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Home My WebLink AboutBREEZE THRU HEADQUARTERS - FDP190003 - SUBMITTAL DOCUMENTS - ROUND 1 - EROSION CONTROL LETTER/REPORT1 Breeze Thru Headquarters 6464 South College Avenue Fort Collins, CO 80525 February 6th, 2019 Prepared For: Wenga, LLC 725 East Mulberry Rd Fort Collins, Colorado 80524 Prepared By: Baseline Engineering Corporation 112 North Rubey Drive, Suite 210 Golden, Colorado 80403 Noah Nemmers, P.E. Job No. PL375 EROSION CONTROL NARRATIVE 2 CONSTRUCTION ACTIVITIES STORMWATER MANAGEMENT PLAN FOR BREEZE THRU HEADQUARTERS TABLE OF CONTENTS INTRODUCTION .......................................................................................................................... 3 PROJECT DATA ........................................................................................................................... 3 1. Project Location .................................................................................................................. 3 2. Permittee and SWMP Administrator - Local Contact/Project Manager .............................. 3 3. Owner ................................................................................................................................. 3 4. Consultant........................................................................................................................... 4 5. Acreage .............................................................................................................................. 4 6. Current Site Conditions (Project Site) ................................................................................. 4 7. Project Description.............................................................................................................. 6 8. Placement of Water Quality BMP’s ................................................................................... 10 9. Permanent Stabilization .................................................................................................... 10 10. BMP Maintenance ............................................................................................................ 10 REFERENCES ........................................................................................................................... 12 APPENDIX .................................................................................................................................. 13 A. VICINITY MAP B. CONSTRUCTION GENERAL PERMIT C. STORMWATER CONSTRUCTION SITE INSPECTION REPORTS D. SWMP AMENDMENT LOG E. SPILL PREVENTION AND CONTROL PLAN F. CORRECTIVE ACTION REPORT G. EROSION CONTROL PLAN (C1) AND DETAILS (C1) 3 CONSTRUCTION ACTIVITIES STORMWATER MANAGEMENT PLAN FOR BREEZE THRU HEADQUARTERS INTRODUCTION This report was prepared in compliance with Colorado Department of Public Health and Environment (CDPHE) requirements for a Stormwater Management Plan. The essential data is tabulated in worksheet format. Narrative sections are included where required. PROJECT DATA 1. Project Location Name of Project or Development: Breeze Thru HQ Street Address: 6464 S. College Ave. Fort Collins, CO 80525 Township: 6 North, Range: 69 West, Section: 12, Quarter Section: SW Latitude (+/‐ 15") 40°28’49”N, Longitude (+/‐ 15") 105°04’36”W Metropolitan District: Trilby Corner 2. Permittee and SWMP Administrator ‐ Local Contact/Project Manager Name: Devon Smith Company Name: Beacon Construction Mailing Address: 902 West Drake Road, Unit 7 City, State, and Zip Code: Fort Collins, CO 80526 Phone Number: 970‐212‐2432 Cell: 970‐290‐6361 Email: devon@beacon‐con.com 3. Owner Name: John Agnew Company Name: Wenga, LLC Mailing Address: 725 East Mulberry Street City, State, and Zip Code: Fort Collin, CO 80524 Phone Number: 970‐485‐0287 Email: silverwash@aol.com 4 4. Consultant Company Name: Baseline Engineering Corporation Mailing Address: 112 N. Rubey Dr, Suite 210. City, State, and Zip Code: Golden, CO 80403 Phone Number: 303‐940‐9966 ex. 215 FAX Number 303‐940‐9959 Project Engineer: Jesse Carano Email: jesse.carano@baselinecorp.com Cell: 617‐803‐1166 5. Acreage A. Site Acreage: ±1.56 B. Acreage subject to disturbance: ±0.59 Calculations include all areas proposed for contractor laydown, materials storage, equipment storage, and areas where equipment repair and fueling will occur. 6. Current Site Conditions (Project Site) A. Past Land Use: (may be for partial site) i. Known Landfill site: YES NO ii. Has any of the following activities occurred on site: (a) Metal Refining YES NO (b) Petroleum Refining YES NO (c) Petroleum Storage YES NO (d) Chemical Manufacturing YES NO (e) Pesticide/Fertilizer Manufacture/Storage YES NO (f) Rail Yard YES NO iii. If the response to any of the above is Yes, Please describe. B. Possible Site Contamination: i. Known Radium Site: YES NO 5 ii. Known Toluene Site YES NO iii. Known Superfund Site YES NO iv. Known CERCLA Site YES NO v. Known RCRA Site YES NO vi. If the response to any of the above is yes, Please describe. vii. Describe any other known site contamination: No other known contamination on the site. C. Current Land Use: i. Describe existing use: Educational space for hair salon professionals ii. Are there any building/structures on site? YES NO D. Existing Topography i. Describe: The entire site slopes Southwest to Northeast ii. Highest elevation: 5021 feet (Southwest Corner of the site) iii. Lowest elevation: 4999 feet (Northeast corner of the site) iv. Steepest Slope: 11.5% v. Location: East side of site. vi. Average Slope: 5.5% vii. Direction: Northeast E. Vegetation i. Identify the types of vegetation found on‐site: The project area is almost entirely impervious. Some native grasses, a tree, and shrubs exists at the east property line. ii. Estimate the existing vegetative ground cover on site: <5% F. Drainage i. Identify all areas tributary to the site: The site receives some runoff from the property directly to the south via surface flow. ii. Identify the State Receiving Waters: Fossil Creek Reservoir via Fossil Creek iii. Describe the flow routing from the site to the Receiving Waters: Runoff is collected and conveyed in gutters and roof drains to grade. Runoff surface flows SW to NE over asphalt and ultimately reaches a drainage ditch on the east edge of the site. Flows are conveyed in the this drainage way to the northeast ultimately reaching Fossil Creek. 6 iv. Are there any springs or seeps located on‐site? YES NO v. Are there any defined drainage channels on‐site? YES NO vi. Does the site fall within a Regulatory Floodplain? YES NO G. Wetlands i. Identify all on‐site wetlands/wetlands channels: Wetland / Drainage way off‐site at the east property line. ii. Define the dimensions/surface areas for each identified wetland area. iii. Tributary or adjacent Wetlands Areas (a) upstream of the site? YES NO (b) downstream of the site? YES NO iv. Will the proposed construction work impact any of the on‐site wetland areas? YES NO H. Soils i. Identify the predominant Hydrologic Soil Group found on site. A B C D ii. What is the runoff coefficient for the undeveloped site C5=0.71, C100=0.82 iii. Describe the soil texture found on‐site. Hedlt Clay Loam iv. Is there any outcropping of bedrock on site? YES NO v. Will grading or excavation on site reach bedrock? YES NO If Yes, what is the depth of the bedrock? vi. Will grading or excavation penetrate the Water Table? YES NO vii. If Yes, what is the depth of the Water Table? I. Erosion Potential The erosion potential for the site soils is minimal. Construction BMP’s will be erected prior to site disturbance and remain in place until permanent vegetation/stabilization is established. Excess soil will be hauled off. 7. Project Description A. Proposed Construction i. Identify which of the following activities will occur during development of the site: (a) Clearing and Grubbing YES NO 7 (b) Mass Overlot Grading YES NO (1) Cut Operations YES NO If yes, estimate volume of cut (cubic yards) 80 (2) Fill Operations YES NO If yes, estimate volume of fill (cubic yards) 0 (c) Building Demolition YES NO (d) Foundation Excavation YES NO (e) Utility Construction YES NO (f) Street Construction and Paving YES NO (g) Building Construction YES NO (h) Parking Lot Construction/Paving YES NO (i) Landscaping YES NO ii. Will Storm and Sanitary Sewer systems be constructed as Public Sewers? Sanitary: YES NO Storm: YES NO B. Construction Scheduling Phase I i. Demolition (a) Proposed Start Date 4/19 (b) Proposed Completion Date 5/19 Phase II i. Grading and Shoring Operations (a) Proposed Start Date 5/19 (b) Proposed Completion Date 6/19 ii. Utility/Infrastructure Construction (a) Proposed Start Date 6/19 (b) Proposed Completion Date 7/19 8 iii. Building Construction (a) Proposed Start Date 7/19 (b) Proposed Completion Date 9/19 iv. Landscaping/Site Stabilization (a) Proposed Start Date 9/19 (b) Proposed Completion Date 10/19 C. Construction Phasing Phase I i. Demo Operations There are areas of existing concrete and asphalt pavement that will be sawcut or removed to accommodate site grading, tie‐in of new asphalt pavement, water and sanitary connections, and landscape islands. A sign and large planter will also be removed at the site’s frontage. Proposed BMPs:  Street Sweeping*  Perimeter Control *  Portable Toilets  Sediment Control Logs  Vehicle Tracking Control  Concrete Washout Area *See below for maintenance schedule Phase II i. Grading Operations Clearing and grubbing to remove any existing vegetation at the east edge of the site will occur first. Topsoil will be stripped and stockpiled on site. Rough grading will then be completed for the garage addition at the east edge of the site. Final grading will be performed for ADA stall re‐grading and garage foundation prior to foundation construction. BMP’s are installed where and when applicable, dependent upon the phase of construction, prior to the beginning of grading operations. Proposed BMPs:  Vehicle Tracking Control *  Spill Prevention/Containment *  Street Sweeping *  Sediment Control Log  Perimeter Control * *See below for maintenance schedule 9 ii. Utility/Infrastructure Construction Wet utilities to be constructed on site include water, hydrant line, and sanitary sewer. All of which are private. New curb and gutter throughout the site for new parking islands and landscaped sections as well as a limited amount of concrete flatwork and asphalt repaving. Proposed BMPs:  Vehicle Tracking Control *  Site Stabilization *  Spill Prevention/Containment *  Concrete Washout Containment *  Street Sweeping *  Perimeter Control *  Sediment Control Log  Soil Stockpile *See below for maintenance schedule iii. Building Construction Vertical building expansion on the existing structure at the south central area of the site. New building construction at the northeast corner of the site. Proposed BMPs:  Vehicle Tracking Control *  Site Stabilization *  Spill Prevention/Containment *  Concrete Washout Containment *  Street Sweeping *  Perimeter Control *  Sediment Control Log  Soil Stockpile *See below for maintenance schedule iv. Landscaping/Site Stabilization On site landscaping consists of mulch, shrubs, trees, grass, and cobble. Temporary and permanent stabilization will be provided as necessary. Proposed BMPs:  Permanent Stabilization *  Spill Prevention/Containment *  Street Sweeping *  Perimeter Control *  Sediment Control Logs  Rock Socks *See below for maintenance schedule 10 D. Detailed Construction Schedule Please see Section 7.B above for construction scheduling. E. Spill Prevention and Management If fuel is stored on site, it will be stored in small quantities in designated areas out of the way of construction traffic and construction activities. Construction and building materials will be stored for short periods of time in relatively flat areas and covered when appropriate. Paints, fertilizers, and any other liquids or fine grained soluble substances capable of polluting stormwater discharge will be stored in the original containers in sheltered and secure locations until time of use. Material wastes will be properly disposed of at approved off‐site landfills. Concrete chute wash‐out sump areas will be provided on site for concrete truck washout waters. The sump will be dewatered by evaporation and percolation. F. Required Best Management Practices (BMP) Silt fence will be installed along property limits of construction where flows and sediment would impact adjacent properties. Paved surfaces will be swept in a timely manner when sediment and other materials are tracked or discharged onto them. Maintenance of erosion control measures shall comply with the criteria set forth in the Colorado Department of Public Health and Environmental Guidelines (Reference‐1). Site grading operation will begin when erosion control measures are in place. When necessitated by dry and windy conditions, fugitive dust will be controlled by watering exposed un‐vegetated areas. All structural practices will be inspected once every week and after significant precipitation events. Any degradation of structures described in the plan or excessive accumulation of sediments will be remedied immediately upon discovery. G. Construction Phasing Final grading will be completed before paving of the site. Landscaping and irrigation systems will be installed before final site stabilization. 8. Placement of Water Quality BMP’s Water Quality will be placed according to civil construction plans. During construction, Sediment Basins will be installed in grass swale area to aid in pollutant control. 9. Permanent Stabilization The permanent final stabilization of the site will include asphalt paving of the new parking areas, and landscaping of all areas exposed after paving operations have been completed. 10. BMP Maintenance “Approved erosion and sediment control ‘Best Management Practices’ shall be maintained and kept in good repair for the duration of this project. At a minimum, the Permittee or contractor shall produce and retain weekly written inspection records for all BMPs and after significant precipitation 11 events. All necessary maintenance and repair shall be completed immediately. Additionally, street sweeping is to be completed by the close of the business day or (and) on an as needed basis throughout the day. As the project expands, so will the monitoring of erosion control measures. This plan will implement the following general requirements for construction: i. The Engineer, Owner, and General Contractor, as well as representatives from governing agencies shall make routine checks of all erosion control measures (listed above) to determine if repairs or sediment removal are necessary. Due to conditions that may arise in the field, additional control measures may be determined to be necessary but they shall be reasonable and comply with standard engineering practices. ii. After each significant precipitation event, erosion control measures are to be checked. If repairs are needed, they shall be completed immediately. iii. At all times during construction, erosion and sediment control shall be furnished and maintained by the General Contractor. iv. During construction, all structural practices will be inspected once every week. Any degradation of structures described in the plan or excessive accumulation of sediments will be remedied immediately upon discovery. 12 REFERENCES 1. Colorado Department of Health & Environmental Guidelines, Denver, Colorado, May 1995. 2. Urban Storm Drainage Criteria Manual Volume 3, Colorado, March, 1969 (Updated January 2016). 3. Fort Collins Stormwater Criteria Manual, Fort Collins, Colorado, September, 2018 13 APPENDIX A. VICINITY MAP B. CONSTRUCTION GENERAL PERMIT C. STORMWATER CONSTRUCTION SITE INSPECTION REPORTS D. SWMP AMENDMENT LOG E. SPILL PREVENTION AND CONTROL PLAN F. CORRECTIVE ACTION REPORT G. EROSION CONTROL PLAN (CX) AND DETAILS (CX) All changes, addendums, additions, deletions and modifications to these drawings must be approved, in writing, by the Fort Collins-Loveland Water District and the South Fort Collins Sanitation District. Mr. Terry Farrill, P.E., District Engineer Date FORT COLLINS - LOVELAND WATER DISTRICT SOUTH FORT COLLINS SANITATION DISTRICT Total Disturbed Area= 0.85 acre Project: Disturbed Acres Seeded: 0.32 EROSION CONTROL BMPs Units Estimated Quantity Unit Price Total Price L.F. 496 $2.50 $1,240.00 EA 1 $500.00 $500.00 EA 1 $250.00 $250.00 EA 1 $5,000.00 $5,000.00 Sub-Total: $6,990.00 1.5 x Sub-Total: $10,485.00 Amount of security: $10,485.00 Total Acres x Price/acre: $1,407.89 $4,360.00 Sub-Total: $1,407.89 1.5 x Sub-Total: $2,111.84 Amount to Re-seed: $2,111.84 Minimum escrow amount: $3,000.00 Erosion Control Escrow: $10,485.00 Fields in yellow should be amended for this project. “The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid, whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three thousand dollars ($3,000) for commercial development” Concrete Washout (CW) (add all other BMPs for the site in this list) Final Escrow Amount Sediment Control Log Example Erosion and Sediment Control Escrow/Security Calculation for The City of Fort Collins BMP Amount Silt Fence (SF) Vehicle Tracking Control (VTC) Reseeding Amount Miniumum Escrow Amount Breeze Thru Headquarters Unit Price of Seeding per acre: 8/1/2018 10:54 AM N:\PLANNING LLC\375 Breeze Thru HQ bldg\Drainage\SWMP\375_Breeze Thru_Escrow Calculations.xls