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HomeMy WebLinkAbout1.04 ErosionSedimentControlStormwater Management Plan for: Buffalo Valley, GARFIELD COUNTY, CO Prepared for: Partners III, LLC 353 Goose Lane Carbondale, CO 81623 Prepared by: Date: July, 2013 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826 1/2 Grand Avenue Glenwood Springs, CO 81601 ph 970.945.5544 fx 970.945.5558 www.mountaincross-eng.com MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826 '/2 Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Table of Contents Introduction 1 SWMP Administrator 2 Sequence of Major Activities 2 Identification of Potential Pollution Sources 3 Allowable Sources of Non-Stormwater Discharge 3 Storm Water Management Plan 4 Best Management Practices (BMPs) 4 Erosion, Drainage, and Sediment Control BMPs 4 Non-Stormwater Control BMPs 5 Phased BMP Implementation 5 Materials Delivery and Storage 5 Vehicle Cleaning, Fueling, Maintenance, and Tracking Controls 6 Waste Management and Disposal 6 Dewatering 6 Inspection and Maintenance 7 Inspection Schedule 7 Areas for Inspection 7 Maintenance 8 Documenting Inspections and Maintenance 8 SWMP Plan Revisions 8 Inactivation Notice 9 Appendix A General Permit Application Appendix B SWMP Plan Appendix C Details Sheet Appendix D Inspection and Maintenance Report Form Appendix E Inactivation Form MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826 1/2 Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 Introduction This Stormwater Management Plan (SWMP) is intended to satisfy the requirements of the Colorado Department of Public Health and Environment (CDPHE) permit for Stormwater Discharges Associated with Construction Activities (Permit). This is the SWMP that was prepared to fulfill the requirements of the application to CDPHE; a copy of the application is attached in the appendices. The objectives of this SWMP are: 1. Identify potential sources of pollution which may reasonably be expected to affect the quality of stormwater discharges associated with construction activity within the project site. 2. Explain the methods that will be used to reduce the pollutants in stormwater discharges of construction activity on the project site using Best Management Practices (BMPs). 3. Ensure that BMPs are selected, installed, and maintained using good engineering practices. 4. Maintain compliance with the terms and conditions of the Permit. 5. Serve as a reference for the anticipated stormwater management expected on the project site for the owner, contractors, architects, engineers, and others involved with the construction of the project. Site Description The project is a redevelopment of the Buffalo Valley site in Garfield County, Colorado. The existing site has a restaurant and motel with parking and infrastructure and is located at 3637 Highway 82. Proposed plans are the construction of site construction to contain two buildings that have a total of 56 apartments. The project elevation is approximately 5880 feet above sea level and located at Latitude 39°30' 19.1" North and Longitude 107°18'24.1" West. The property area is approximately 2.204± acres and the approximate area of disturbance due to construction activities is approximately 2.01± acres. Storm water will drain into the Roaring Fork River through a series of ditches and culverts approximately 250' to the east. The soils survey performed by the USDA identifies that most of the area to be disturbed is comprised of Atencio-Azeltine Complex, 1% to 12% and hydrologic group "B". Estimated existing SCS runoff curve number before construction activities is 89.37 and estimated SCS runoff curve number after construction is completed is estimated to be 94.5. The existing vegetative ground cover of the area to be disturbed is a mixture of mature native vegetation or existing grasses most of the site is covered with impervious paving and building roofs. The receiving waters of the project will drain into the Roaring Fork River approximately 250 feet to the east through a series of ditches and culverts. A copy of the SWMP Plan Maps are attached in the appendices. Page 1 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 SWMP Administrator The SWMP Administrator is responsible for the process of developing, implementing, maintaining, and revising this SWMP as well as serving as the comprehensive point of contact for all aspects of the facility's SWMP. For this Permit, the responsibility of the SWMP Administrator must be shared. The entity responsible for the developing the SWMP is the Preparer described below. The entity responsible for the implementation, revisions, and maintenance of the SWMP will be the Manager who shall also be the general contractor of the construction project. The contact information for the Manager shall be completed below by the project Owner once the general contractor is determined. The Point of Contact duties will be divided to either the Preparer or the Manager depending on the reason or need for the contact. Preparer: Manager: Mountain Cross Engineering, Inc. Chris Hale, PE 826 1/2 Grand Avenue Glenwood Springs, CO 81601 Ph: 970.945.5544 Fx: 970.945.5558 Company: Contact: Address: City, State, Zip: Ph: Fx: Sequence of Major Activities The major construction activities are generally described below and are generally completed in the following sequence: 1. Survey: Survey information is located for project control, limits of disturbance, excavation, and/or cut and fill staking 2. Installation of Temporary BMPs: Temporary sediment controls are placed, such as straw bales and silt fence and/or other as necessary. 3. Vegetation Clearing: Vegetation is cleared/grubbed and disposed of in an appropriate manner and/or chipped to create mulch for soil stabilization. 4. Diversions: Diversions are placed as necessary to prevent concentrated flows from discharging onto the area of disturbance. Diversions are culverts, ditches, etc that are used to convey site water to discharge points. Diversions likely require temporary BMPs such as silt fence or straw bales along the length of the diversion to trap sediment or diversions may direct flows to detention or retention BMPs such as check dams or sediment traps. 5. Stripping Topsoil: All topsoil is removed from areas that are to be excavated, filled, covered with hardscape, or turned into stabilized, temporary surfaces. Topsoil is to be stockpiled in areas sufficient to accommodate the quantities of topsoil being generated. 6. Demolition and Major Grading: Existing structures, appurtenances, and hardscape are demolished and removed. Trash and debris is salvaged as much as practical and the rest is Page 2 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 disposed of in an appropriate and approved manner. The project site is graded and areas of cut and fill are removed and placed to provide rough surface elevation of planned project elevations, temporary construction staging, construction vehicle traffic, and/or building sites. 7. Gravel Surfacing: Areas used for access, parking, or materials staging is gravel surfaced. 8. Foundation Construction: Foundations of the buildings are constructed. 9. Building Construction: Buildings, hardscape, utilities etc. are constructed. 10. Reclamation of Unused Areas: Areas not needed for facilities, roads, parking, or materials staging are reclaimed. Salvaged topsoil is spread and revegetated. 11. Finished Grading: Finished grading is performed to create the landscape features and the proposed project topography. Irrigation systems are installed. 12. Cleanup: All construction -related debris is removed and disposed of in an appropriate and approved manner and disposal facility. 13. Topsoil Placement: Stockpiled topsoil is evenly spread over the finished grades. 14. Vegetation: Landscaping is installed per the landscape plan and any remaining disturbed areas are revegetated with an approved native grass seed mix. 15. Project Stabilization: Revegetation progress is reviewed and project erosion stability is evaluated. Additional measures, revegetation, and/or stabilization are implemented until the project site reaches 70% vegetative cover. At that time the SWMP Manager removes all temporary erosion and sediment control measures and the project no longer requires coverage under the Permit. The Manager submits an Inactivation Notice that closes the Permit with CDPHE. Identification of Potential Pollution Sources Potential sources of pollution are associated with all phases of the project from the start of construction though project stabilization. The most common source of pollution during construction is sediment resulting from the erosion of recently cleared and/or graded areas, such as cut/fill slopes and soil stockpiles. However, there may be many locations of potential pollution sources at any given time. The following items are potential sources of pollutants: • Disturbed and stockpiled soils. • Vehicles tracking mud. • Storage of materials (construction materials, aggregates, fuel, chemicals, etc.) • Vehicle and equipment maintenance and fueling. • Site maintenance where fertilizers, pesticides, detergents, paints, etc. are used. • Construction material waste piles, dumpsters, etc. • Asphalt and concrete construction including truck and equipment washing • Employee trash and biological waste. Allowable Sources of Non-Stormwater Discharge Allowable sources of non-stormwater discharges include the following: Uncontaminated Springs: There may be seasonal springs within the project area. Page 3 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 Landscape Irrigation: There are several locations where pipelines and ditches cross through the project for irrigation of neighboring properties. Construction Dewatering: Construction dewatering may be necessary. Concrete Washout: Concrete washout may be necessary. Emergency Fire Fighting Water: Water used to put out any type of fire. No other discharges are allowed under the Permit. Any other non-stormwater discharge would require a different permit. Storm Water Management Plan A copy of the SWMP Plan Maps are attached in the appendices. Existing and proposed contours, drainage patterns, site features, property lines, and proposed construction are included on the SWMP. Locations of temporary and permanent BMPs are also shown. Details of correct BMP installation are included on the details sheet that is also attached in the appendices. Best Management Practices (BMPs) A key component of this SWMP is employing BMPs to improve stormwater quality. The construction site will be continually evaluated to determine what BMPs are suitable and practical at different locations. BMPs will be employed in different combinations during construction activities and phases as conditions warrant. Erosion, Drainage, and Sediment Control BMPs The primary method for controlling erosion, drainage, and sediment transport consists of minimizing initial disturbance of the soil and ground cover. However, many other methods can also be used. All stormwater-related BMPs will fall under at least one of the following three types of controls: • Erosion Control. Any source control practice that protects the soil surface and/or strengthens the subsurface in order to prevent soil particles from being detached by rain or wind, thus controlling raindrop, sheet, and/or rill erosion. • Drainage Control. Any practice that reduces or eliminates gully, channel, and stream erosion by minimizing, diverting, or conveying runoff. • Sediment Control. Any practice that traps the soil particles after they have been detached and moved by wind or water. Sediment control measures are usually passive systems that rely on filtering or settling the particles out of the water or wind that is transporting them prior to leaving the site boundary. BMPs may also be classified as either structural or non-structural controls: • Structural Control. Handles sediment -laden stormwater prior to it leaving each site. Structural BMPs are used to delay, capture, store, treat, or infiltrate stormwater runoff. Some examples of structural BMPs include sediment traps, straw bales, and silt fences. • Non-structural Control. Reduces the generation and accumulation of pollutants, including sediment, from a construction site by stabilizing disturbed areas and preventing the occurrence of erosion. Some examples of non-structural BMPs include revegetation, mulching, and surface roughening. These types of stabilization techniques are not only the most effective Page 4 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 method for reducing soil loss, but they are also normally the most cost effective because they have low construction costs, are easy to construct, and have low maintenance requirements. The SWMP, in the appendices, shows the proposed locations of all erosion, drainage, and sediment control BMPs (both structural and non-structural). Construction details are shown on the detail sheet, also in the appendices. Maintenance information for BMPs is provided later in this document. Non-Stormwater Control BMPs Non-stormwater controls include general site and materials management measures that indirectly aid in the minimization of water pollution. Types of pollution sources include, but are not limited to, litter, oil and grease, hazardous material spills, and sediment. Phased BMP Implementation Various BMPs will be implemented and maintained during different phases of the project: • Preconstruction. Install BMPs around site perimeter, conveyances, and at discharge points such as silt fencing, straw balls, ditches, sediment basins, etc. • Construction. Install BMPs to control erosion and sedimentation such as fencing around stockpiles, vehicle tracking pads, construction of roadside channels, culverts, riprap, etc. • Interim Reclamation. Install BMPs of surface roughening, mulching, erosion control blankets, seeding of all disturbed areas, etc. Also install permanent BMPs such as detention ponds, spill structures, and hardscape. • Final Reclamation. Remove all temporary BMPs, cleaning of any sediment from permanent BMPs, reseeding of areas not properly vegetated, installation of additional BMPs deemed necessary, etc. Final reclamation also involves the continued maintenance and inspection of all BMPs until final stabilization occurs. Final stabilization occurs once all surfaces are built on, hardscaped, or landscaped to a vegetative cover with a density of 70 percent of pre -disturbance levels. Materials Delivery and Storage The good housekeeping practices listed below shall be followed on site during construction and operation: • All materials stored on site will be stored in a neat and orderly manner in appropriate locations and, where possible, under a roof or other enclosure, to avoid contact with stormwater. • Products will be kept in their original containers with the original manufacturer's label. • Whenever possible, all of the product will be used before disposing of the container. • Manufacturer's recommendations for proper use and disposal will be followed. Material Handling and Spill Prevention In addition to the material storage practices listed above that will be used to reduce the risk of spills or other accidental exposure of materials and substance, clean-up any spills with the use of spill kits and absorbents, and ensure that materials and wash water can not discharge from the site, and never into a stream. Page 5 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 Vehicle Cleaning, Fueling, Maintenance, and Tracking Controls In the event that maintenance is required on construction equipment, all fluids transferred must utilize secondary containment and drip pans to capture materials so that they may be properly disposed of or recycled. Dispose or recycle fluids in compliance with local, state, and federal guidelines. While on site, construction equipment and employee vehicles should be parked, serviced, and/or fueled within designated areas. Periodically inspect construction equipment for leaks. Vehicle tracking of sediments onto public roads is not allowed. Construction equipment should remain on site throughout earth -moving activities and reduce mobilization operations as much as possible. All other vehicles are to remain in stabilized areas and should not enter disturbed areas until that area is revegetated, hardscaped, or otherwise stable. Vehicle tracking pads shall be utilized to minimize sediment tracking. Waste Management and Disposal A few of the waste management procedures that shall be followed include the following: • Proper bins for trash collection and disposal in compliance with local, state, and federal guidelines. • The contractor will provide portable toilets. Sanitary waste will be regularly collected by a licensed sanitary waste management contractor and disposed of in an approved manner. • In the event that sediment is inadvertently transported off the construction site, it will be properly cleaned up. Dewatering Dewatering refers to the mechanical removal of water from an excavation or other structure. Both groundwater and stormwater may require dewatering during construction. Groundwater Dewatering Non-stormwater construction dewatering of groundwater can NOT be discharged to surface waters or to storm sewer systems without separate permit coverage. However, discharges to the ground of water from construction dewatering activities may be authorized, provided that: 1. The source is groundwater and/or groundwater combined with stormwater that does not contain pollutants exceeding the State standards; 2. The source is identified in the SWMP; 3. BMPs are included in the SWMP; and 4. These discharges do not leave the site as surface runoff or to surface waters. Dewatering shall be pumped or diverted to a sediment control BMP prior to discharge to the ground. Locations of groundwater dewatering, as well as any BMPs utilized, shall be noted on the Site Plan as soon as such dewatering occurs. Stormwater Dewatering The discharge to surface water of pumped stormwater from excavations, ponds, silt traps, or the like, is allowed, as long as the dewatering activity and associated BMPs are identified in the SWMP and BMPs are implemented. Stormwater that collects in open depressions or trenches Page 6 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 during construction activities may be dewatered into an adjacent BMP, such as a pond or a check dam. Inspection and Maintenance The Contractor will inspect and maintain all BMPs that are constructed in accordance with governing specifications and good engineering practices. All employees on the site shall be trained as to the proper location, installation, and use of the BMPs so that anyone can recognize deficient installations, remedy the situation, and minimize the potential off site transport of sediment and other pollutants. Inspection Schedule A first inspection will occur upon installation of any BMPs. An inspection is required as soon as the first soil disturbance occurs at the site. During Construction: The minimum inspection schedule during construction activities must be at intervals no greater than 14 calendar days or within 24 hours of any precipitation event or any snowmelt that causes surface erosion. If construction efforts are halted, post -storm event inspections must be conducted prior to restarting construction activities at the site, but no later than 72 hours following a storm event. Routine inspections still must be conducted at least every 14 calendar days. During Interim or Final Reclamation: The minimum inspection schedule during reclamation activities must be at intervals no greater than monthly. This includes a thorough inspection of the site stormwater management system. This will continue until final stabilization occurs. During Winter Condition: Inspections are not required where construction activities are halted due to snow cover over the entire site for an extended period. But if melting snow poses a risk of soil erosion then the minimum inspection schedule must be at intervals no greater than 14 calendar days or within 24 hours of any precipitation event that causes surface erosion. Significant potential for erosion and BMP failure exists when melting begins. Areas for Inspection Inspections will be conducted by qualified personnel on the following areas: • All vegetated areas until 70% of pre -disturbance vegetation levels are reached. • All BMP measures identified in this document. • Construction site perimeter and discharge points. • All disturbed areas. • Areas used for storage of material/waste that are exposed to precipitation. • Any other area that has a significant potential for pollution Areas are to be inspected for sediment leaving the project boundaries, entering a stormwater drainage system, or discharging to state waters. All BMPs are to be inspected to determine if they are still performing correctly and are in working order by adequately control sediment. Any BMPs not operating correctly are to be repaired or replaced as soon as possible. Page 7 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan Buffalo Valley July, 2013 Maintenance Maintenance activities are to ensure that all BMPs are functioning as intended. Any maintenance, repairs, or replacements deemed necessary after required inspections will be corrected as soon as possible. Maintenance will include, but is not limited to: • Pickup or prevent trash, construction materials, and chemicals from being carried away by runoff from storm events. • Removal of sediment from silt fences, sediment traps, and other sediment controls. • Reseeding of any bare spots where vegetation has failed to establish. • Repairs, additions, and/or adjustments to any erosion and sediment control that is deteriorating or found to be performing inadequately. The following steps will usually be followed: 1. Perform inspections according to the inspection schedule discussed above. 2. Note any BMPs that need maintenance on the inspection and maintenance report form. 3. Obtain materials needed to perform maintenance on the BMPs. 4. Perform maintenance and note the date performed on the inspection and maintenance report form. Documenting Inspections and Maintenance The Contractor shall document inspection results and maintenance activities. These records shall be maintained for a period of 3 years following expiration or inactivation of the SWMP permit coverage. Inspection reports will include the following: • Date of inspection, name of inspector, title of inspector, project inspected, and construction phase. • Observed conditions including: o Discharges of sediment or other pollutants from the site. o BMPs that need to be maintained. o BMPs that failed to operate as designed or proved inadequate. o Any BMPs that were added. • Description of any maintenance and date performed. Any locations necessary to be described for the above reports shall be hand drawn on the SWMP plan. The locations shall be included as necessary to document observations. After an inspection or after maintenance has been performed to complete an inspection report, the Contractor shall sign the report with a statement that the site is in compliance with the permit to the best of the Contractor's ability. SWMP Plan Revisions From time to time site conditions or BMPs may need to be changed. Changes necessary to the SWMP shall be made and noted on the SWMP plan and the Inspection and Maintenance form to match the project site. Any changes necessary shall be made first to the SWMP Plan then incorporated into the project site. Any emergency SWMP changes made in the field shall be added to the SWMP plan within 72 hours after the change. Page 8 of 9 MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.mountaincross-eng.com Stormwater Management Plan BufTale Valley July, 2013 This document and the SWMP Plan and the Inspection and Maintenance records shall be kept at the project site during construction and until final stabilization. These documents will be retained for a period of three years at the office of the Contractor following receipt of the Inactivation Notice, discussed below. These reports will be made available to the CDPHE or the EPA upon requ est. Inactivation Notice Final stabilization occurs once all surfaces are built on, hardscaped, or landscaped to a vegetative cover with a density of 70 percent of pre -disturbance levels. Cance this is reached, the project no longer needs permit coverage. All temporary erosion and sediment control measures are to be removed. The Contractor shall submit an Inactivation Notice to the CDPHE. Upon receipt of the Inactivation Notice, the CDPHE will provide written confirmation that coverage has been terminated. The records will be maintained for a period of three years following receipt of the Inactivation Notice. A blank copy of this form is attached in the appendices. Thank you for the opportunity to provide this report. Feel free to call if you have any questions, concern, or comments. Sincerely, Mountain Cross Engineering, Inc. Claris Hale, PE' MOUNTAIN CROSS ENGINEERING. INC. Civil and Environmental Consulting and Design 826',5 (irand Avenue. Glenwood Springs, CC) 81601 1': 970.9453544 F: 970.945.5558 www.mountaincross-eng.com Page 9 of 9 Appendix A General Permit Application STATE of COLORADO Dedicated to protecting and improving the health and environment of the people of Colorado 4300 Cherry Creek Dr. 5. Denver, Colorado 80246-1530 Phone (303) 692-2000 TDD Llne (303) 691-7700 Located in Glendale, Colorado http://www.cdphe.state.co.us Colorado Department of Public Health and Environment For Agency Use Only Permit Number Assigned COR03- Date Received / / Month Day Year COLORADO DISCHARGE PERMIT SYSTEM (CDPS) STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED. 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 must be submitted by mail or hand 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 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. PERMIT INFORMATION Reason for Application: p NEW CERT ❑ RENEW CERT EXISTING CERT # 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 (listed in item 1) 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 page 1 of 5 revised April 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: Page 2 of 5 revised April 2011 5) OTHER CONTACT TYPES (check below) Add pages if necessary: ResponsiblePosition (Title): Preparer Currently Held By (Person): Chris Hale, PE Telephone No: 970.945.5544 email address chris@mountaincross-eng.com Organization: Mountain Cross Engineering, Inc. Mailing Address: 826 1/2 Grand Avenue City: Glenwood Springs State: CO Zip: 81601 o Pretreatment Coordinator o Environmental Contact o Biosolids Responsible Party o Property Owner ❑ Inspection Facility Contact ❑ Consultant ❑ Compliance Contact B. Permitted Project/Facility Information Project/Facility Name Buffalo Valley Redevelopment Street Address or cross streets 3637 Highway 82 Stormwater MS4 Responsible Person Stormwater Authorized Representative Other Engineer (e.g., "S. of Park St. between 5th Ave. and 10th Ave.", or "W. side of C.R. 21, 3.25 miles N. of Hwy 10"; 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 with the location more accurately indicated by a map.) City, Glenwood Springs Zip Code 81601 County Garfield 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 39 o 30 ' 19.1 Longitude 107 o 18 ' 24.1 (e.g., 39°46'11"N, 104°53'11"W) degrees minutes seconds degrees minutes seconds For the approximate center point of the property, to the nearest 15 seconds. The latitude and longitude must be provided as either degrees, minutes, and seconds, or in decimal degrees with three decimal places. This information may be obtained from a variety of sources, including: o Surveyors or engineers for the project should have, or be able to calculate, this information. o EPA maintains a web -based siting tool as part of their Toxic Release Inventory program that uses interactive maps and aerial photography to help users get latitude and longitude. The siting tool can be accessed at www.epa.govitri/report/siting_tool/index.htm o U.S. Geological Survey topographical map(s), available at area map stores. o Using a Global Positioning System (GPS) unit to obtain a direct reading. 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 permit will not be issued. 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) page 3 of 5 revised April 2011 E. AREA OF CONSTRUCTION SITE Total area of project site (acres): 2.204 (+/-) Area of project site to undergo disturbance (acres): 2.0 +/- 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 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) Provide both the total area of the construction site, and the area that will undergo disturbance, in acres. 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 (see construction activity description under the APPLICABILITY section on page 1). If the project is part of a larger common plan of development or sale (see the definition under the APPLICABILITY section on page 1), the disturbed area of the total plan must also be included. 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 — Description: G. ANTICIPATED CONSTRUCTION SCHEDULE Construction Start Date: March 2014 Final Stabilization Date: Fall 2015 •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): ditches and culverts Ultimate Receiving Water(s): Roaring Fork River 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. page 4 of 5 revised April 2011 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: (Regulation 61.4 (lei) 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). 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. page 5 of 5 revised April 2011 Appendix B SWMP Plan Map GENERAL NOTES 1. The erwfm control measures are shown 'thematically on the plan sheets. The Contractor N responsbls far placing the erasion aantrd measures as required to protect the site from erosion and transportation af sodkmnt from the sits The rinds representative and the Engineer may require mare or loos erosion control measures. 2. Erosion control measures shoe be gonad Were construction begins and/or placed immediately after disturbance. Construction actMttss shall be phased to minimize sail esposure. Sediment rot Ing practices shalt be Inetdlad and stabilized before ette grading or other construction Is ftl 3. AI ddistlrbed areas and eel stockpiles shall be surface roughened, muiehaL a seeded and mulched to protect from washy farces R they ell remail named and inactive far periods leper than fourteen (14) do., or If soli will be algtasad during winter, am rodeo w5 not ewer during mita @now m.L Disturbed areae .hall bs mulched, or sanded and mulched within seven (7) dam after find grads 1s reached 4. My disturbed area that is not bolt upon for one (1) year or longer shall be renwgetated with Co-op 'Mountain mine motile gram seed hand broadcast at a rate of 30 pounds/Dare, rdaed in and mulched *Rh certified weed free straw mulch. WIthlo ane growing semen of project completion. vegetative efts anwrcge shall be pod to or greater thin seventy (70) percent of the disturbed areae 5. Place soil retention blankets an ad d.hnbed dopes steeper than 4c1 (hav). 6. The wnlroctar shall inspect all erosion and sediment control devices after any precipitation event during construction. and make any neeenry repairs immediately thereafter. At a minimum, erosion and sediment control devices shoe b. Inspected monthly. M inspection log shall be kept an-erte for nevem by Officials until the project Is complete. 7. Dust control during conebactlon shall be provided by the use of watering. Disturbed areas and stockpiles shall be spayed with enter as nsoeray b control dusk 8. Strove or hay bales x11 be placed at any sterm.ater runoff pointe of concentration as necessary to prevent erosion and segmentation from divblrbed area.. 9. Sit fence shall be installed along the edge of creme diebmbed by Gemination and around ter es Sit free shall be staked every six feat and burled IN inches at the bottom of the 10. Topsoil shall be spread on dl disturbed areas and nvegetated per the landscape plan If the Indempe plan dose not specify vegetation In sae disturbed area shall be seeded with 'Mountain Mina' nothw gross seed hand broadcast at a rate of 30 pounds/acre. raced In Md mulched with cerlf i§d weed free straw mulch. The seed may be &II seeded as an alternative to hand broadcast, raked and mulched. Gros es straw mulch Mall be crimped in plan. 11. The prefect all disturb more than ane ares and therefore .111 require a permit from CCPNE. Sadllnent and Broden seminal h rwqukwd h Oor6eld Count} 12. Area of site expected to undergo disturbance t. approximately 20± acres. 13. Estimated nln0ff coefficients of the .It. before construction activities: 89.7 Eatbnoted runoff coefficients of the .te after construction oetMtie@ 94.5. Existing sale ae Atndo-Azeithe complex. 15 to 125 Stopes. 14. Existing vegetation le mainly grass with IowDone of loge. scrub oak. and aspen. Estimated vegetative cover ie 'good' with between 705 vegetative ground cover. 15. Ultimate reahilq eater Is the Roaring Fork Riser approximately 250 feat away through a series of ditches and culverts 16. Slit fencing of tete. construction meses. and drew hole check dame to be in.tdled prior to clearing and excavation octMtkm. Tonory measures of inlet protection, male dada dame. and silt fence round fed dopes and rthdeges to be installed immediately after Items have been Inatdled. Tempary mewnres to be removed Just prior to the installation of permanent measures such os revegatatim. seeding. rip rop, and eat retention blankets 17. Construction activities cam be @wanted to increase the potentld fa storm runoff to erode the alt.. T=paary structures have been designed to contain sediment on the the and to mitigate modem Tram ametructlon activities.. Straw bale cheek dome are placed M bdnaga wales and ditches. Inlets to culverts are protected with straw bales Riprop Is placed on the hist and outlet sides of averts. Sit fencing is shown downhill of oanslruaUan activities The permanent structures eV he rlprap prot.etlon at Inlets and outlets and on dtdl thdwege for elopes where vdadRas are erosive Abs. revegetoIien with turf. lardsepe plants. and/ar cativo gram, with coverage exceeding 705 The revegetatbn h expected to match the quality of the .tam water dlad .0v9qs from the site to prs-project levels or better. 19. Earth d1add be banned on all sides of .ta ail. arses for building materials, fertilizers, Menthols, waste pies. equipment maintenance, and fueling rale Materials should b. .tend off of ground surface and covered when not in ams Sons contaminated by these must be exaameted and deposed of in appropriate manors and at approved Iomtlan. 19. Final .tabllmtian and Zang -tem management measures ars anticipated to Include detention, ripearl of concrntrata Aces, rewgetatlm af site per the landscape plan. and seeding of dbrturbed area§ with native grimes In areas not addressed by the landscape phrh. Final stabilmtlon at the sits le complete when dl soil disturbing activities hew been Cornppl.hd the permanent method" rhaane bean and uniform %wgataths eget n has beesMbfished over at Host 705 of s Z0. 8.e ahNeciural and landempe drawings for construction information pertaining to these Rams 21. Contractor responsible to obtain dl necessary permits and/or approvals odor to beginning construction. 22. Contractor responsible to coordinate locating oil utilities, potholing N mammary. Contractor responsible for any and o11 damage to utility lines 23. Cantractar to .ordinate with gsoteehnfmi engineer far recanrnmdatlms concerning trench stability. safety, and sharing. 24. Concrete than canfcem to the requirements of ACI 301. Minimum strength: re - 3000 pal al 28 days. Placement shall conform to ACI 814. 25. Rebr shall aanfam to the requirements of ASTM A615 Deformed Steel. Grad. 60. Concrete exposed to earth: 3' deo. Conste exposed to weather. 2' dam. 28. 1W aepration between my unitise that may need to be crossed. If 18" eon not be maintained notify engineer for alternatbs Know what's below. CaII before you dig. msnarll .1-.. rAYm t r fl 0. WOW co �•r.drhsead *Is nada aware rlibm • Iowanw.a M.inM' 09�Ww51.090. NSF !IMMO ere MOW,. 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A 1mnpaur err bIlr ..rtrr or pl. eb *Me s0 ar. pled es.r rsseba 1*.• min . rear eb..pa std MI•.I sir r ••••••• ON re ' .....: w dm • !MY. >ksa r spier .ere a• r.prr ad r mair r.�t✓ rr e&dm err e.fl n mo .wF0 r situ widens In a.r1�e 00.want NI 11 madonna Wein Ito deo a a •11"...1142. se adman mir& err ewe ab min -_- a \ \ \ N. •\ \ \ \ 0. \\ \,N \ X 00 J J \5 1 A \\\`a\ \\`\\ \\\\ \\ \ \ \ \ \ n :\‘‘ \\\ \\\'\e \'\‘‘5\..1, \ ‘::\\:\\\\„\s‘\.\\ ;;`\\\\\\\\\\\\\\\\ \\\\\\\` \\\\\\\\YA.\\� a\00 \ \\\\{'\\\\\\\\`\\1\' \\\\\10 \\\ \40. \\ \\� \ \ \ \\ \\\ f�rfa'Ya irk p, �\\\\To waist t5aw5a1ws _ A \\ • • -- / ! / / / / / / / / / / / / / // / / / / / / /// / / / s f/ / / / J. J EROSION CONTROL LEGEND ' / f ( 5870.1 C a C o E J Q J a �= c's 102 2 L 03 a t 1 V+ CO m DAIS 07/16/13 SCALE 1"=20' ENGINEER C. HALE DWG FILE BuffValleySite JOB 554-001 SHEET 4 ®s11 @w A Yd.adm a mAdr eo�� ,� -.. W eMEI. r •.- ..w r ttrlru+.r e.� . s.rn0. 1 r sew i.r arse .m OM.O0. derr 9 4. I.•.r r1 .b Own 5 rte.! 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J EROSION CONTROL LEGEND ' / f ( 5870.1 C a C o E J Q J a �= c's 102 2 L 03 a t 1 V+ CO m DAIS 07/16/13 SCALE 1"=20' ENGINEER C. HALE DWG FILE BuffValleySite JOB 554-001 SHEET 4 Appendix C Details Sheet F1L1FR FABRIC al1H. ETAgoca 4.A• ©RIPRAP APRON NOT TO SCALE INLET PROTECTION NOT TO SCALE 0 MINNS 1. Minimum- 3' MBImEn � `l 1/2 H : 1 V Beer, 4' Mea W I •j0Hm1Sht— 14 14011 or mood 1 P7_�", -moi II lel jj= kr n WALL DETAIL EAI SECIMILted FD STRAW BALE BARRIER NOT 10 IX21F NOT TO SCALE KEY INTO SIDES PVC 20-MIL REQUIRED IF SWALE IS LOCATED MEM 10' OF MEMO SINE BBE SLOPES 1 NAeER • IM fl RLL dI REM VdP W1111111 00 LE= MUM= mwawlu AECIECELA=6 e VEHICLE TRACKING PAD NOT TO SCALE O DRAINAGE SWALE NOT TO SCALE CN SLOPES 42 CR CREASE EROSION PROTECTING CEOPONRf11C OR it Cr RPRAP %re Di �For�mamm�a r RR. n �— ® ' lummox O STRAW BALE STAKING NOT TO SCALE ® mom =MI I, MAME NIS OPEMEINM PM ® GE NEL IN MAW BM MS MOM maa ®�pQAq�m �N. Ifit el. ME !@W II Y U�•1 lib 1Mr 11Ir mll6 WNWI NM II SERSZ LLI1RYR11EEIL "lam °wiLw NAEP eA RB SOIL RETENTION BLANKETS NOT TO SCALE 10 6 DATE 07/16/13 SCALE Varies ENGINEER C. HALE DWG FILE BuffValleySite JOB 554-001 SHEET 5 Appendix D Inspection and Maintenance Report Form SWMP Inspection & Maintenance Report Project Name: Contractor: Project No: Day, Date, & Time: Project Location: Temperature: Inspector Name & Cell #: _ Weather: Most Recent Storm Details: Description of construction activities and approximate acreage disturbed: Description of observations of BMPs, location, type, etc: Description of maintenance activities, repair, replacement, when, where, by whom, etc: Inspector Signature: Cc: "This site is in compliance with the Permit to the best of my ability" Report No.: Pictures Taken: Appendix E Inactivation Form STATE OF COLORADO Dedicated to protecting and improving the health and environment of the people of Colorado 4300 Cherry Creek Dr. S. Denver, Colorado 80246-1530 Phone (303) 692-2000 TDD Line (303) 691-7700 Located in Glendale, Colorado http://www.cdphe.state.co.us Colorado Water Quality Control Division Notice of Termination Construction Stormwater Inactivation Notice www.coloradowaterpermits.com Colorado Department of Public Health and Environment Print or type all information. All items must be filled out completely and correctly. If the form is not complete, it will be returned. All permit terminations dates are effective on the date approved by the Division. MAIL ORIGINAL FORM WITH INK SIGNATURES TO THE FOLLOWING ADDRESS: Colorado Dept of Public Health and Environment Water Quality Control Division 4300 Cherry Creek Dr South, WQCD-P-B2 Denver, CO 80246-1530 FAXED OR EMAILED FORMS WILL NOT BE ACCEPTED. • PART A. IDENTIFICATION OF PERMIT Please write the permit certification number to be terminated Permit Certification Number (four digits, not "0000"): COR03 • PART B. PERMITTEE INFORMATION Company Name Mailing Address City State Zip code Legal Contact Name Phone number Title Email • PART C. FACILITY/PROJECT INFORMATION Facility/Project Name Location (address) City County Zip code Local Contact Name Phone number Title Email Page 1 of 2 form last revised May 2010 COLORADO WATER QUALITY CONTROL DIVISION NOTICE OF TERMINATION www.coloradowaterpermits.com • PART D. TERMINATION VALIDATION CRITERIA One of the criteria (1,2, or 3) below must be met, the appropriate box checked, and the required additional information provided. Part E includes a certification that the criteria indicated has been met. 0 1: FINALLY STABILIZED OR CONSTRUCTION NOT STARTED - The permitted activities covered under the certification listed in Part A meet the requirements for FINAL STABILIZATION in accordance with the permit, the Stormwater Management Plan, and as described below. This criterion should also be selected if construction was never started and no land was disturbed, and an explanation of this condition provided in the description below. 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. REQUIRED - Describe the methods used to meet the final stabilization c described above (include additional pages if necessary) !l 2: ALTERNATIVE PERMIT COVERAGE OR FULL REASSIGNMENT - All ongoing construction activities, including all disturbed areas, covered under the permit certification listed in Part A have coverage under a separate CDPS stormwater construction permit, including the permit certification issued when Division's Reassignment Form was used by the permittee to reassign all areas/activities. REQUIRED — Provide the permit certification number covering the ongoing activities: COR03 3: 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 receipt, letters, etc. STOP! One of the three criteria above MUST BE CHECKED and the required information for that criterion provided, or this form will not be processed and the permit will remain active. • PART E. CERTIFICATION SIGNATURE (Required for all Termination Requests) I understand that by submitting this notice of inactivation, 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. I certify under penalty of law that I have personally examined and am familiar with the information submitted herein, and 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 and imprisonment. (See 18 U.S.0 1001 and 33 U.S.C. 1319.) I also certify that I am a duly authorized representative of the permittee named in Part B. Signature of Legally Responsible Party Date Signed Name (printed) Title Signatory requirements: This form shall be signed, dated, and certified for accuracy by the permittee in accordance 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 wither a principal executive officer, ranking elected official, or other duly authorized employee. Page 2 of 2 form last revised May 2010