soil through the construction of furrows (groove cuts) running across a slope or by utilization of construction equipment to track the soil surface. The primary function of surface roughening is to reduce erosion potential by decreasing runoff velocities, reducing the length of sheet flow trapping sediment, and increasing infiltration of water into the soil. • Temporary Seeding is the establishment of a temporary vegetative cover on a graded area that will be exposed for longer 30 days. Temporary seeding can be used on areas requiring temporary protection that will eventually need permanent vegetation at the completion of the construction or it can be used for areas that will be re-disturbed after a period of inactivity. • Vehicle Tracking Control is a stabilized stone pad located at points of ingress and egress on a construction site and acts as a temporary BMP. The stone pad is designed to reduce the amount of mud transported onto public roads by construction traffic by removing mud and sediment from the vehicle’s wheels when it drives over the gravel pad. These areas are limited to the minimum number necessary to provide functional construction access and are installed prior to grading activities. Whenever the construction entrance exists onto a public road, the road shall be cleaned at the end of each day. Vehicle Tracking Control will also be used on this site at any stockpile area exits. • Wind Borne Sediment and Dust Control measures will be provided during the construction process to control wind borne sediment. During grading activities, water will be applied to the disturbed soils for the purpose of maintaining cohesion with clay type soils and also to meet moisture requirements for compaction of disturbed soils. Other measures of mitigation for wind erosion may include the timely installation of seed and mulch following the establishment of final grade, and the timely installation of pavement following completion of utility trenching operations and curb construction. Open areas should be kept in a roughened condition (see Surface Roughening above). Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 12 U16014-SWMP.docx Permanent BMPs • Grass-Lined Swales (included as part of permanent seeding or other permanently stabilized swales) are permanent landscaped channels constructed generally below grade to convey runoff or channel water to a desired location. The grass-lined areas allow for infiltration to occur as well as including a flow path across a vegetated surface slowing the conveyance rate of storm water runoff. • Permanent Seeding and Planting is the establishment of a permanent perennial vegetation such as trees, shrubs, vines, grasses/sod, or legumes on exposed areas for final permanent stabilization in order to provide stabilization of the soil by holding soil particles in place. These items should be installed as per the approved Landscape Plan. Soil Amendments shall be incorporated in all landscape areas to a depth of 6” at a rate of 3 cubic yards per 1000 square feet of area unless 4” of loose topsoil have been imported onto the site over 4” of loosened subgrade soils. Permanent Landscaping reduces storm water runoff velocity, maintains sheet flow, protects the soil surface from erosion, promotes infiltration of runoff, and improves wildlife habitat. • Bioretention is a permanent BMP that is engineered to utilize a depressed landscape area to capture and filter or infiltrate the water quality capture volume. BMPs that utilize bioretention are frequently referred to as rain gardens or porous landscape detention areas. • Preservation of Existing Vegetation should occur where no construction activity is expected to occur. Preservation of natural vegetation is generally a permanent BMP and is applicable to construction sites with pre-existing vegetation. Only land needed for building activities and vehicle traffic needs is to be cleared. • Storm Sewer Outlet Protection devices are structurally lined aprons or other energy dissipating devices placed at the outlets of pipes or paved channel sections. Outlet protection devices prevent scour at storm water outlets and minimize the potential of downstream erosion by reducing the velocity of storm water flows. Concrete aprons connected to concrete pans will be used downstream of storm sewer outfalls as pipe outlet protection. Outlet Protection is installed with the storm sewer construction and serves as a permanent structural BMP. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 13 U16014-SWMP.docx B. Erosion Control Sequencing SWMP drawings are located in the Appendix that include the minimum required BMPs found on the Sediment and Erosion Control Plans. These should be revised as needed by the SWMP Administrator to accurately reflect site conditions. Erosion control sequencing should generally adhere to the following: Mobilization and Demolition • Preserve Existing Vegetation – Before construction commencement, areas that are not disturbed by construction activity should be preserved as needed with construction fencing, silt fencing, signage, or other means to keep vehicular traffic out of the area to be left undisturbed. • Silt Fence – Before construction commencement, silt fence will be placed downstream of areas where runoff from construction activities is expected to occur. • Staging Area – A concrete wash out area, fueling area, and other staging areas will be provided during the construction process at least 100’ from any storm water conveyance. A staging area is to be shown on the SWMP drawing when its location is identified. • Vehicle Tracking Control – Before commencement of construction, vehicle tracking control shall be placed at the locations shown in the SWMP plans. Any other points of ingress and egress planned by the contractor and approved by the owner shall also receive suitable vehicle tracking control BMPs. • Construction Fence – Before commencement of construction, construction fence shall be placed at the contractor’s discretion (or as shown in the plans) to limit access by construction equipment and personal vehicles to designated areas of ingress and egress. • Inlet Filters – Before commencement of construction, it may be necessary to install inlet filters to protect existing inlets in the general vicinity of the site. Utility Construction, Building Construction and Site Grading The items installed during mobilization and demolition shall be in place, functional, and maintained during and following utility construction, building construction and site grading operations. In addition to those items, the following BMPs shall be installed. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 14 U16014-SWMP.docx • Wind Borne Sediment and Dust Control – Wind borne sediment and dust control measures should be implemented during grading activities. This will be particularly important to consider prior to the establishment of seeding. • Inlet Filters – Inlet filters will be placed at curb inlets and area inlets located throughout the site immediately after the inlet is constructed / installed. Existing inlets shall be protected prior to heavy equipment staging, demolition, or commencement of construction activities. • Swale Protection – Sediment control logs will be placed within the swales immediately following rough grading. Wattles and check dams shall be placed across the swale for every 2’ of drop in swale elevation or every 300'. • Slope Protection – Surface roughening and contour furrows shall occur after rough grading. • Temporary Seeding – The majority of the landscaped areas will be permanently seeded or planted. However, if disturbed areas are left without permanent stabilization 30 days after grading, temporary seeding will be required. • Concrete Washout Area – Concrete washout areas will be placed prior to, and maintained during, the completion of concrete work. Final Grading, Pavement Construction, Landscaping and Final Stabilization This erosion control sequence will likely begin prior to the establishment of vegetation throughout the site; therefore, it is expected that majority of the BMPs shown in the previous sequences will be in place at the beginning of this phase. As paving is completed and seeding is established, previously placed BMPs such as vehicle tracking control devices and some sections of silt fence may be removed. Other erosion control measures such as inlet protection, silt fence, and swale protection may only be removed after construction is complete and/or upstream areas are established. In addition to previously installed measures, the following BMPs shall be installed. • Outlet Protection– Concrete pans/aprons will be placed immediately downstream of storm sewer outfalls. Cobble pads will be placed immediately downstream of curb cuts as shown on the construction documents. • Permanent Seeding – Permanent seeding or landscaping shall be placed immediately in areas that are final graded and where little future disturbance is expected. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 15 U16014-SWMP.docx • Rock Socks – Rock socks will be placed to replace other BMP measures as required after paving operations have been completed. C. Materials Handling and Spill Prevention Stormwater run-off generated from the staging areas determined by the Construction Site Operator or SWMP Administrator will be routed to a temporary sedimentation area where runoff will be contained and filtered before being discharged downstream. Vehicle tracking control should be placed at the stockpile area entrance/exit and silt fence should surround it. If relocated, the SWMP should be updated with the actual location of the stockpile/staging area(s). Chemicals, fuels, lubricants, and paints stored on-site will be in water tight containers and covered as necessary and stored in a bermed area, a storage building, or within a vehicle to act as secondary containment. Storage of onsite materials including building materials, fertilizers, waterline, sanitary sewer, and storm sewer will be covered and placed on pallets to prevent direct contact with the ground and potential surface runoff. Other hazardous waste disposal (that is not typical to commercial building construction) is not included within this SWMP. Concrete and asphalt batch plants are not anticipated on this site and thus are not included in this SWMP. In the event of a spill or accident, the spill shall be contained with a spill kit in order to prevent the contaminants from flowing off-site or soaking into the soil. Site personnel should be briefed in regular meetings of the presence of the spill kit and how the kit should be used in the event of a spill. Once contained, the contaminated materials shall be properly disposed of as approved by the SWMP Administrator and local, state and federal jurisdictions. Once construction is completed, or as required during the course of construction, concrete waste and contaminated soil will be disposed of properly. The SWMP Administrator, City Inspector and CDPHE should be notified immediately in the event of spills. IV. Other Controls The following includes other measures to control pollutants: • Solid waste materials, including disposable materials incidental to the major construction activities, will be collected in trash containers or dumpsters. The containers will be emptied periodically and disposed of properly at the local landfill or as directed by the SWMP Administrator. Dumpsters shall have covers. • Water used to establish and maintain grass, for dust control, and for other purposes during the construction phase must originate from a public water supply or private Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 16 U16014-SWMP.docx well approved by the Colorado Department of Public Health and Environment unless otherwise approved. • Sanitary facilities shall be provided at the site throughout construction activities. They shall be utilized by construction personnel and serviced regularly by a commercial operator. They shall be located a minimum of 5 feet from the curb or 50 feet from inlets and must be anchored. If sanitary facilities are located on a paved surface, a secondary containment BMP will need to be constructed. • Access off of paved roads should be limited. • BMPs such as tarps and drip pans will be used for painting, stucco, dry-wall etc. operations. • Super-chlorinated water used for flushing water distribution systems will be de- chlorinated prior to discharging from the site by aeration, retention, dissipation, or chemical treatment. V. Final Stabilization Final stabilization is reached when all soil disturbing activities at the site have been completed and vegetative cover has been established with a density of at least 70 percent of pre-disturbance levels or when equivalent permanent erosion reduction methods have been utilized. Upon final stabilization as determined by the SWMP Administrator and City inspector, temporary BMPs may be removed, unless they are required to remain in place for future phasing. VI. Long-term Stormwater Quality Several long-term stormwater quality measures have been selected for the site that will provide treatment of stormwater prior it to being discharged from the site, refer to Appendix C for locations of the measures chosen. For this project the following measures have been selected: Grass Swales - The soft bottom/overbank areas of the swales allow for infiltration to occur as well as including a flow path across a vegetated surface slowing the conveyance rate of storm water runoff. These have been chosen to convey and treat stormwater prior to being intercepted by storm sewer infrastructure. Grass Open Areas/Buffers – Grass open areas and/or grass buffers allow for infiltration to occur as well as including a flow path across a vegetated surface slowing the conveyance rate of storm water runoff. These have also been chosen to convey and treat stormwater prior to discharging to the bioswale, storm sewer system, or detention or wet ponds. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 17 U16014-SWMP.docx Bioswale – Bioswales, through the use of engineered permeable materials, promote the infiltration, slow the conveyance rate of stormwater runoff, and treat runoff by filtering sediment from the runoff. A bioswale has been chosen to convey and treat stormwater prior to being intercepted by storm sewer infrastructure. Underground Detention – Underground detention, in conjunction with a water quality plate, collects, stores, and slowly releases minor storm events allowing runoff to the pond, infiltrate, and settle out particulates prior to being discharged downstream to storm sewer infrastructure. Extended Detention Basin – Extended detention basins in conjunction with the use of a water quality plate, collect, store and slowly release minor storm events allowing runoff to pond, infiltrate into the grass bottom of the pond, and settle out particulates prior to being discharged from the site. An extended detention basin has been selected as a highly effective last treatment option prior to discharging runoff from the site. VII. Inspection and Maintenance Procedures Upon completion of each phase of construction, appropriate measures shall be taken to inspect and maintain existing erosion control features, as described herein or per manufacturers specifications (whichever is more stringent) and install new erosion control elements associated with each phase of construction. The temporary BMPs will be inspected and documented at a minimum of once every 14 days and after each precipitation or snowmelt event. The SWMP will be kept up-to-date with inspection records, maintenance procedures, and changes. Records should include complete inspection reports for each inspection, maintenance, and/or repair. A record-keeping system is recommended in managing inspection and maintenance reports and should include all maintenance records, spill response, weather conditions, training, correspondence, etc. A blank copy of an Erosion and Sediment Control Inspection List (ESCIL) is provided in Appendix B. Preventative maintenance also involves the regular inspection and testing of equipment, timely maintenance of the equipment, and complete records of the maintenance and inspections of the equipment. The maintenance and inspection records will be kept on site and made available to any local, state, or federal officials upon request. Inspections must include the observation of the construction site perimeter, runoff discharge points, disturbed areas, staging areas (including concrete washout areas and fueling areas), erosion and sediment control measures identified in this SWMP, and any other structural BMPs that may require maintenance. The inspection must determine if there is evidence of or potential for pollutants to enter the drainage system and, if so, whether or not the BMPs should be modified, replaced, or added to. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 18 U16014-SWMP.docx The following list includes some recommended maintenance procedures: • Erosion and sediment control measures determined, upon inspection, to be in need of repair shall be maintained before the next anticipated storm event or as necessary to maintain continued effectiveness of erosion and sediment control measures. If it is impractical to maintain erosion and sediment control measures before the next storm event, maintenance should be accomplished as soon as practical. • Locations where vehicles enter or exit the site shall be inspected for evidence of sediment being tracked off-site by construction traffic. Such sediment shall be removed at the end of each work day or before it can be conveyed to the receiving storm drains or creeks, whichever is most imminent. • Seeded areas will be checked to see that grass coverage is maintained. Areas will be watered, fertilized, and reseeded as needed. • It is the responsibility of the SWMP Administrator to maintain effective pollutant discharge controls. Actual physical site conditions or contractor practices could make it necessary to install one or more controls than those that are already shown on the Erosion Control Plans. For example, localized concentrations of surface runoff or unusually steep areas could require additional erosion control devices. Assessing the need for and implementing additional controls will be a continuing aspect of the SWMP Administrator until final stabilization. This plan intends to control water-borne and liquid pollutant discharges by some combination of interception, filtration, and containment. Parties implementing this plan must remain alert to the need to periodically refine and update the plan to accomplish the intended goals. Stormwater Management Plan Platte River Power Authority HQ Campus Fort Collins, CO 19 U16014-SWMP.docx VIII. References 1. Final Drainage Report for Platte River Power Authority HQ Campus, United Civil Design Group, February 14, 2018. 2. Larimer County Urban Area Street Standards, Larimer County, Colorado, Repealed and Reenacted, Effective April 1, 2007. 3. Natural Resources Conservation Service Web Soil Survey at www.websoilsurvey.nrcs.usda.gov/app. 4. Geotechnical Engineering Report, PRPA New Headquarters Campus, 2000 East Horsetooth Road, Fort Collins, Colorado, Terracon, November 3, 2017. 5. Fort Collins Stormwater Criteria Manual, City of Fort Collins, Colorado, as adopted by Ordinance No. 174, 2011, and referenced in Section 26-500 (c) of the City of Fort Collins Municipal Code. 6. Urban Storm Drainage Criteria Manual, Volumes 1-3, Urban Drainage and Flood Control District, Wright-McLaughlin Engineers, Denver, Colorado, Revised April 2008. 7. State of Colorado, Stormwater Discharges Associated with Construction Activity, Stormwater Management Plan Preparation Guides, www.colorado.com. APPENDIX A State of Colorado Forms • State of Colorado General Permit Application • Water Quality Control Division Colorado Discharge Permit System Application for Construction Dewatering Wastewater Discharge • Notice of Reassignment of Permit Coverage • Notice of Transfer and Acceptance of Terms • Notice of Termination STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION COLORADO DISCHARGE PERMIT SYSTEM (CDPS) PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED. For Applications submitted on paper - Please print or type. Original signatures are required. All items must be completed accurately and in their entirety for the application to be deemed complete. Incomplete applications will not be processed until all information is received which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach additional sheets to the application form. Applications or signature pages for the application may be submitted by mail or hand delivered to: Colorado Department of Public Health and Environment, 4300 Cherry Creek Drive South, WQCD-P-B2, Denver, CO 80246-1530 For Applications submitted electronically Please note that you can ONLY complete the feedback form by downloading it to a PC or Mac/Apple computer and opening the Application with Adobe Reader or a similar PDF reader. The form will NOT work with web browsers, Google preview, Mac preview software or on mobile devices using iOS or Android operating systems. If application is submitted electronically, processing of the application will begin at that time and not be delayed for receipt of the signed document. Any additional information that you would like the Division to consider in developing the permit should be provided with the application. Examples include effluent data and/or modeling and planned pollutant removal strategies. Beginning July 1, 2016, invoices will be based on acres disturbed. DO NOT PAY THE FEES NOW – Invoices will be sent after the receipt of the application. Disturbed Acreage for this application (see page 4) Less than 1 acre ($83 initial fee, $165 annual fee) 1-30 acres ($175 initial fee, $350 annual fee) Greater than 30 acres ($270 initial fee, $540 annual fee) Responsible Person (Title): PERMIT INFORMATION Reason for Application: NEW CERT RENEW CERT EXISTING CERT# Applicant is: Property Owner Contractor/Operator A. CONTACT INFORMATION - *indicates required * PERMITTED ORGANIZATION FORMAL NAME: 1) * PERMIT OPERATOR - the party that has operational control over day to day activities - may be the same as owner. Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: (i) The authorization is made in writing by the permittee (ii) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and (iii) The written authorization is submitted to the Division SW Construction Application for: page 1 of 5 ASSIGNED PERMIT NUMBER _____________________________ Date Received _____/_____/_____ MM DD YYYY Revised: 10-2017 Responsible Person (Title): 2) OWNER - party has ownership or long term lease of property - may be the same as the operator. Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Same as 1) Permit Operator Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: i. The authorization is made in writing by the permittee. ii. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and iii. The written authorization is submitted to the Division. Responsible Person (Title): Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Same as 1) Permit Operator 4) *BILLING CONTACT if different than the permittee. 3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit for the facility Responsible Person (Title): Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Same as 1) Permit Operator SW Construction Application for: page 2 of 5 Responsible Person (Title): 5) OTHER CONTACT TYPES (check below) Add pages if necessary: Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Environmental Contact Inspection Facility Contact Consultant Compliance Contact Stormwater MS4 Responsible Person Stormwater Authorized Representative B) PERMITTED PROJECT/FACILITY INFORMATION Latitude Project/Facility Name Street Address or Cross Streets (e.g., Park St and 5 Ave; CR 21 and Hwy 10; 44 Ave and Clear Creek) ; A street name without an address, intersection, mile marker, or other identifying information describing the location of the project is not adequate. For linear projects, the route of the project should be described as best as possible using the starting point for the address and latitude and longitude – more clearly defined in the required map ) Facility Latitude/Longitude - List the latitude and longitude of the excavation(s) resulting in the discharge(s). If the exact soil disturbing location(s) are not known, list the latitude and longitude of the center point of the construction project. If using the center point, be sure to specify that it is the center point of construction activity. The preferred method is GPS and Decimal Degrees. . Longitude Decimal Degrees (to 5 decimal places) . Decimal Degrees (to 5 decimal places) (e.g., 39.70312°, 104.93348°) This information may be obtained from a variety of sources, including:  Surveyors or engineers for the project should have, or be able to calculate, this information.  U.S. Geological Survey topographical map(s), available at area map stores.  Using a Global Positioning System (GPS) unit to obtain a direct reading.  Google - enter address in search engine, select the map, right click on location, and select “what’s here”. Note: the latitude/longitude required above is not the directional degrees, minutes, and seconds provided on a site legal description to define property boundaries. C) MAP (Attachment) If no map is submitted, the application cannot be submitted. Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be disturbed. A vicinity map is not adequate for this purpose. Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply Township/Range/Section or metes and bounds description of site) Subdivision(s): Lot(s): Block(s) OR Not applicable (site has not been subdivided) SW Construction Application for: page 3 of 5 City: County: Zip Code: D) LEGAL DESCRIPTION - only for Subdivisions Total area of project disturbance site (acres): E) AREA OF CONSTRUCTION SITE - SEE PAGE 1 - WILL DETERMINE FEE Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g., stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage that disturb existing vegetative cover. Part of Larger Common Plan of Development or Sale, (i.e., total, including all phases, filings, lots, and infrastructure not covered by this application) Provide both the total area of the construction site, and the area that will undergo disturbance, in acres. Commercial Development Non-structural and other development (i.e. parks, trails, stream realignment, bank stabilization, demolition, etc.) F) NATURE OF CONSTRUCTION ACTIVITY Check the appropriate box(es) or provide a brief description that indicates the general nature of the construction activities. (The full description of activities must be included in the Stormwater Management Plan.) Residential Development Highway and Transportation Development Pipeline and Utilities (including natural gas, electricity, water, and communications) Oil and Gas Exploration and Well Pad Development SW Construction Application for: page 4 of 5 G) ANTICIPATED CONSTRUCTION SCHEDULE Construction Start Date: Final Stabilization Date:  Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating, demolition, and grading activities.  Final Stabilization Date - in terms of permit coverage, this is when the site is finally stabilized. This means that all ground surface disturbing activities at the site have been completed, and all disturbed areas have been either built on, paved, or a uniform vegetative cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels. Permit coverage must be maintained until the site is finally stabilized. Even if you are only doing one part of the project, the estimated final stabilization date must be for the overall project. If permit coverage is still required once your part is completed, the permit certification may be transferred or reassigned to a new responsible entity(s). H) RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters) Immediate Receiving Water(s): Ultimate Receiving Water(s): Identify the receiving water of the stormwater from your site. Receiving waters are any waters of the State of Colorado. This includes all water courses, even if they are usually dry. If stormwater from the construction site enters a ditch or storm sewer system, identify that system and indicate the ultimate receiving water for the ditch or storm sewer. Note: a stormwater discharge permit does not allow a discharge into a ditch or storm sewer system without the approval of the owner/ operator of that system. I) SIGNATURE PAGE STORMWATER MANAGEMENT PLAN CERTIFICATION Ink Signature For Docusign Electronic Signature 1. You may print and sign this document and mail the hard copy to the State along with required documents (address on page one). 2. Electronic Submission Signature You may choose to submit your application electronically, along with required attachments. To do so, click the SUBMIT button below which will direct you, via e-mail , to sign the document electronically using the DocuSign Electronic Signature process. Once complete, you will receive via e-mail, an electronically stamped Adobe pdf of this application. Print the signature page from the electronically stamped pdf, sign it and mail it to the WQCD Permits Section to complete the application process (address is on page one of the application).  The Division encourages use of the electronic submission of the application and electronic signature. This method meets signature requirements as required by the State of Colorado.  The ink signed copy of the electronically stamped pdf signature page is also required to meet Federal EPA Requirements.  Processing of the application will begin with the receipt of the valid electronic signature. By checking this box “I certify under penalty of law that a complete Stormwater Management Plan, as described in the stormwater management plan guidance, has been pre-pared for my activity. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations.” Date: Signature of Legally Responsible Person or Authorized Agent (submission must include original signature) Name (printed) Title "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." “I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated with Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the certification is transferred, inactivated, or expired.” [Reg 61.4(1)(h)] DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN DO NOT INCLUDE PAYMENT—AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED. Signature: The applicant must be either the owner and operator of the construction site. Refer to Part B of the instructions for additional information. The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows: (Regulation 61.4 (1ei) a) In the case of corporations, by the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the form originates b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, (a principal executive officer has responsibility for the overall operation of the facility from which the discharge originates). SW Construction Application for: page 5 of 5 3rd Party Preparer: If this form was prepared by an authorized agent on behalf of the Permittee, please complete the field below. Preparer Name (printed) Email Address Application for COLORADO DISCHARGE PERMIT SYSTEM (CDPS) General Permits: Page 1 of 10 revised 11-2017 For Agency Use Only: Permit Number Assigned COG07 - _____________________ COG315 -_____________________ COG316 -_____________________ 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer  Construction Dewatering (COG070000)  Remediation Activities Discharging To Surface Water (COG315000), or  Remediation Activities Discharging To Groundwater (COG316000) Please print or type. Original signatures are required. Photo, faxed, pdf or email copies will not be accepted. This combined permit application is designed to streamline the application process for the three types of discharge permits listed in Part A below, and includes an Application Guidance Document to help applicants complete the application and select the right permit coverage for their activity. Please note that one application is intended to cover one project and one type of permit. Where multiple projects or types of permits are required, please submit an appropriate number of permit applications. The application must be submitted to the Water Quality Control Division at least 30 days (for Construction Dewatering ) or 45 days (for Remediation) prior to the anticipated date of discharge, and must be considered complete by the division before the review and approval process begins. The division will notify the applicant if additional information is needed to complete the application. If more space is required to answer any question, please attach additional sheets to the application form. Applications must be submitted by mail or hand delivered to: Colorado Department of Public Health and Environment Water Quality Control Division, WQCD-P-B2 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 A. PERMIT INFORMATION Reason for Application: □ NEW CERT □ RENEW CERT EXISTING CERT # Applicant is: □ Property Owner □ Contractor/Operator Application is for the following discharge permit (select ONE). See Guidance. □ Construction Dewatering (COG070000) □ Remediation Activities Discharging to Surface Water (COG315000) □ Remediation Activities Discharging to Groundwater (COG316000) Note: This application is designed for processing each of the three permit types listed above. The division may request additional characterization of the proposed discharge to ensure that the appropriate permit coverage is requested and the appropriate permit certification is issued. The division may deny or change the requested type of discharge permit after review of the submitted application and will notify the applicant of the changes. Coverage under the “Subterranean Dewatering or Well Development” General Permit COG6030000 is not available using this application form. IMPORTANT: Please read the Application Guidance Document (Guidance) for this permit application prior to completing this application. The Guidance provides specific and important instructions required for completing this application correctly. Application for construction dewatering or groundwater remediation coloradowaterpermits.com Page 2 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer B. CONTACT INFORMATION 1. Permittee Information Organization Formal Name: ___________________________________________________________ Permittee Name: the person authorized to sign and certify the permit application. This person receives all permit correspondences and is responsible for ensuring compliance with the permit. Responsible Position (Title): ______________________________________________ Currently Held By (Person): ______________________________________________ Telephone No: _________________________________ Email address: ___________________________________ Mailing Address: _______________________________________________________ City: ________________________ State: ______________ Zip: _____________ This form must be signed by the permittee to be considered complete. Per Regulation 61, in all cases, it shall be signed as follows: a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official. 2. DMR Cognizant Official (i.e. authorized agent) the person or position authorized to sign and certify reports required by permits including Discharge Monitoring Reports [DMR’s], Annual Reports, Compliance Schedule submittals, and other information requested by the division. The division will transmit pre-printed DMR’s to this person. If more than one, please add additional pages. □ Same as 1) Permittee Responsible Position (Title): ______________________________________________ Currently Held By (Person): ______________________________________________ Telephone No: _________________________________ Email address: ___________________________________ Organization: __________________________________________________________ Mailing Address: _______________________________________________________ City: ________________________ State: ______________ Zip: _____________ Per Regulation 61: All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: a) The authorization is made in writing by the permittee b) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position) c) Submitted in writing to the Division COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 3 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer B. CONTACT INFORMATION (cont.) 3. Site/Local Contact (contact for questions relating to the facility & discharge authorized by this permit.) □ Same as 1) Permittee Responsible Position (Title): ______________________________________________ Currently Held By (Person): ______________________________________________ Telephone No: __________________________________ Email address: ___________________________________ Organization: __________________________________________________________ Mailing Address: _______________________________________________________ City: ________________________ State: ______________ Zip: _____________ 4. Operator in Responsible Charge Required for Groundwater Remediation COG315000 or COG316000 □ Same as 1) Permittee □ Same as 3) Site/ Local Contact *Note: Where the division determines that coverage under the construction dewatering permit is appropriate, an ORC is not required. Operator Number __________________ Legal Name: _________________________________________________ Telephone No: _____________________Email address: ________________________________________________ Company: __________________________________________________________ 5. Billing Contact □ Same as 1) Permittee Responsible Position (Title): ______________________________________________ Currently Held By (Person): ______________________________________________ Telephone No: __________________________________ Email address: ___________________________________ Organization: __________________________________________________________ Mailing Address: _______________________________________________________ City: ________________________ State: ______________ Zip: _____________ 6. Other Contact Types (check below) Add pages if necessary: Responsible Position (Title): ______________________________________________ Currently Held By (Person): ______________________________________________ Telephone No: __________________________________ Email address: ___________________________________ Organization: __________________________________________________________ Mailing Address: _______________________________________________________ City: ________________________ State: ______________ Zip: _____________ □ Environmental Contact □ Facility Inspection Contact □ Consultant □ Compliance Contact □ Property Owner □ Other ____________________________________________________________ COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 4 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer C. PERMITTED FACILITY INFORMATION Facility or Project Name ____________________________________________________________________ Street Address (or cross streets) ______________________________________________________________ City__________________________________ Colorado, Zip Code __________ County __________________________________ Type of Facility Ownership □ City Government □ Corporation □ Private □ Municipal or Water District □ State Government □ Mixed Ownership _________________________________ Facility or Project Latitude/Longitude — List the latitude and longitude of the excavation resulting in the discharge(s). If the exact excavation location(s) are not known, list the latitude and longitude of the center point of the construction project. If using the center point, be sure to specify that it is the center point of construction activity. Latitude _____. _________ Longitude _____. _____________ Provide coordinates in decimal degrees to 6 decimal places (e.g., 39.703345°,-104.933567°) Horizontal Collection Method: □ GPS Unspecified □ Interpolation Map – Map Scale Number__________ Reference Point: □ Project/Facility Entrance □ Project/Facility Center/Centroid Horizontal Reference Datum: __________________________________ Standard Industrial Classification (SIC) Code(s) for this FACILITY (include up to 4, in order of importance) 1__________________ 2________________3_________________4_________________ Receiving Water______________________________________________________________ D. PROJECT DESCRIPTION D.1. Description of Activity: a) Provide a brief overview of the project and dewatering activity (e.g., highway, bridge and tunnel construction, storm drain expansion, etc.). b) Is the dewatering and discharge in-stream? (The dewatering operation is considered in-stream where the dewatering activity is conducted within approximately the ordinary high water mark of the stream and/or on the bank of the stream and the discharge is back to the same water body.) □ Yes * □ No *If yes, you must provide a description of how your project meets this definition in the box below. If no description is provided, the work will not be considered in-stream. Please note that in-stream work activities may also require a separate Clean Water Act Section 404 Permit and Colorado 401 Certification. COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 5 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer c) Will the project involve a temporary stream diversion (e.g. diversion channel, pump-around, piped diversion, coffer dam) to reroute water around the construction area? □ Yes * □ No *By checking yes, the applicant understands that temporary water diversions are not covered under the permit certification and may require coverage under a Clean Water Act Section 404 Permit. Only dewatering discharge outfalls associated with construction-related activities may be covered under the permit certification. d) Will dewatering be conducted in areas that involve work on (e.g. replacing, repairing, making connections to, etc...) existing sanitary sewer lines, conveyances, or vessels, or in proximity to septic disposal systems? □ Yes □ No If yes, is there the potential that sewage or septage could be in the effluent to be discharged? □ Yes □ No * *If no, you must provide a description of the control measures that will be implemented to prevent sewage or septage from entering the discharge (use the box below). The division may add effluent limits for E. coli and/or Total Coliform if the applicant does not demonstrate that adequate measures will be in place. D.2 Description of Discharge: a) Is the discharge to a ditch or storm sewer system? □ Yes* □ No *If yes, the applicant must contact the owner of the ditch or storm sewer system prior to discharging to address any local ordinances and to determine if additional requirements will be imposed by the owner. b) Is the discharge to an impoundment? □ Yes* □ No c) Discharge Frequency and Duration:  Estimated discharge start date: _______________  Estimated discharge duration: Years _________ Months ____________ Days _____________  Upon completion of construction phase dewatering, will there be long-term subterranean dewatering at the site (e.g. foundation, footer, toe drains, etc...)? □ Yes* □ No *If yes, note that construction phase dewatering and long-term subterranean dewatering cannot be covered under the same permit certification. d) Provide a brief description of the Best Management Practices (BMPs) to be used in the box below. D.3 Discharge Outfalls (Limit 20 outfalls):  Total number of defined outfalls requested: _______________  Total number of undefined outfalls requested:______________ (construction dewatering only)  Complete Table 2a (for discharges to surface water) and/or 2b (for discharges to land with percolation to groundwater) to identify your defined and undefined outfall locations. Attach additional pages as necessary. COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 6 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer Table 2a – Requested Outfalls for Discharges to Surface Water (Discharges that may reach surface water through direct discharge or through a conveyance such as a ditch or a storm sewer system) OUTFALL NUMBER1 NAME OF RECEIVING STREAM(S) (e.g., Cherry Creek, Boulder Creek, Arkansas River) ESTIMATED MAXIMUM FLOW RATE2 (gpm) DESCRIPTION OF DISCHARGE LOCATION3 (e.g., Discharge enters storm sewer located at the corner of Speer and 8th Ave. with flow to Cherry Creek) LATITUDE/LONGITUDE OF EACH DISCHARGE OUTFALL Defined Discharges to Surface Water 001-A 002-A 003-A 004-A Undefined Discharges to Surface Water (Available for construction dewatering only) (Provide estimated lat/long only for undefined outfalls) 001-AU 002-AU 003-AU 004-AU 1 Identify up to 20 defined or undefined outfalls (undefined for construction dewatering only). Use additional pages as necessary. 2 For construction dewatering the maximum flow limit will be equal to twice the estimated maximum flow rate provided in the permit application. For groundwater remediation the 30-day average flow limit will be based on the design capacity of the treatment as provided in the permit application. 3 The discharge location is the point where effluent sampling will occur. This location must be at a point after treatment and before the effluent joins or is diluted by any other waste stream, body of water, or substance. If the discharge is to a ditch or storm sewer system, include the name of the ultimate receiving waters where the ditch or storm sewer discharges. COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 7 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer Table 2b – Requested Outfalls for Discharges to Land with the Potential to Percolate to Groundwater (These discharges do not have the potential to reach surface water either directly or through a conveyance.)4 OUTFALL NUMBER1 ESTIMATED MAXIMUM FLOW RATE2 (gpm) DESCRIPTION OF DISCHARGE LOCATION3 (e.g., Discharge to a field south of project site and East of I-25) LATITUDE/LONGITUDE OF EACH DISCHARGE OUTFALL Defined Discharges to Land with Potential Percolation to Groundwater G001-A G002-A G003-A G004-A Undefined Discharges to Land with Potential Percolation to Groundwater (Available for construction dewatering only) (Provide estimated lat/long only for undefined outfalls) G001-AU G002-AU G003-AU G004-AU 1 Identify up to 20 defined or undefined outfalls (undefined for construction dewatering only). Use additional pages as necessary. 2 For construction dewatering the maximum flow limit will be equal to twice the estimated maximum rate flow rate provided in the permit application. For groundwater remediation the 30-day average flow limit will be based on the design capacity of the treatment as provided in the permit application. 3 The discharge location is the point where effluent sampling will occur. This location must be at a point after treatment and before the effluent joins or is diluted by any other waste stream, body of water, or substance. 4 For discharges of uncontaminated groundwater to land, please review and consider the applicability of the division’s Low Risk Discharge Guidance: Discharges of Uncontaminated Groundwater to Land before submitting a permit application to the division. This policy is available for download at https://www.colorado.gov/pacific/cdphe/clean-water-construction- compliance-assistance-and-guidance. COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 8 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer E. ADDITIONAL INFORMATION E.1 Nearby Sources of Potential Groundwater Contamination: a) Has the proposed dewatering area been reviewed for possible groundwater contamination, such as plumes from leaking underground storage tanks (LUSTs), hazardous waste sites, or additional sources other than what is normally encountered at excavation and construction sites? Applicants are expected to exercise due diligence in evaluating their project sites prior to applying for a discharge permit. □ Yes □ No b) Is an open LUST located within one-half mile of the site? □ Yes* □ No *If yes, BTEX analytical data for a source water sample representative of the proposed discharge at the site must be included with the permit application. Failure to include this data may result in delays in processing the permit application until such data is submitted to the Division. See Guidance. c) Is a Superfund site or National Priorities List (NLP) site located within one mile of the site? □ Yes* □ No *If yes, analytical data for all parameters shown in Table 1 of this application (or an alternate list of constituents approved by the division) for a source water sample representative of the proposed discharge must be included with the permit application. Failure to include this data may result in delays in processing the permit application until such data is submitted to the Division. See Guidance. d) Is any other (non-LUST, non-Superfund, non-NPL site) known source of contamination, such as a Voluntary Cleanup (VCUP), Environmental Covenant, open RCRA Corrective Action site, or brownfields site located within one-half mile of the site? □ Yes* □ No *If yes, analytical data for all parameters shown in Table 1 of this application (or an alternate list of constituents approved by the division) for a source water sample representative of the proposed discharge must be included with the permit application. Failure to include this data may result in delays in processing the permit application until such data is submitted to the Division. See Guidance. e) If known sources of contamination are located near the site, provide an overview of the source and nature of contamination including:  The nature of the contamination of the groundwater, alluvial water, stormwater, and/or surface water (the source water) for which treatment and/or remedial activities will occur,  The primary industrial activities which resulted in the source water contamination,  The source of the contamination (pipes, leaking underground storage tank, up gradient sources, etc.) or state “unknown.” COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 9 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer f) For contaminated discharges (remediation), provide a narrative description of the type(s) of treatment proposed for use at each identified outfall. E.2 Chemical Additions List any chemical additives or other materials to be used in the water or to treat water prior to discharge. Include the Material Safety Data Sheet (MSDS) for each chemical with the application. E.3 Site Maps and Schematics Are required maps and schematics attached? □ Yes □ No-Application cannot be processed without required maps  Location Map(s) for Outfalls – Application must include a location map(s) that shows the location of the project/facility, the limits of the construction activity, the approximate location of the requested discharge point(s)/outfalls, and the location of potential receiving water(s). If known, the map should also include the approximate location(s) where dewatering is to occur and the location of proposed BMP(s) to be used. A north arrow must be shown. Maps must be on paper that can be folded to 8 ½ x 11 inches. E.4 Associated Permits Does the applicant have a Stormwater Permit for Construction Activities? □ YES □ NO □ PENDING If Yes, Stormwater Construction Permit Number: COR-___________________ Does the applicant have a Clean Water Act Section 404 Permit? □ YES □ NO □ PENDING CHEMICAL NAME MANUFACTURER PURPOSE DOSAGE COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Page 10 of 10 revised 11-2017 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer E.5 Water Rights The State Engineers Office (SEO) has indicated that any discharge that does not return water directly to surface waters (i.e. land application, rapid infiltration basins, etc.) has the potential for material injury to a water right. As a result, the SEO needs to determine that material injury to a water right will not occur from such activities. To make this judgment, the SEO requests that a copy of all documentation demonstrating that the requirements of Colorado water law have been met, be submitted to their office for review. The submittal should be made as soon as possible to the following address: Colorado Division of Water Resources ● 1313 Sherman Street, Room 818 ● Denver, Colorado 80203 Should there be any questions on the issue of water rights; the SEO can be contacted at (303) 866-3581. It is important to understand that any CDPS permit issued by the division does not constitute a water right. Issuance of a CDPS permit does not negate the need to also have the necessary water rights in place. It is also important to understand that even if the activity has an existing CDPS permit, there is no guarantee that the proper water rights are in place. F. REQUIRED CERTIFICATION SIGNATURE [Reg 61.4(1)(h)] "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Signature (Legally Responsible Party (Page 2 item 1) _________________________________________ Date ______________________________ Name (printed) _____________________________________________Title______________________________ This form must be signed by the permittee to be considered complete. Per Regulation 61, in all cases, it shall be signed as follows: a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official. Application for construction dewatering or groundwater remediation coloradowaterpermits.com Appendix Page 1 of 2 ATTACHMENT 1 Please Submit the Laboratory Data Package for any Required Analysis with the Permit Application (See Important Table Notes) Required Water Quality Data Metals PQL (ug/l) 1 Metals PQL (ug/l) 1 Aluminum-Trec 15 Lead-PD 0.5 Antimony-Trec 2 Manganese-PD 2 Arsenic-Trec 1 Manganese-Diss 2 Arsenic-PD 1 Molybdenum-Trec 0.5 Barium-Trec 1 Nickel-Trec 1 Beryllium-Trec 2 Nickel-PD 1 Cadmium-Trec 0.5 Selenium-Trec 1 Cadmium-PD 0.5 Selenium-PD 1 Chromium III-Trec 20 Silver-Trec 0.5 Chromium III-PD 20 Silver-PD 0.5 Chromium VI-Diss 20 Thallium-Trec 0.5 Chromium-Trec 20 Thallium-PD 0.5 Copper-Trec 2 Uranium-PD 1 Copper-PD 2 Uranium-Trec 1 Iron-Trec 20 Zinc-Trec 10 Iron-Diss 20 Zinc-PD 10 Lead-Trec 0.5 Volatiles PQL (ug/l) 1 Volatiles PQL (ug/l) 1 acrolein 15 ethylbenzene 75 benzene 3 methyl bromide 5 bromoform 3 methyl chloride 4.5 carbon tetrachloride 3 1,1,2,2-tetrachloroethane 2 chlorobenzene 60 tetrachloroethylene 2.3 chlorodibromomethane 3 toluene 60 2-chloroethylvinyl ether 0.65 * 1,2-trans-dichloroethylene 0.5 * chloroform 3 1,1,1-trichloroethane 5 1,2-dichlorethane 3 1,1,2-trichloroethane 2.0 1,1-dichlorethylene 5 trichloroethylene 2.3 1,2-dichlorpropane 2 vinyl chloride 3 1,3-dichlorpropylene 2 * 1,4-Dioxane 0.15 * Semi-Volatile Organic Compounds PQL (ug/l) 1 Semi-Volatile Organic Compounds PQL (ug/l) 1 acenaphthene 20 1,2-diphenylhydrazine (as azobenzene) 5 * acenaphthylene 30 fluorene 20 anthracene 20 fluoranthene 25 benzidine 170 hexachlorobenzene 16 benzo(a)anthracene 12 hexachlorobutadiene 9 benzo(a)pyrene 20 hexachlorcyclopentadiene 50 benzo(b)fluoranthene 35 hexachloroethane 16 benzo(ghi)perylene 20 indeno(1,2,3-cd)pyrene 20 benzo(k)fluoranthene 25 isophorone 25 bis(2-chloroethyl)ether (or Dichloroethyl ether) 15 naphthalene 20 bis(2-chloroisopropyl)ether (or 2,2-dichloroisopropyl ether) 60 nitrobenzene 19 bis(2-ethylhexyl)phthalate 25 N-nitrosodimethylamine 30 COG070000/COG315000/COG316000 Permit Application www.coloradowaterpermits.com Appendix Page 2 of 2 Semi-Volatile Organic Compounds PQL (ug/l) 1 Semi-Volatile Organic Compounds PQL (ug/l) 1 Butyl benzyl phthalate 25 N-nitrosodi-n-propylamine 30 2-chloronaphthalene 20 N-nitrosodiphenylamine 19 chrysene 18 pyrene 10 dibenzo(a,h)anthracene 20 1,2,4-trichlorobenzene 20 1,2-dichlorobenzene 2.5 2-chlorophenol 35 1,3-dichlorobenzene 2.5 2,4-dichlorophenol 30 1,4-dichlorobenzene 3.5 2,4,-dimethylphenol 30 3,3-dichlorobenzidine 18 4,6-dinitro-o-cresol 17 diethyl phthalate 20 2,4-dinitrophenol 100 dimethyl phthalate 20 4-nitrophenol 25 di-n-butyl phthalate 25 pentachorophenol 36 2,4-dinitrotoluene 17 phenol 15 2,6-dinitrotoluene 20 2,4,6-trichlorophenol 25 xylene 10 * 1,4-Dioxane 0.15 * 1 PQLs are as listed in the division’s Practical Quantitation Limits Policy (CW 6) unless noted otherwise. * This is a recommended PQL based on EPA approved methods. The division’s Practical Quantitation Limits Policy (CW 6) does not provide a 40 CFR 136 based PQL for this parameter. Trec = Total Recoverable PD = Potentially Dissolved Diss = Dissolved PQL = Practical Quantitation Limit Important table notes: 1) Please refer to the permit application Guidance to determine whether analytical data is required with the permit application, and if so, what specific type of data is required. 2) Parameter names match the names as they appear in the general permit or, as italicized, as they appear in the division’s Practical Quantitation Limits Policy (CW-6). 3) The division may require analytical data for additional parameters where the project site is located in close proximity to potential sources of contamination for parameters not included in this Attachment 1, including but not limited to pesticide, PCB, radionuclide contamination. 4) Applicants applying under the General Permit for Remediation Activities Discharging to Groundwater (COG316000) are encouraged to contact the division prior to sample collection to ensure that the correct metal speciation is included in the sample analysis. 5) For the permit application, all sampling should be performed according to specified methods in 40 CFR 136, methods approved by EPA pursuant to 40 CFR 136, or methods approved by the division, in the absence of a method specified in or approved pursuant to 40 CFR 136. In addition, the PQLs listed in Attachment 1 should be met unless otherwise approved by the division. For Agency Use Only Permit Number Assigned COR03-______________ Date Received ____/____/____ Month Day Year NOTICE OF REASSIGNMENT OF PERMIT COVERAGE AND GENERAL PERMIT APPLICATION STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED. Please print or type. Original signatures are required. This application must be considered complete by the Division prior to initiation of permit processing. The Division will notify the applicant if additional information is needed to complete the application. If more space is required to answer any question, please attach additional sheets to the application form. Applications must be mailed or delivered to: Colorado Department of Public Health and Environment Water Quality Control Division 4300 Cherry Creek Drive South WQCD-P-B2 Denver, Colorado 80246-1530 **Part I of the application beginning below is to be filled out by the new permit applicant that will be assuming permitting liability for the reassigned portion of the original applicant’s site. **Part II of the application, starting on page 3 of the form, is to be completed by the current permittee. Both Parts I (pages 1-4) and II (page 5) must be completed. EXISTING CERT **__________________ (from Part II) ** NOTE: THIS WILL CREATE A NEW PERMIT FOR PART 1 APPLICANT. THE EXISTING PERMIT WILL NOT BE TERMINATED. THIS IS NOT A TRANSFER FORM. PART I - To be completed by the New permit applicant: I hereby accept the reassignment of permit coverage for the area described in this application. I have reviewed the terms and conditions of this permit and the Stormwater Management Plan and accept full responsibility, coverage and liability REASSIGNMENT WILL BE EFFECTIVE _____________________________ MONTH/ DAY/ YEAR Applicant is : Property Owner Contractor/Operator A. CONTACT INFORMATION - NOT ALL CONTACT TYPES MAY APPLY * indicates required *PERMITTEE (If more than one please add additional pages) *ORGANIZATION FORMAL NAME: 1) *PERMITTEE the person authorized to sign and certify the permit application. This person receives all permit correspondences and is legally responsible for compliance with the permit. Responsible Position (Title): ___________________________________________ Currently Held By Person):___________________________________________________________ Telephone No:__________________________________ email address__________________________________ Organization: Mailing Address: City:_ State: Zip: This form must be signed by the Permittee to be considered complete. Per Regulation 61 In all cases, it shall be signed as follows: a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official Application Part 1 page 1of 4 updated 4/2011 2) DMR COGNIZANT OFFICIAL (i.e. authorized agent) the person or position authorized to sign and certify reports required by the Division including Discharge Monitoring Reports *DMR’s, Annual Reports, Compliance Schedule submittals, and other information requested by the Division. The Division will transmit pre-printed reports (ie. DMR’s) to this person. If more than one, please add additional pages. Same As 1) Permittee Responsible Position (Title):____________________________________________________ Currently Held By (Person):__________________________________________________ Telephone No:_______________________________ email address____________________________________ Organization:_______________________________________________________________ Mailing Address: ____________________________________________________________ City:_ State: Zip: _______________________ Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: (i) The authorization is made in writing by the permittee (ii) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and (iii) The written authorization is submitted to the Division 3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit for the facility. Same As 1) Permittee Responsible Position (Title):____________________________________________________ Currently Held By (Person):__________________________________________________ Telephone No:_______________________________ email address____________________________________ Organization:_______________________________________________________________ Mailing Address: ____________________________________________________________ City:_ State: Zip: _______________________ 4) * BILLING CONTACT if different than the permittee Responsible Position (Title):____________________________________________________ Currently Held By (Person):__________________________________________________ Telephone No:_______________________________ email address____________________________________ Organization:_______________________________________________________________ Mailing Address: ____________________________________________________________ City:_ State: Zip: _______________________ 5) OTHER (Please describe)_____________________________________________________ Responsible Position (Title):____________________________________________________ Currently Held By (Person):__________________________________________________ Telephone No:_______________________________ email address____________________________________ Organization:_______________________________________________________________ Mailing Address: ____________________________________________________________ City:_ State: Zip: _______________________ Application Part 1 page 2 of 4 updated 4/2011 B. Permitted Project/Facility Information Project/Facility Name Street Address or cross streets City, Zip Code County Facility Latitude/Longitude— (approximate center of site to nearest 15 seconds using one of following formats 001A Latitude . Longitude . (e.g., 39.703°, 104.933°’) degrees (to 3 decimal places) degrees (to 3 decimal places) or 001A Latitude º ’ " Longitude º ’ " (e.g., 39°46'11"N, 104°53'11"W) degrees minutes seconds degrees minutes seconds C. MAP (Attachment) Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be disturbed. Maps must be no larger than 11x17 inches. D. LEGAL DESCRIPTION Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply Township/Range/Section or metes and bounds description of site) Subdivision(s): Lot(s): Block(s): OR □ Not applicable (site has not been subdivided) E. AREA OF CONSTRUCTION SITE Total area of project site (acres): Area of project site to undergo disturbance (acres): Total disturbed area of Larger Common Plan of Development or Sale, if applicable: (i.e., total, including all phases, filings, lots, and infrastructure not covered by this application) F. NATURE OF CONSTRUCTION ACTIVITY Check the appropriate box(s) or provide a brief description that indicates the general nature of the construction activities. (The full description of activities must be included in the Stormwater Management Plan.) □ Single Family Residential Development □ Multi-Family Residential Development □ 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: G. ANTICIPATED CONSTRUCTION SCHEDULE Construction Start Date: Final Stabilization Date: Application Part 1 page 3 of 4 updated 4/2011 NOTICE OF REASSIGNMENT OF PERMIT COVERAGE AND GENERAL PERMIT APPLICATION STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES Application Part 1 page 4 of 4 updated 4/2011 H. RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters) Immediate Receiving Water(s): Ultimate Receiving Water(s): I. REQUIRED SIGNATURES (Both parts i. and ii. must be signed) Signature of Applicant: The applicant must be either the owner and/or operator of the construction site. Refer to Part B of the instructions for additional information. The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows: a) In the case of corporations, by a principal executive officer of at least the level of vice-president or his or her duly authorized representative, if such representative is responsible for the overall operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, or other duly authorized employee if such representative is responsible for the overall operation of the facility from which the discharge described in the form originates. STOP!:A Stormwater Management Plan must be completed prior to signing the following certifications! i. Stormwater Management Plan Certification “I certify under penalty of law that a complete Stormwater Management Plan, as described in Appendix A of this application, has been prepared for my activity. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations.” XX Signature of Legally Responsible Person or Authorized Agent (submission must include original signature) Date Signed Name (printed) Title ii. Signature of Permit Legal Contact “I certify under penalty of law that I have personally examined and am familiar with the information submitted in this application and all attachments and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine or imprisonment. “I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated with Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the certification is transferred, inactivated, or expired.” XX Signature of Legally Responsible Person (submission must include original signature) Date Signed Name (printed Title DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN DO NOT INCLUDE PAYMENT – AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED. NOTICE OF REASSIGNMENT OF PERMIT COVERAGE AND GENERAL PERMIT APPLICATION STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES Application Part 2 page 1 of 1 updated 4/2011 PART II - AMENDMENT TO THE CURRENT PERMIT CERTIFICATION TO BE COMPLETED BY CURRENT PERMITTEE CERTIFICATION NUMBER COR03________________ THIS PERMIT WILL NOT BE TERMINATED II.A. CURRENT PERMIT LEGAL CONTACT INFORMATION Check if information has changed Company Name: Legally Responsible Person: First Name: Last Name: Title: Mailing Address: City, State and Zip Code: Phone: Email Address: 2. PERMITTED FACILITY INFORMATION Name of Plan, Project or Development: Latitude and Longitude (approximate center of site to nearest 15 seconds using one of following formats): Latitude: Longitude: (e.g., 39°42’11’’, 104°55’57’’) degrees /minutes/ seconds OR degrees/ minutes/ seconds Latitude: Longitude: (e.g., 39.703°, 104.933’) degrees (to 3 decimal places) degrees (to 3 decimal places) 3. MAP (Attachment) Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be retained under this current certification. Maps must be no larger than 11x17 inches. 4. NATURE OF CONSTRUCTION ACTIVITY Check the appropriate box(s) or provide a brief description that indicates the general nature of the construction activities. (The full description of activities must be included in the Stormwater Management Plan.) □ Single Family Residential Development □ Multi-Family Residential Development □ Commercial Development □ Other, Describe: 9. REQUIRED SIGNATURES Certification for Reassignment “I certify under penalty of law that I have personally examined and am familiar with the information submitted in Part II of this application and all attachments in reference to Part II and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate and complete. I am aware that thereare significant penalties for submitting false information, including the possibility of fine or imprisonment. “As the permittee currently covered by the above-referenced certification, I hereby agree to reassign the permit coverage for the area and activity described in Items I.b. and I.c., and all responsibilities thereof, from the above-referenced permit certification to the new permittee listed in Part I of this form.” Signature of Legally Responsible Person (submission must include original ink signature) Date Signed Name (printed) Title Page 1 of 3 Dec 2014 FOR DIVIISION USE ONLY Effective date____________________ COLORADO WATER QUALITY CONTROL DIVISION TERMINATION APPLICATION Print or type all information. Mail original form with ink signature to the following address. Emailed and Faxed forms will not be accepted. All items must be filled out completely and correctly. If the form is not complete, you will be asked to resubmit it. Colorado Dept of Public Health and Environment Water Quality Control Division WQCD-P-B2 4300 Cherry Creek Drive South Denver CO 80246-1530 PART A. IDENTIFICATION OF PERMIT OR AUTHORIZATION - Please limit submission to one permit, certification, or authorization per form. All permit termination dates are effective on the date approved by the division. Processing times vary by type of discharge. Some discharge types require onsite inspections to verify information in this application. PERMIT, CERTIFICATION, OR AUTHORIZATION NUMBER (DOES NOT END IN 0000)____________________ PART B. PERMITTEE INFORMATION Company Name______________________________________________________________________________ Legal Contact First Name____________________________Last Name_________________________________ Title________________________________ Mailing Address______________________________________________________________________________ City __________________________________State_______________Zip Code__________________________ Phone____________________________Email address______________________________________________ PART C. FACILITY OR PROJECT INFORMATION Facility/Project name________________________________________________________________________ Location/Address ___________________________________________________________________________ City __________________________________________County_______________________________________ Local contact name________________________________________Title______________________________ Phone___________________________ Email address_______________________________________________ PART D. TERMINATION INFORMATION QUESTIONS Provide information for Part D that applies to your facility and termination request. Not all questions need to be answered- only the part that applies to your facility. Part D1 covers facilities no longer in operation. Part D2 covers mining facilities no longer in operation Part D3 covers facilities in operation but no longer discharging or needing permit coverage. Part D4 covers Stormwater Construction facilities where construction is complete and the site is stabilized. **Please answer questions as completely as possible to assist in timely approval of this termination request.** D1. FACILITY IS NO LONGER IN OPERATION AT THIS LOCATION All activities and discharges at the identified site have ceased; all potential pollutant sources have been removed; all industrial wastes have been disposed of properly; all DMR’s, Annual Reports, and other reports have been submitted; and all elements of a Stormwater Management Plan have been completed (if this applies). **FOR LAGOONS: please reference “information regarding Domestic Treatment Works Closure at Wastewater Treatment Facilities” COLORADO WATER QUALITY CONTROL DIVISION TERMINATION APPLICATION www.coloradowaterpermits.com Page 2 of 3 Dec 2014 D2. MINING FACILITY IS NO LONGER IN OPERATION AT THIS LOCATION. Sand and Gravel, Coal or Hard Rock Mining A. Mining operation is no longer discharging process/treated water. Bond has not been released by DRMS. A stormwater only permit is requested at this time. Attach application for Stormwater Only permit. B. Reclamation of mining site is completed. Bond has been released by DRMS. ___ YES Attach a copy of the Bond release letter. ___NO Explain below: C. Reclamation of mining site is complete. Is there any continued mine drainage? Eg. Adits or unreclaimed waste piles? ___ YES , Please explain, attach additional pages as necessary. D3. FACILITY IS STILL IN OPERATION BUT IS NO LONGER DISCHARGING OR NO LONGER NEEDS A PERMIT A. Facility continues to operate, however the activity producing the discharge has ceased (including changes in SIC Code resulting in change in duty to apply). B. Termination is based on alternate disposal of discharges (discharge is being disposed of in another way) a. Solid waste disposal unit (e.g. evaporative ponds) b. No Exposure Exclusion (for industrial stormwater facilities only.) NOX Number_________________ c. Combined with another authorized discharge. Permit Number ____________________ d. Permit is not required (includes coverage by low risk policy, etc.) – please explain, attach additional pages if necessary C. PERMITTEE IS NO LONGER THE OWNER/OPERATOR OF THE SITE and all efforts have been made to transfer the permit to appropriate parties. Please attach copies of registered mail receipts, letters, etc. D4. STORMWATER CONSTRUCTION FACILITIES WHERE CONSTRUCTION IS COMPLETE (Select A, B, or C) A. SITE IS FINALLY STABILIZED OR CONSTRUCTION WAS NOT STARTED a. The permitted activities meet the requirements for FINAL stabilization in accordance with the permit, the Stormwater Management Plan, and as described in item b. (explanation can be construction activities were not started). b. Describe the methods used to meet final stabilization. (Required) *Final Stabilization defined on page 3 COLORADO WATER QUALITY CONTROL DIVISION TERMINATION APPLICATION www.coloradowaterpermits.com Page 3 of 3 Dec 2014 D4. STORMWATER CONSTRUCTION FACILITIES WHERE CONSTRUCTION IS COMPLETE (Continued) B. ALTERNATIVE PERMIT COVERAGE OR FULL REASSIGNMENT a. All ongoing construction activities including all disturbed areas, covered under the permit certification listed in Part B have coverage under a separate CDPS Stomwater Construction permit. The Division’s Reassignment form was used by the permittee to reassign all areas and activities. b. Permit certification number covering the ongoing activities (Required)_____________________ C. PERMITTEE IS NO LONGER THE OWNER OR OPERATOR OF THE FACILITY All efforts have been made to transfer the permit to appropriate parties. Please attach copies of registered mail receipt, letters, etc. *Final stabilization is reached when: all ground surface disturbing activities at the site have been completed including removal of all temporary erosion and sediment control measure, and uniform vegetative cover has been established with an individual plant density of at least 70 percent of predisturbance levels, or equivalent permanent, physical erosion reduction methods have been employed. PART E. CERTIFICATION SIGNATURE REQUIRED FOR ALL TERMINATION REQUESTS I certify under penalty of law that this document and all attachments were prepared under my direction and/or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those individuals immediately responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. “ (See 18 USC 1001 and 33 USC 1319) I certify that I am the legal representative of the above named company (PART B page 1). Applies to Stormwater Construction terminations: I understand that by submitting this notice of termination, I am no longer authorized to discharge stormwater associated with construction activity by the general permit. I understand that discharging pollutants in stormwater associated with construction activities to the waters of the State of Colorado, where such discharges are not authorized by a CDPS permit, is unlawful under the Colorado Water Quality Control Act and the Clean Water Act. Signature of Legally Responsible Party Date Signed Name (printed) Title Signatory requirements: This termination request shall be signed, dated, and certified for accuracy by the permittee in accord with the following criteria: 1. In the case of a corporation, by a principal executive officer of at least the level of vice-president, or his or her duly authorized representative, if such representative is responsible for the overall operation of the operation from which the discharge described herein originates; 2. In the case of a partnership, by a general partner; 3. In the case of a sole proprietorship, by the proprietor; 4. In the case of a municipal, state, or other public operation, by either a principal executive officer, ranking elected official, or other duly authorized employee. APPENDIX B Erosion and Sediment Control Inspection List (ESCIL) No. 1 2 3 4 5 6 7 Yes No Yes No Yes No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Inspector (Signature)____________________________(Printed)________________________________________ Agency: __________________________________________________________Date: _______________________ Other Other Check Dams/Dikes Concrete Washout Diversion Swale/Berm Erosion Control Blankets Good Housekeeping Inlet Protection Material/Equipment Storage Vehicle Tracking Control Pad Sediment Trap/Basin Seed/Crimp/Mulch/Sod Silt Fence Wattles Slope Protection/Terracing Staging Area Street Sweeping Surface Roughening Grading Excavation Utility Construction Foundations Outfall Protection BMPs Practice Used To Be Constructed Requires Comments (If needed, use Page 2 for additional comments and notes) Structural Work APPENDIX C • Permit Map • Drainage Plan (Map Pocket) • Sediment and Erosion Control Plans (Map Pocket) • Erosion Control Details (Map Pocket) • SWMP Site Plan – Blank Version (Map Pocket) S S S S CC CC CC CC CC CC CC CC CC LIMITS OF PROJECT (14.6 ACRES) 3405 SOUTH TIMBERLINE ROAD UNION PACIFIC RAILROAD EAST HORSETOOTH ROAD SOUTH TIMBERLINE ROAD DANFIELD COURT PLATTE RIVER POWER AUTHORITY NORTH 0' 200' 400' SCALE: 1" = 200' 100' PATH: P:\U16014 - PRPA CAMPUS\CADD\SWMP\01_PERMIT MAP.DWG DRAWING NAME: 01_PERMIT MAP SHEET SIZE: 8.5 x 11 PLATTE RIVER POWER AUTHORITY HQ CDPHE DISCHARGE PERMIT MAP JOB NUMBER: U16014 NOTE: THIS MAP WAS PREPARED FOR INFORMATION ONLY AND THE ENGINEER PREPARING THESE PLANS WILL NOT BE RESPONSIBLE FOR UNAUTHORIZED USE OF THEM. DATE: February 9, 2018 PREPARED FOR: PLATTE RIVER POWER AUTH. 1501 ACADEMY COURT, SUITE 203 FORT COLLINS, CO 80524 (970) 530-4044 WWW.UNITEDCIVIL.COM SHEET 1 OF 1 UNITED CIVIL Design Group LLC SOUTHEAST CORNER S30, T.7N., R68W 50' RIGHT-OF-WAY R.O.W. WIDTH VARIES 60' RIGHT-OF-WAY 107.5' RIGHT-OF-WAY 50' RIGHT-OF-WAY R.O.W. WIDTH VARIES A1 C1 OS1 OS2a OS3 OS4 OS2b A2 A3 A13 B1 B2 A5 A4 A6 A7 A9 A10 A11 A8 0.42 1.35 3.49 1.23 0.68 0.21 0.93 0.37 0.26 0.91 0.42 1.45 0.40 0.57 A12 0.41 0.68 0.64 0.32 0.97 0.21 0.54 OS5 DETENTION POND A1 DETENTION POND A1 POND OUTLET STRUCTURE POND OUTLET STRUCTURE EAST HORSETOOTH ROAD SOUTH TIMBERLINE ROAD DANFIELD COURT UNION PACIFIC RAILROAD OFFSITE PROPERTY OWNED BY: 107.5' RIGHT-OF-WAY R.O.W. WIDTH VARIES R.O.W. WIDTH VARIES TEMPORARY STORM SEWER WITH PHASE1 IMPROVEMENTS PROPOSED STORM LINE 1 (SEE SHEET C4.30) EXISTING BUILDING TO REMAIN UNTIL PHASE 2 DEMOLITION PROPOSED ROOF DRAIN (SEE SHEET C4.41) PROPOSED ROOF DRAIN (SEE SHEET C4.41) UNDERGROUND DETENTION AREA EAST HORSETOOTH ROAD SOUTH TIMBERLINE ROAD HQ BUILDING MICROWAVE BUILDING PROPOSED POND EXISTING HEADQUARTERS COORDINATE ALL EROSION CONTROL MEASURES TO PROTECT OFFSITE PROPERTY WITH OFFSITE PROPERTY OWNER PROPOSED OUTLET STRUCTURE PROPOSED POND OUTLET COVER GRATE W/ PLYWOOD UNTIL POND IS FILLED PROPOSED STORM LINE 5 (SEE SHEET C4.36) PROPOSED ROOF DRAIN (SEE SHEET C4.40) EMERGENCY OVERFLOW SPILLWAY ELEV = 4952.25 APPROXIMATE EXISTING IRRIGATION PIPE TOP OF POND ELEV = 4953.25 POND EMERGENCY OVERFLOW SPILLWAY ELEV = 4955.5 PROPOSED STORM LINE 3 (SEE SHEET C4.32) END CONSTRUCTION FENCE AT EXISTING CHAIN LINK FENCE SILT FENCE TO PROTECT POND UNTIL COMPLETION OF LANDSCAPING PROPOSED STORM LINE 4 (SEE SHEET C4.35) APPROXIMATE PHASE 2 GRADING LIMITS LIMITS OF DISTURBANCE GRADE BREAK PROPOSED POND 50' RIGHT-OF-WAY 107.5' RIGHT-OF-WAY PROPOSED ROOF DRAIN (SEE SHEET C4.41) PROPOSED ROOF DRAIN (SEE SHEET C4.42) PROPOSED ROOF DRAIN (SEE SHEET C4.41) UNDERGROUND DETENTION AREA EAST HORSETOOTH ROAD HQ BUILDING MICROWAVE BUILDING POOL CAR WAREHOUSE EXISTING E&O BUILDING SWALE GRADE BREAK COORDINATE ALL EROSION CONTROL MEASURES TO PROTECT OFFSITE PROPERTY WITH OFFSITE PROPERTY OWNER EAST HORSETOOTH ROAD PROPOSED ROOF DRAIN (SEE SHEET C4.40) PROPOSED STORM LINE 5 (SEE SHEET C4.36) PROPOSED STORM LINE 3 (SEE SHEET C4.32) PROPOSED STORM LINE 2 (SEE SHEET C4.31) PROPOSED ROOF DRAIN (SEE SHEET C4.42) END CONSTRUCTION FENCE AT EXISTING CHAIN LINK FENCE SILT FENCE TO PROTECT BIOSWALE UNTIL COMPLETION OF LANDSCAPING APPROXIMATE PHASE 2 GRADING LIMITS SILT FENCE TO PROTECT POND UNTIL COMPLETION OF LANDSCAPING EXISTING BUILDING TO REMAIN UNTIL PHASE 2 DEMOLITION GRADE BREAK BIOSWALE (SEE NOTE 5) PLACE ROCK SOCK AT EACH CURB CUT LOCATION TO BIOSWALE (ALSO SEE NOTE 5) APPROXIMATE PHASE 2 GRADING LIMITS (SEE SHEET C5.21) REFER TO NOTE 6 FOR WORK WITHIN THE ROW TEMPORARY ACCESS PLACE COBBLE PAD AT DOWNSTREAM END OF EACH CURB CUT 60' RIGHT-OF-WAY PROPOSED STORM LINE 3 (SEE SHEET C4.33) DANFIELD COURT OFFSITE PROPERTY OWNED BY: 2001 DANFIELD LLC MICROWAVE BUILDING MAINTENANCE SHOP / TRUCK WASH WAREHOUSE SUBSTATION GARAGE FLEET PARKING GARAGE A FLEET PARKING GARAGE B SWALE COORDINATE ALL EROSION CONTROL MEASURES TO PROTECT OFFSITE PROPERTY WITH OFFSITE PROPERTY OWNER GRADE BREAK VTC TO BE PLACED WHILE DRIVE IS UNPAVED. PUBLIC RIGHT-OF-WAY (AND PRIVATE DRIVE ONCE PAVED) SHALL BE SWEPT DAILY OR AS NECESSARY TO PREVENT SEDIMENT TRANSPORTATION TO OFFSITE ROADWAYS OR STORM SEWER. OFFSITE STORM SEWER EXISTING INLET EXISTING INLET EXISTING INLET PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:38:18 PM P:\U16014 - PRPA CAMPUS\CADD\CP\CX.XX_DETAILED EC PLANS.DWG CX.XX_DETAILED EC PLANS ## ## C5.12 73 EROSION CONTROL PLANS - PHASE 1 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: 107.5' RIGHT-OF-WAY R.O.W. WIDTH VARIES R.O.W. WIDTH VARIES PROPOSED ROOF DRAIN (SEE SHEET C4.41) PROPOSED ROOF DRAIN (SEE SHEET C4.41) UNDERGROUND DETENTION AREA EAST HORSETOOTH ROAD SOUTH TIMBERLINE ROAD HQ BUILDING MICROWAVE BUILDING PROPOSED POND PROPOSED ROOF DRAIN (SEE SHEET C4.40) PROPOSED STORM LINE 3 (SEE SHEET C4.32) PROPOSED STORM LINE 5 (SEE SHEET C4.36) APPROXIMATE EXISTING IRRIGATION PIPE PROPOSED POND OUTLET POND EMERGENCY OVERFLOW SPILLWAY ELEV = 4955.5 LIMITS OF DISTURBANCE PROPOSED STORM LINE 4 (SEE SHEET C4.35) EMERGENCY OVERFLOW SPILLWAY ELEV = 4952.25 END CONSTRUCTION FENCE AT EXISTING CHAIN LINK FENCE TOP OF POND ELEV = 4953.25 PROPOSED STORM LINE 1 (SEE SHEET C4.30) PROPOSED OUTLET STRUCTURE GRADE BREAK PROPOSED POND (SEE NOTE 4) GRADE BREAK EXISTING BIOSWALE EXISTING CURB CUT EXISTING CURB CUT APPROXIMATE PHASE 2 GRADING LIMITS (SEE SHEET C5.20) COBBLE PAD 5' IN LENGTH PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:38:25 PM 50' RIGHT-OF-WAY 107.5' RIGHT-OF-WAY PROPOSED ROOF DRAIN (SEE SHEET C4.41) BIOSWALE (TYP.) PROPOSED ROOF DRAIN (SEE SHEET C4.41) UNDERGROUND DETENTION AREA EAST HORSETOOTH ROAD HQ BUILDING MICROWAVE BUILDING POOL CAR WAREHOUSE MONUMENT SIGN/ SCREEN WALL SWALE GRADE BREAK EAST HORSETOOTH ROAD PROPOSED ROOF DRAIN (SEE SHEET C4.40) PROPOSED STORM LINE 5 (SEE SHEET C4.36) PROPOSED STORM LINE 3 (SEE SHEET C4.32) PROPOSED STORM LINE 2 (SEE SHEET C4.31) PROPOSED ROOF DRAIN (SEE SHEET C4.42) END CONSTRUCTION FENCE AT EXISTING CHAIN LINK FENCE POTENTIAL FILL AREA (SEE SHEET C5.21) GRADE BREAK GRADE BREAK APPROXIMATE PHASE 2 GRADING LIMITS (SEE SHEET C5.21) COBBLE PAD 5' IN LENGTH PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:38:30 PM P:\U16014 - PRPA CAMPUS\CADD\CP\CX.XX_DETAILED EC PLANS.DWG CX.XX_DETAILED EC PLANS ## ## C5.31 73 EROSION CONTROL PLANS - PHASE 2 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = ##' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ 2/9/2018 4:40:57 PM P:\U16014 - PRPA CAMPUS\CADD\CP\C7.00_CONSTRUCTION DETAILS.DWG C7.00_CONSTRUCTION DETAILS ## ## C7.40 73 EROSION CONTROL CONSTRUCTION DETAILS PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: APPROVED: DATE: DRAWN BY: 12/27/00 NBJ FLOW APPROVED: DATE: DRAWN BY: NBJ 11-29-2000 APPROVED: PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = ##' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ 2/9/2018 4:41:01 PM P:\U16014 - PRPA CAMPUS\CADD\CP\C7.00_CONSTRUCTION DETAILS.DWG C7.00_CONSTRUCTION DETAILS ## ## C7.41 73 EROSION CONTROL CONSTRUCTION DETAILS PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: CWA VEHICLE CONTROL TRACKING PAD NOT TO SCALE CONCRETE WASHOUT AREA NOT TO SCALE 1 C7.41 2 C7.42 VTC SURFACE ROUGHENING 107.5' RIGHT-OF-WAY R.O.W. WIDTH VARIES R.O.W. WIDTH VARIES TEMPORARY STORM SEWER WITH PHASE1 IMPROVEMENTS PROPOSED STORM LINE 1 (SEE SHEET C4.30) EXISTING BUILDING TO REMAIN UNTIL PHASE 2 DEMOLITION PROPOSED ROOF DRAIN (SEE SHEET C4.41) PROPOSED ROOF DRAIN (SEE SHEET C4.41) UNDERGROUND DETENTION AREA EAST HORSETOOTH ROAD SOUTH TIMBERLINE ROAD HQ BUILDING MICROWAVE BUILDING PROPOSED POND EXISTING HEADQUARTERS PROPOSED OUTLET STRUCTURE PROPOSED POND OUTLET COVER GRATE W/ PLYWOOD UNTIL POND IS FILLED PROPOSED STORM LINE 5 (SEE SHEET C4.36) PROPOSED ROOF DRAIN (SEE SHEET C4.40) EMERGENCY OVERFLOW SPILLWAY ELEV = 4952.25 APPROXIMATE EXISTING IRRIGATION PIPE TOP OF POND ELEV = 4953.25 POND EMERGENCY OVERFLOW SPILLWAY ELEV = 4955.5 PROPOSED STORM LINE 3 (SEE SHEET C4.32) PROPOSED STORM LINE 4 (SEE SHEET C4.35) APPROXIMATE PHASE 2 GRADING LIMITS LIMITS OF DISTURBANCE GRADE BREAK GRADE BREAK EXISTING BIOSWALE EXISTING CURB CUT EXISTING CURB CUT APPROXIMATE PHASE 2 GRADING LIMITS (SEE SHEET C5.20) PROPOSED POND 50' RIGHT-OF-WAY 107.5' RIGHT-OF-WAY PROPOSED ROOF DRAIN (SEE SHEET C4.41) PROPOSED ROOF DRAIN (SEE SHEET C4.42) PROPOSED ROOF DRAIN (SEE SHEET C4.41) UNDERGROUND DETENTION AREA EAST HORSETOOTH ROAD HQ BUILDING MICROWAVE BUILDING POOL CAR WAREHOUSE EXISTING E&O BUILDING SWALE GRADE BREAK EAST HORSETOOTH ROAD PROPOSED ROOF DRAIN (SEE SHEET C4.40) PROPOSED STORM LINE 5 (SEE SHEET C4.36) PROPOSED STORM LINE 3 (SEE SHEET C4.32) PROPOSED STORM LINE 2 (SEE SHEET C4.31) PROPOSED ROOF DRAIN (SEE SHEET C4.42) END CONSTRUCTION FENCE AT EXISTING CHAIN LINK FENCE APPROXIMATE PHASE 2 GRADING LIMITS EXISTING BUILDING TO REMAIN UNTIL PHASE 2 DEMOLITION GRADE BREAK APPROXIMATE PHASE 2 GRADING LIMITS (SEE SHEET C5.21) TEMPORARY ACCESS PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:36:01 PM P:\U16014 - PRPA CAMPUS\CADD\SWMP\SWMP-BLANK.DWG SWMP-BLANK ## ## 2 3 SWMP SITE PLAN (BLANK VERSION) 0 30' 60' SCALE: 1" = 30' 15' 60' RIGHT-OF-WAY PROPOSED STORM LINE 3 (SEE SHEET C4.33) DANFIELD COURT OFFSITE PROPERTY OWNED BY: 2001 DANFIELD LLC MICROWAVE BUILDING MAINTENANCE SHOP / TRUCK WASH WAREHOUSE SUBSTATION GARAGE FLEET PARKING GARAGE A FLEET PARKING GARAGE B SWALE GRADE BREAK OFFSITE STORM SEWER EXISTING INLET EXISTING INLET EXISTING INLET PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:36:06 PM P:\U16014 - PRPA CAMPUS\CADD\SWMP\SWMP-BLANK.DWG SWMP-BLANK ## ## 3 3 SWMP SITE PLAN (BLANK VERSION) 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING (SEE NOTE 4) PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:35:55 PM P:\U16014 - PRPA CAMPUS\CADD\SWMP\SWMP-BLANK.DWG SWMP-BLANK ## ## 1 3 SWMP SITE PLAN (BLANK VERSION) 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING NOT TO SCALE 3 C7.41 DANDY CURB BAG TM OVERFLOW GAP CURB AND GUTTER INLET CURB FILTER LOW PROFILE WITH GUTTER FOR SAFETY AND CURB APPEAL LIFTING STRAPS STORM SEWER GRATE COMPLETELY COVERED BY HI-FLOW FABRIC DANDY BAG VELCRO CLOSURE LIFT STRAPS USED FOR EASY MOVEMENT AND INSPECTION OF UNIT STORM SEWER GRATE DANDY BAGR STORM SEWER GRATE R DANDY CURB TM MANHOLE CURB OPENING WITHOUT GRATE CURB FILTER OVERFLOW GAP AGGREGATE POUCH INLET FILTER DETAILS NOT TO SCALE STABILIZED STAGING AREA DETAIL NOT TO SCALE COMBINATION INLET FILTER - DP1 TYPE R INLET FILTER - DP2 AREA INLET FILTER - DP3 NOTES: 1. INLET FILTERS SHALL BE DANDY PRODUCTS AS SHOWN OR APPROVED EQUAL. PLAN VIEW REFERS TO DANDY PRODUCTS AS "DP-#" AS DESIGNATED ON THIS DETAIL. 4 C7.41 5 C7.41 DATE: DRAWN BY: 01/03/01 NBJ SEDIMENT CONTROL LOG INSTALLATION DETAIL NOT TO SCALE 2 C7.40 ROCK SOCK DETAIL NOT TO SCALE 1 C7.40 CURB AND GUTTER BACKFILL/COMPACT OPENINGS W/ 3 8" GRAVEL COMPACTED SUBGRADE 2' 3' VARIES (SEE NOTE 2) 9" COBBLE PAD 2' CURB CUT NOT TO SCALE 3 COBBLE PAD DETAIL C7.40 PLAN SECTION A SECTION B TIE TO DOWNSTREAM COBBLE CHANNEL OR BIOSWALE A A B B NOTES: 1. COBBLE TO MATCH TYPE AS SHOWN ON THE APPROVED LANDSCAPE PLANS. 2. LENGTH OF PAD SHALL BE 3' FOR ALL PADS INTO BIOSWALE. SEE PLAN FOR LENGTHS AT ALL OTHER LOCATIONS. DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING P:\U16014 - PRPA CAMPUS\CADD\CP\CX.XX_DETAILED EC PLANS.DWG CX.XX_DETAILED EC PLANS ## ## C5.30 73 EROSION CONTROL PLANS - PHASE 2 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING (SEE DETAILS) COBBLE PAD 5' IN LENGTH PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:38:14 PM P:\U16014 - PRPA CAMPUS\CADD\CP\CX.XX_DETAILED EC PLANS.DWG CX.XX_DETAILED EC PLANS ## ## C5.11 73 EROSION CONTROL PLANS - PHASE 1 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING (SEE NOTE 4) BIOSWALE (SEE NOTE 5) PLACE ROCK SOCK AT EACH CURB CUT LOCATION TO BIOSWALE (ALSO SEE NOTE 5) REFER TO NOTE 6 FOR WORK WITHIN THE ROW REFER TO NOTE 6 FOR WORK WITHIN THE ROW GRADE BREAK EXISTING BIOSWALE EXISTING CURB CUT EXISTING CURB CUT APPROXIMATE PHASE 2 GRADING LIMITS (SEE SHEET C5.20) PLACE COBBLE PAD AT D/S END OF EACH CURB CUT (SEE DETAILS) COBBLE PAD 5' IN LENGTH REFER TO NOTE 6 FOR WORK WITHIN THE ROW PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 30' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 4:38:07 PM P:\U16014 - PRPA CAMPUS\CADD\CP\CX.XX_DETAILED EC PLANS.DWG CX.XX_DETAILED EC PLANS ## ## C5.10 73 EROSION CONTROL PLANS - PHASE 1 0 30' 60' SCALE: 1" = 30' 15' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: DANFIELD CT UNION PACIFIC RAILROAD TIMBERLINE ROAD HORSETOOTH ROAD KEYMAP 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING CHAIN LINK FENCE SILT FENCE VEHICLE TRACKING CONTROL PAD SEDIMENT CONTROL LOG CONCRETE WASHOUT AREA - FINAL LOCATION TO BE DETERMINED BY CONTRACTOR SURFACE ROUGHENING (SEE EROSION CONTROL NOTE 5) DANDY BAG INLET PROTECTION FOR COMBO INLET ROCK SOCK CONSTRUCTION FENCE NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOES NOT GUARANTEE THE ACCURACY OF SUCH INFORMATION. EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHT LINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLIC AND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACT UTILITY LOCATIONS. 2. ALL DISTURBED AREAS NOT PAVED SHALL BE REVEGETATED PER THE LANDSCAPE PLANS. 3. REFER TO SHEETS C5.01-C5.05 FOR DETAILED GRADING PLANS. 4. THE PROPOSED POND SOUTH OF HEADQUARTERS, BEING BUILT WITH PHASE 1, SHALL BE CLEANED OF ANY SEDIMENT THAT MAY HAVE ENTERED THE POND PRIOR TO FILLING THE POND. ONCE FILLED, THE POND SHALL BE PROTECTED FROM SEDIMENT BY PLACING SILT FENCE AROUND THE POND AS NECESSARY UNTIL THE AREAS UPSTREAM OF THE POND HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 5. SEDIMENT SHALL BE PREVENTED FROM ENTERING THE BIOSWALE ON ALL SIDES WITH THE USE OF SILT FENCE, STRAW WATTLES, OR ROCK SOCKS UNTIL THE AREAS UPSTREAM OF THE BIOSWALE HAVE BEEN STABILIZED EITHER WITH PAVING OR VEGETATION. 6. FOR WORK WITHIN STREET RIGHT-OF-WAY, CONTRACTOR SHALL: · EXPEDITE CONSTRUCTION COMPLETION AFFECTING ROADWAYS · NOT USE THE STREET TO STOCKPILE EARTH DURING TRENCHING ACTIVITIES · SWEEP SEDIMENT WITHIN STREET DAILY OR PRIOR TO AND AFTER STORM EVENTS AS NECESSARY · PLACE ROCK SOCKS ON DOWNSTREAM SIDE OF WORK AREA IN PAVED AREAS TO PREVENT SEDIMENT TRANSPORT · SURFACE ROUGHEN LANDSCAPED AREAS UNTIL STABILIZED WITH LANDSCAPING EXISTING CONCRETE PAVEMENT OR SIDEWALK PROPOSED CONCRETE PAVEMENT OR SIDEWALK PROPOSED BUILDING EROSION CONTROL NOTES 1. THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEE FINAL LANDSCAPE PLAN FOR DETAILS. 2. REFER TO SHEET C0.01 FOR STANDARD EROSION AND SEDIMENT CONTROL CONSTRUCTION PLAN NOTES. 3. EROSION CONTROL PRACTICES, SITE PROTECTION, AND REVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS. 4. CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE, RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION, CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS AS APPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT AS NECESSARY UNTIL LANDSCAPING IS INSTALLED. 5. ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULD ALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES AS NECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100' AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARE NOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE, CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENT TRAP. 6. SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPE AREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000 SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTED ONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFER TO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH 12-132. 7. TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT A GRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITE SHALL BE SEEDED WITH THE APPROPRIATE SEED MIX AND INSTALLATION METHOD AS SPECIFIED ON THE APPROVED LANDSACPE PLANS. 8. A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALL BE USED: INGREDIENT % AVAILABLE BY WEIGHT APPLICATION RATE IN LBS/ACRE EXISTING STORM SEWER DANDY BAG INLET PROTECTION FOR TYPE R INLET DANDY BAG INLET PROTECTION FOR AREA INLET COBBLE PAD PROJECT: PLATTE RIVER POWER AUTHORITY HQ BEST MANAGEMENT PRACTICE ITEM: PRESERVE EXISTING VEGETATION SILT FENCE VEHICLE TRACKING CONTROL STAGING AREAS CONSTRUCTION FENCE CONCRETE WASHOUT AREA SWALE AND SLOPE PROTECTION SIDEWALK CHASE/PAN FILTER (RS) TEMPORARY SEEDING INLET PROTECTION (EXIST. & PROP.) 1. COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OF CONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS. 2. CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs. MOBILIZATION DEMOLITION UTILITY INSTALLATION BUILDING CONSTRUCTION SITE GRADING & PAVING FINAL LANDSCAPING PHASE OF CONSTRUCTION & STABILIZATION EROSION CONTROL SEQUENCING 2001 DANFIELD LLC HQ BUILDING MICROWAVE BUILDING MAINTENANCE SHOP / TRUCK WASH POOL CAR WAREHOUSE SUBSTATION GARAGE FLEET PARKING GARAGE A PROPOSED POND FLEET PARKING GARAGE B BIOSWALE W/ UNDERDRAIN POTENTIAL FUTURE PARKING AREA POTENTIAL FUTURE BIOSWALE UNDERGROUND DETENTION EXISTING STORM DRAINING BASIN OS3 DANFIELD COURT PROPOSED POND C1 1.15 PLATTE RIVER POWER AUTHORITY 02/14/18 U16014 1" = 60' 1" = N/A PLATTE RIVER POWER AUTHORITY HQ NORTH 2/9/2018 5:32:19 AM P:\U16014 - PRPA CAMPUS\CADD\CP\C6.00_PROPOSED DRAINAGE PLAN.DWG C6.00_PROPOSED DRAINAGE PLAN KRB NKS C6.00 73 DRAINAGE PLAN 0 60' 120' SCALE: 1" = 60' 30' PREPARED FOR: JOB NUMBER SHEET NUMBER OF SHEETS DATE SUBMITTED: The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to or uses of these plans. All changes to the plans must be in writing and must be approved by the preparer of these plans. NO. BY DATE CAUTION REVISIONS: VERTICAL: HORIZONTAL: SCALE PRELIMINARY PLANS NOT FOR CONSTRUCTION 1501 Academy Ct. Ste. 203 Fort Collins, CO 80524 (970) 530-4044 www.unitedcivil.com Civil Engineering & Consulting PROJ. MGR: DRAWING NAME: PATH: DATE: TIME: DESIGNER: UNITED CIVIL Design Group LLC CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: APPROVED: NOTES 1. EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATE UTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BEST INFORMATION AVAILABLE TO THE ENGINEER. 2. VEGETATIVE SWALES, BIOSWALES, UNDERGROUND DETENTION AND THE WATERQUALITY AND DETENTION POND SHALL BE MAINTAINED BY THE PROPERTY OWNER AND FOLLOW APPLICABLE STANDARD OPERATING PROCEDURES AS SHOWN IN DEVELOPMENT AGREEMENT. 3. FUTURE DETENTION AND LID IMPROVEMENTS WILL BE REQUIRED WITHIN BASIN A-12 WITH FUTURE DEVELOPMENTS. 5124 5124 PROPOSED 1' CONTOUR EXISTING 1' CONTOUR STORM SEWER STORM INLET LEGEND EXISTING CURB & GUTTER PROPOSED CURB & GUTTER PROPOSED FLOWLINE LIMITS OF DISTURBANCE EXISTING PROPERTY LINE EXISTING R.O.W LINE EXISTING EASEMENT BASIN BOUNDARY SWALE SECTION D-101 XXXX BASIN DESIGNATION BASIN AREA (ACRE) 2 - YR RUNOFF COEFF. 100 - YR RUNOFF COEFF. DESIGN POINT FLOW DIRECTION 5125 5125 PROPOSED 5' CONTOUR EXISTING 5' CONTOUR A A DRAINAGE SUMMARY POND SUMMARY LOW IMPACT DEVELOPMENT TREATMENT SUMMARY Basin Proposed Impervious Area LID Treatment Area Treated % of Site Treated (sf) (acres) (sf) (%) A-1 24,426 None 0 0% A-2 33,295 None 0 0% A-3 16,242 Underground Detention 16,242 6% A-4 21,811 Underground Detention 21,811 8% A-5 14,736 Underground Detention 14,736 5% A-6 7,951 Underground Detention 7,951 3% A-7 8,071 Underground Detention 8,071 3% A-8 6,189 Underground Detention 6,189 2% A-9 28,026 Underground Detention 28,026 10% A-10 28,393 Underground Detention 28,393 10% A-11 11,838 Underground Detention 11,838 4% A-12 (Future) 19,000 Future LID Treatment 19,000 7% A-13 11,517 None 0 0% B-1 10,125 Bioswale 10,125 4% B-2 26,917 Bioswale 26,917 10% C-1 5,726 Wet Pond 5,726 2% Total Site 274,263 205,024 75% Pond A1 Pond C1 WQCV REQUIRED 0.18 AC-FT 0.01 AC-FT WQCV PROVIDED 0.24 AC-FT 0.02 AC-FT DETENTION VOLUME REQUIRED 2.58 AC-FT 0.33 AC-FT DETENTION VOLUME PROVIDED 2.89 AC-FT 0.35 AC-FT WQCV WATER SURFACE ELEVATION 4949.50 4955.03 100-YEAR WATER SURFACE ELEVATION 4,952.25 4,955.50 TOP OF POND ELEVATION 4,953.25 4,956.50 Proposed Basins Basin Area %I C2 C100 Q 2 Q100 (acre) (cfs) (cfs) A-1 3.49 16% 0.32 0.40 2.16 9.43 A-2 0.91 82% 0.83 1.00 2.15 9.10 A-3 0.37 90% 0.95 1.00 1.01 3.71 A-4 0.57 87% 0.86 1.00 1.39 5.64 A-5 0.40 85% 0.84 1.00 0.95 3.96 A-6 0.41 41% 0.53 0.67 0.62 2.72 A-7 0.32 53% 0.63 0.79 0.49 2.37 A-8 0.21 62% 0.71 0.89 0.42 1.84 A-9 0.64 90% 0.95 1.00 1.74 6.41 A-10 0.68 87% 0.92 1.00 1.78 6.74 A-11 0.97 27% 0.41 0.51 1.06 4.63 A-12 1.15 6% 0.23 0.29 0.68 2.95 A-13 0.26 90% 0.95 1.00 0.72 2.63 A-TOTAL 10.38 45% 0.56 0.70 10.46 45.52 B-1 0.42 53% 0.61 0.76 0.69 3.22 B-2 1.45 43% 0.52 0.65 1.90 8.28 B-TOTAL 1.87 46% 0.54 0.68 2.55 12.59 C-1 1.23 11% 0.28 0.35 0.98 4.27 C-TOTAL 1.23 11% 0.28 0.35 0.98 4.27 OS-1 0.68 2% 0.20 0.25 0.31 1.42 OS-2A 0.21 2% 0.20 0.25 0.11 0.51 OS-2B 0.93 80% 0.81 1.00 1.80 8.62 OS-3 0.42 84% 0.85 1.00 0.89 4.16 OS-4 1.35 71% 0.74 0.92 2.82 12.31 OS-5 0.54 2% 0.20 0.25 0.24 1.05 Asphalt Paving Landscaping Construction Activities Construction Sequence Today Planned for this Week Planned for Next Week Erosion & Sediment Control Measures Inspection Date: ______________ Time: ___________ __ a.m. __ p.m. Temp: ____° F. Weather Conditions (rain, snow, cloudy, windy, etc.): ______________________________________________________________________ Type of Activity ____ Other (describe below) _____________________________ _____________________________ _____________________________ Reason for Inspection (check one): ____ Water Running Across Site No. ____ Complaint ____ High Winds ____ Routine Permit No.: Needs Replacement (Not Functional) EROSION AND SEDIMENT CONTROL INSPECTION FORM The Contractor or Agent shall inspect all BMPs at a minimum once every two (2) weeks and after each Significant Storm Event. Subdivision, Project or Site Name: OS-3 OS-3 0.42 0.84 0.85 1.00 1.01 4.16 S-4 OS-4 1.35 0.71 0.74 0.92 2.82 12.31 OS-5 OS-5 0.54 0.02 0.20 0.25 0.24 1.05 Totals 70.49 105.96