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Home My WebLink AboutDrainage Reports - 02/20/2020Final Drainage Report For Stodgy Brewing Co., LLC 1802 and 1804 Laporte Avenue, Fort Collins, Colorado AGPROfessionals 3050 67th Avenue, Suite 200 Greeley, CO 80634 (970) 535-9318 02/04/2020 City of Fort Collins Approved Plans Approved by: Date: Dan Mogen 02/20/2020 Stodgy Brewing Company, LLC ii Table of Contents Certifications ..................................................................................................................... 3 Introduction......................................................................................................................... 4 1. Location................................................................................................................... 4 2. Description of Property............................................................................................ 4 Drainage Basin and Sub-Basins.......................................................................................... 5 1. Major Basin Description.......................................................................................... 5 2. Sub-Basin Description............................................................................................. 5 Drainage Design Criteria .................................................................................................... 7 1. Development Criteria............................................................................................... 7 2. Four Step Process..................................................................................................... 7 3. Hydrological Criteria............................................................................................... 8 4. Hydraulic Criteria .................................................................................................... 8 Drainage Facility Design.................................................................................................... 9 1. General Concept....................................................................................................... 9 2. Specific Details........................................................................................................ 9 Conclusions....................................................................................................................... 10 1. Drainage Concept................................................................................................... 10 2. Compliance with Fort Collins Stormwater Criteria Manual.................................. 10 Erosion Control................................................................................................................. 11 1. Compliance with Erosion Control Criteria............................................................ 11 List of References............................................................................................................. 12 Appendices Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 4 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com Introduction 1. Location The proposed site is in part of the Southeast ¼ of the Northwest ¼ Section 10, Township 7 North, Range 69 West, of the 6th P.M., Larimer County, CO. This site is located on the north side of Laporte Avenue in Fort Collins, Colorado and directly across from Frey Avenue. Frey Subdivision and City Park North Subdivision are located directly south of the proposed development. Larimer County Canal Number 2 borders the east side of the proposed development. Salud Health Center borders the north and west side of the proposed site. A vicinity map is shown in Appendix A. 2. Description of Property The applicant is proposing the development of 1802 and 1804 Laporte Avenue into a small brewery which will include the brewery, taproom, patio seating, on-site customer parking, food truck parking, landscaping, and employee parking. The total property acreage is 1.19. The proposed site is currently zoned Limited Commercial (C-L). The existing site consists of a single-family residence located at 1804 Laporte Avenue, one multi-use building, with occupancy of F-2, B, and A-2 at 1802 Laporte Avenue, and a commercial building, occupancy B at 1800 Laporte Avenue (which is located on the 1802 Laporte Ave Parcel). The single-family residence currently located at 1804 Laporte Ave. is going to be torn down and used for customer parking. The other buildings will be kept and renovated. The multi-use building will be renovated and used for the brewery and taproom. The commercial building will remain on-site for brewery office use. The two buildings will be connected. The existing asphalt at the customer parking will remain and be trimmed to match the proposed site plan. Currently there are no stormwater features on-site. There is one main soil type: Nunn clay loam with 1 to 3 percent slope (see USDA-NRCS Custom Soil Resource Report in Appendix A). Larimer No. 2 irrigation canal borders the property on the east. Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 5 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com Drainage Basin and Sub-Basins 1. Major Basin Description The proposed site is in the West Vine Basin Master Drainage Plan. The proposed site is currently not located within a proposed improvement or flood control and water quality area. The West Vine Basin Plan with the project site labeled is shown in Appendix A. The site has slopes ranging from approximately zero to five percent predominately towards the south. The majority of the stormwater appears to flow south. Due to the dense vegetation, runoff is dissipated either by interception from the large trees and/or a velocity reduction in the sheet flow. A topographic map was downloaded from the United States Geological Survey (USGS) website and is shown in Appendix A. The owners are not aware of any previous drainage issues and there was no visible sign of any previous drainage issues on site. A Federal Emergency Management Administration (FEMA) map of the project area is included in Appendix A. The property is located on panel 08123C1575E and is not currently located within a 100-year floodplain. No off-site flows are anticipated. Off-site flows from the east are intercepted by the Larimer No. 2 irrigation canal. Off-site flows from the south are intercepted and diverted by Laporte Avenue. Topography to the north is flat and off-site flows from the north appear to flow east to northeast toward the Larimer No. 2 irrigation canal. Off-site flows from the west flow south and bypass the site. 2. Sub-Basin Description There are five sub-basin areas; Sub-basin A, Sub-basin B, Sub-basin C, Sub-basin D, and Sub-basin E that were considered for the drainage report. See the Drainage Plan for the Sub-basin delineation. Sub-basin A includes the customer parking area and the trash enclosure. The customer parking will include TrueGRID permeable pavers. For overall impervious calculations, the TrueGRID was assumed to be 40% impervious. The permeable pavers will replace the existing residence, pavement and gravel located at the 1804 Laporte Avenue address. The TrueGRID system with sub-base and underdrain will provide treatment for the proposed customer parking lot and trash enclosure. The underdrain is proposed on the east side of Sub-basin A. The underdrain connects to a 1’ diameter inlet which connects to a 4” solid pipe carrying flows to the east. Historically, Sub-basin A flowed toward the southeast. Historical flow patterns will be maintained. Sub-basin B is the proposed emergency access lane, handicap parking, entrance sidewalk, and the southwest corner of the existing building. The asphalt for the emergency access land and handicap parking is existing. The entrance sidewalk will be added at the existing grade. The entrance is elevated to meet requirements of the access design and prevents Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 6 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com flows from exiting through the access. Historical flow patterns will be maintained for Sub-basin B. Sub-basin C is the front deck area, employee parking and front lawn/landscaping. No proposed development will occur in Sub-basin C. The employee parking has been delineated on the map to meet parking space requirements. The existing area is gravel with a few weeds. The weeds and existing chain link fence will be removed but percent impervious are not changing and no grading will occur. Historical flow patterns are towards the south and will be maintained for Sub-basin C. Sub-basin D is the majority of the existing buildings and the northeast corner of the parcel that is densely vegetated. The existing deck/walkway that historically has been between the buildings will be removed and the buildings will be connected with a proposed conditioned hallway. Historically, Sub-basin D flows east and northeast. These historical flow patterns will be maintained. Sub-basin E is the sidewalk, parkway, and entrances. Sub-basin E sheet flows south to the curb and gutter on Laporte Avenue. Historically, Sub-basin E flowed toward the south. These historical flow patterns will be maintained and flows will be directed to the curb and gutter on Laporte Avenue. Sub-basin F is the right-of-way that includes the westbound lane of Laporte Avenue. The westbound lane of Laporte Avenue historically is relatively flat and flows northeast. The improvement of curb and gutter to this section of Laporte Avenue will direct flows from Sub-basin E and Sub-basin F east and will tie into Laporte Avenue drainage. Laporte Avenue was considered in the total site percent imperviousness but was not included in a sub-basin as the site drainage is not impacted by Laporte Avenue. Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 7 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com Drainage Design Criteria 1. Development Criteria The proposed site runoff was evaluated using the criteria set forth in the Fort Collins Stormwater Criteria Manual (FCSCM) and Urban Drainage and Flood Control District (UDFCD) Criteria Manual Volumes 1, 2, and 3. 2. Four Step Process The Four Step Process recommended by UDFCD and City of Fort Collins was utilized to reduce runoff volumes and minimize impacts on receiving waters from smaller, more frequently occurring events. Step 1. Employ Runoff Reduction Practices To reduce runoff peaks, volumes, and pollutant loads, Stodgy Brewing is proposing to implement the following: TrueGRID Pro Plus Pavers (TrueGRID Pavers) are proposed in the customer parking area. The TrueGRID Pro Plus Pavers are assumed at 40% impervious and will be gravel filled. The TrueGRID Paver System will filter stormwater through the subbase. An underdrain will be installed and direct flows to the curb and gutter of Laporte Avenue. Specifications are in Appendix B. No additional impermeable areas are being proposed. The existing site (excluding the proposed parking area that will use the TrueGRID Plus Pavers) will remain the same. The historical drainage pattern will be maintained. Step 2. Implement BMPs That Provide a WQCV with Slow Release The TrueGRID pavers will include an 8” subgrade with a 4” underdrain for treatment. The design of the TrueGRID paver system will reduce runoff and encourages infiltration. The subgrade acts as a filter for the precipitation falling directly on the surface of the parking lot, the trash enclosure and small portion of the existing pavement. The trash enclosure, concrete apron and small area of proposed asphalt south of the concrete apron will be routed through the TrueGRID pavers system. The site has existing and established vegetation around the site. The proposed development does not disturb any of the established vegetation on the eastern border, maintains the landscaped areas in front of the proposed brewery, and provides landscaped areas in the proposed customer parking area. Step 3. Stabilize Stream Larimer No. 2 Irrigation Canal borders the proposed site. Minimal run-off historically flows that direction. Vegetation bordering the canal includes large trees (cottonwoods and elms) and lilac bushes. This established vegetation will continue to promote stabilized banks on the canal and will be maintained and kept throughout the development process. This area is within the Natural Habitat Buffer Zone. Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 8 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com Step 4. Implement Site Specific and Other Source Control BMPs Site specific and other source control BMPs that will be implemented are: Trash enclosure is placed adjacent to the parking lot and is fully enclosed. It is not directly next to storm drains or surface water. 3. Hydrological Criteria From FCSCM Chapter 5, Hydrology Standards, Table 3.4-1. the IDF (Intensity Duration Frequency) Table was used to determine the 2 Year, 10 Year and 100 Year Peak Flow Rate. The Table is in Appendix A. Percentage of imperviousness was calculated for the existing site conditions and the proposed site using the recommended values from Table 4.1-3. Surface Type – Percent Impervious (FCSCM Chapter 5 Hydrology Standards). The overall percentage of imperviousness for the existing site is approximately 50 percent and for the proposed site is approximately 50 percent (see Percentage of Imperviousness Calculation in Appendix A). The project size and sub-basins are less than five acres, therefore the runoff calculations were computed using the Rational Method. Table 1 summarizes the existing conditions and proposed development flowrates for the sub-basins. Calculations are in Appendix A. The total site runoff was calculated by adding the run-off of the sub-basins. Since the majority of the sub-basins are independent of each other and time of concentrations are close, the sum of the run-off of each basin was used. Table 1: Peak Runoff Flowrates Proposed Existing Peak Runoff % Imperviousness 2 Year Peak Flowrate (cfs) 10 Year Peak Flowrate (cfs) 100 Year Peak Flowrate (cfs) % Imperviousness 2 Year Peak Flowrate (cfs) 10 Year Peak Flowrate (cfs) 100 Year Peak Flowrate (cfs) DB-A 30% 0.18 0.31 0.86 79% 0.27 0.46 1.17 DB-B 72%0.35 0.60 1.54 70%0.35 0.59 1.51 DB-C 15% 0.18 0.31 0.84 15% 0.18 0.31 0.84 DB-D 47%0.51 0.88 2.24 47%0.51 0.88 2.24 DB-E 60 % 0.28 0.48 1.22 36% 0.17 0.29 0.73 DB-F 100%0.30 0.51 1.30 84%0.26 0.44 1.13 Total Site Runoff 51%1.80 3.09 8.00 51%1.74 2.97 7.62 cfs = cubic feet per second 4. Hydraulic Criteria The proposed site is not significantly increasing the imperviousness. The proposed development is removing asphalt, gravel, and an existing building, and installing Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 9 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com TrueGRID permeable pavers. Since the site’s overall imperviousness area is not increasing by 1000 square feet or more, a detention pond is not proposed as stated in Chapter 1: Drainage Principles & Policies, 2.3.2 Detention Basin of the Fort Collins Stormwater Criteria Manual (FCSCM). Best Management Practices (BMPs) are proposed which include TrueGRID Permeable Pavers system. TrueGRID Pavers are proposed for the customer parking lot. The TrueGRID ProPlus Pavers are designed for commercial parking lots. For overall pervious calculations, the TrueGRID was assumed to be 40% impervious. The Manufacturer’s Product Specification Sheet is in Appendix B. 8” of subgrade is proposed under the TrueGRID Pavers to infiltrate into the native soils or draining through the underdrain. The underdrain is proposed on the east edge of the TrueGRID pavers. The underdrain will drain south toward the southern property boundary. There will be an inspection port at the southern end of the underdrain. The underdrain will be directed to a 4” PVC pipe and flow east under the main entrance. It will flow to a drainage swale for a short distance and then be directed to a sidewalk chase to the proposed curb and gutter on Laporte Avenue. For Laporte Avenue, the gutter on the westbound lane, located within the property boundary and in the right of way, will capture runoff from Sub-basin A, Sub-basin B, Sub-basin C, Sub-basin E and Sub-basin F. Having similar time of concentrations and conservatively assuming they will enter at the same point, the combined 2 year designed storm is 1.27 cfs. The 1.27 cfs can flow through the curb and gutter at a depth of approximately 0.2 feet (3 inches). Hydraflow Express Extension for AudoCAD Civil 3D was used to model the curb and gutter flow rate and is located in Appendix B. Drainage Facility Design 1. General Concept The proposed brewery and site development do not increase the percentage of imperviousness significantly. The proposed customer parking area is TrueGRID Permeable Pavers. The TrueGRID Pavers System treats stormwater falling on the customer parking area, the trash enclosure area and small amount of proposed asphalt. The site does not alter historic flows. A general drainage plan, drainage and erosion control plan, and drainage and erosion control details are shown in Appendix C. 2. Specific Details Installation and maintenance shall be in accordance with the manufacture’s technical specifications in Appendix B. Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 10 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com Conclusions 1. Drainage Concept Historical flow patterns and run-off amounts should be maintained in such a manner that should reasonably preserve the natural character of the area and prevent property damage of the type generally attributed to run-off rate and velocity increases, diversions, concentration and/or unplanned ponding of storm run-off for the 100-year storm event. The drainage design included in this report should be effective in treating the design storm runoff from the employee parking lot, trash enclosure and a portion of the existing asphalt. The remainder of the site will not increase the percentage of imperviousness, and historical flow patterns will be maintained. The Low Impact Development (LID) Requirements are met through the TrueGRID Paver System. 80% of the stormwater created by the proposed development is treated. See Appendix D with the LID Exhibit and Table 2 below. The customer parking area within the proposed utility easement was removed from the treated area (net treated area). Sub-basin E includes the development proposed in the right of way and sheet flows from north to south and away from the project site. The improvements and modification to Laporte Avenue are designed to direct stormwater east through the curb and gutter. It is not feasible to treat the stormwater generated from this area, as stormwater is directed away from the site and is in the right of way development area. This area is labeled as the R.O.W. Development on the LID Exhibit. Table 2: LID Treatment Summary Table Areas Total Sq. Ft. Total Developed Treated Area 6,251 Total Developed Untreated Area 856 Total On-Site Development 7,107 Developed Area in Utility Easement 937 Net Treated Area 5,695 % On-Site Treatment 80% R.O.W. Development 11,002 2. Compliance with Fort Collins Stormwater Criteria Manual The drainage design of Stodgy Brewing Company on Laporte Avenue is consistent with the Fort Collins Stormwater Criteria Manual, the West Vine Basin Plan, and all state and federal regulations governing stormwater discharge. The proposed site does not have a mapped 100-year floodplain. Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 11 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com Erosion Control 1. Compliance with Erosion Control Criteria The site is developing over 10,000 square feet but under 1 acre. A Grading and Erosion Plan is included in the Utility Plan set. The Erosion and Sediment Control Plan is consistent with the Fort Collins and State of Colorado’s Stormwater Criteria Manual. Erosion control plans and details can also be seen in Appendix C. Stodgy Brewing Company, LLC 02/04/2020 Final Drainage Report Page 12 of 12 AGPROfessionals, 3050 67th Avenue, Suite 200, Greeley CO 80634 * 970-535-9318 * www.agpros.com List of References Autodesk, Inc. Hydraflow Express Extension for Civil 3D 2013. Computer Software, Hydraflow Express Vers. 10. City of Fort Collins. “West Vine Basin.” Selected Plan-Water Quality & Habitat Improvements. Icon Engineering, Inc. Web. 8 August 2019. <https://www.fcgov.com/utilities/img/site_specific/uploads/West_Vine.pdf?1343238085 >. City of Fort Collins. “Fort Collins Stormwater Criteria Manual.” December 2018. Web. 31 July, 2019. <https://www.fcgov.com/utilities//img/site_specific/uploads/fcscm-cover- page-contents-and-preface.pdf?1549566343>. Federal Emergency Management Agency. "FEMA Flood Map Service Center." FEMA Flood Map Service Center. FEMA, 2 May 2012. Web. 31 July, 2019. <https://msc.fema.gov/portal>. Larimer County IT, Enterprise GIS. “Land Information.” Search by Map. Larimer County. Web. 12 August 2019. <https://maps1.larimer.org/gvh/?Viewer=LIL&run=Theme&theme=Land%20Informatio n&run=Parcel&parcel=> United States Department of Agriculture - Natural Resources Conservation Service. "Web Soil Survey." Web Soil Survey. USDA - NRCS, 2006. Web. 31 July, 2019 <http://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx>. United States Geological Survey. “Maps.” Overview - Maps, United States Geological Survey. USGS, 2016. Web. 12 August 2019. <www.usgs.gov/products/maps/topo- maps>. Urban Drainage and Flood Control District. Peak Runoff Prediction by the Rational Method. Computer software. Software. Vers. 2.00. <http://udfcd.org/software>. Urban Drainage and Flood Control District. "Urban Storm Drainage Criteria Manual Volume 1." USDCM: Volume 1 Management, Hydrology and Hydraulics. UDFCD, Aug. 2018. Web. 12 August 2019. <http://udfcd.org/volume-one>. Urban Drainage and Flood Control District. "Urban Storm Drainage Criteria Manual Volumes 2." USDCM: Volume 2 Structures, Storage and Recreation. UDFCD, September 2017. Web. 12 August 2019. <http://udfcd.org/volume-two>. Urban Drainage and Flood Control District. "Urban Storm Drainage Criteria Manual Volumes 3." USDCM: Volume 3 Stormwater Quality. UDFCD, April 2018. Web. 29 Nov. 2018. <http://udfcd.org/volume-three>. Stodgy Brewing Company, LLC Appendices A. Hydrologic Computations a. Vicinity Map b. USDA-NRCS Soil Report c. West Vine Basin Plan d. USGS Topographic Map e. FEMA FIRMette Map f. FCSCM IDF Table g. Percentage of Imperviousness h. UD Rational Runoff Calculations B. Hydraulic Computations a. TrueGRID Permeable Paver Product Specification Sheet b. Laporte Avenue Gutter Calculations C. 24 x 36 Maps a. General Drainage Plan b. Drainage and Erosion Control Plan c. Drainage and Erosion Control Details D. LID Treatment Exhibit Stodgy Brewing Company, LLC APPENDIX A Hydrologic Computations Vi ity Map This map was created by Larimer County GIS using data from multiple sources for informal purposes only. This map may not reflect recent updates prior to the date of printing. Larimer County makes no warranty or guarantee concerning the completeness, accuracy, or reliability of the content represented.Date Prepared: 8/12/2019 9:54:20 AM Miles0.1 0.1 12,000 0 Legend 1: Notes Scale Tax Parcels PLSS Township and Range PLSS Sections PLSS Quarter Sections Railroads Rivers and Streams County Boundary Rocky Mountain National Park Incorporated Areas City or Town OVERLAND TRL TAFT HILL RD SHIELDS ST . ... .... .... .. . . .. . . . .. . . ... . ... . . ....... ... . . ... .... .. ... ..... .... .... ..... .. .. ... .. .. ... . ...... ..... .. .. .... ... ..... ..... ... ... .. .. .... . . . .. .. ... ...... ..... . . .. .... .... .... . ... ... . . .......... ....... ..... ....... ... . ... . . . ......... ... . . .... .... .. ... . . ... ..... ..... ... .. .... ... ... . . . ...... ...... .. .... . .... ..... . ..... . .. . ... . ... . .... .. ... .. .. .. .. ... ... ... . .. . . .. . .. . . . . ... .. .. ......... . ........ ' #!" 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A metadata file associated with this product is draft version 0.6.19 CONTOUR INTERVAL 10 FEET NORTH AMERICAN VERTICAL DATUM OF 1988 SCALE 1:24 000 1000 500 0 METERS 1000 2000 21KILOMETERS00.51 1 0.5 0 MILES 1 1000 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 FEET Imagery..................................................NAIP, July 2013 Roads................................ U.S. Census Bureau, 2015 - 2016 Names..........................................................GNIS, 2016 Hydrography....................National Hydrography Dataset, 2013 Contours............................National Elevation Dataset, 2001 Boundaries............Multiple sources; see metadata file 1972 - 2016 Public Land Survey System..................................BLM, 2011 Wetlands.........FWS National Wetlands Inventory 1977 - 2014 North American Datum of 1983 (NAD83) World Geodetic System of 1984 (WGS84). Projection and 1 000-meter grid: Universal Transverse Mercator, Zone 13T Produced by the United States Geological Survey 10 000-foot ticks: Colorado Coordinate System of 1983 (north zone) This map is not a legal document. Boundaries may be generalized for this map scale. Private lands within government reservations may not be shown. Obtain permission before entering private lands. U.S. National Grid 100,000-m Square ID Grid Zone Designation DE 13T ^ GN UTM GRID AND 2016 MAGNETIC NORTHDECLINATION AT CENTER OF SHEET 0° 2´ 1 MILS 8° 32´ 152 MILS NS N . 7 6 4 3 0 1 6 3 5 8 8 6 9 NG A R E F N O . U S G S X 2 4 K 1 5 8 7 5 105°6'49.94"W 105°6'12.48"W Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design None None None 0% 0% 0% Roofs % Impervious 90% None 0% 0% 0% 0% Asphalt, Concrete Lawns, clayey soil None None None None 2769-02 11/21/19 12:49 PM AGPROfessionals CTV Impervious Area Calculation Existing None None Gravel Road Ditch None Total SqFt Acres Impervious 100% 2% 40% 10,822 12,281 16,974 9,741 0.22 0.28 0.01 0.09 0.00 0% 0% 0% 0% 0% 0.001,829 0.00 0.00 0.00 0.00 51% 0.00 0.00 0.00 0.00 51,647 0.60 0.00 0.00 26,257 51,647 Acres 1.19 0.60 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design None None None 0% 0% 0% Roofs % Impervious 90% None 0% 0% 0% 0% Asphalt, Concrete Lawns, clayey soil None None None None 2769-02 11/21/19 12:50 PM AGPROfessionals CTV Impervious Area Calculation Proposed None None Gravel Road Ditch None Total SqFt Acres Impervious 100% 2% 40% 8,038 15,929 18,839 7,201 0.17 0.37 0.01 0.07 0.00 0% 0% 0% 0% 0% 0.001,829 0.00 0.00 0.00 0.00 51% 0.00 0.00 0.00 0.00 51,836 0.61 0.00 0.00 26,421 51,836 Acres 1.19 0.61 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to 5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.18 0.31 None 8.55 8.54 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 2,338 Acres 0.05 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers None None 2769-02 11/21/19 12:46 PM AGPROfessionals CTV DB-A (Proposed) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 000.00 0.00 0.00 0.05 0.95 0.00 0.95 0.25 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0 2,101 5,740 100% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0% 0% 0% 0% 0% 2% 40% 0% 0% 0 525 2870 0 0 0 0 0.43 0.54 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0 3395 0.43 0.00 7,841 0.18 30% 7,841 0.05 0.00 1.9 72 10.40 7.16 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.40 8.55 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 100-year 7.16 7.16 0.86 2.30 8.80 0.43 10-year 8.55 8.54 0.00 10.40 8.55 3.93 0.00 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to 5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.27 0.46 None 3.46 3.45 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 3,923 Acres 0.09 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers None None 2769-02 11/20/19 2:12 PM AGPROfessionals CTV DB-A (Existing) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 22002,316 0.05 0.03 0.00 0.01 0.95 0.00 0.95 0.25 0.00 0.00 0.00 0.00 0.50 0.00 0.00 1,313 0 1,313 100% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0% 0% 0% 0% 0% 2% 40% 0% 0% 1247 0 657 0 0 0 0 0.83 1.04 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0 4104 0.83 0.00 4,942 0.11 79% 4,942 0.09 0.00 1.9 72 10.40 5.00 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.40 5.00 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 100-year 0.80 0.79 1.17 2.85 9.95 0.83 10-year 3.46 3.45 0.00 10.40 5.00 4.87 0.00 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.35 0.60 None 5.01 5.01 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 5,042 Acres 0.12 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers None None 2769-02 11/21/19 12:47 PM AGPROfessionals CTV DB-B (Proposed) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 19992,104 0.04 0.07 0.00 0.00 0.95 0.00 0.95 0.25 0.00 0.00 0.00 0.00 0.50 0.00 0.00 3,113 1,753 0 100% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0% 0% 0% 0% 0% 2% 40% 0% 0% 2957 438 0 0 0 0 0 0.77 0.97 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0 5394 0.77 0.00 6,970 0.16 72% 6,970 0.12 0.00 2.8 134 10.74 5.00 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.74 5.01 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 100-year 2.04 2.04 1.54 2.85 9.95 0.77 10-year 5.01 5.01 0.00 10.74 5.01 4.87 0.00 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.35 0.59 None 5.23 5.22 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 4,892 Acres 0.11 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers None None 2769-02 11/20/19 2:24 PM AGPROfessionals CTV DB-B (Existing) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 21232,235 0.05 0.07 0.00 0.00 0.95 0.00 0.95 0.25 0.00 0.00 0.00 0.00 0.50 0.00 0.00 2,843 1,892 0 100% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0% 0% 0% 0% 0% 2% 40% 0% 0% 2701 473 0 0 0 0 0 0.76 0.95 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0 5297 0.76 0.00 6,970 0.16 70% 6,970 0.11 0.00 2.8 134 10.74 5.00 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.74 5.23 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 100-year 2.31 2.30 1.51 2.85 9.95 0.76 10-year 5.23 5.22 0.00 10.74 5.23 4.87 0.00 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to 5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.84 2.52 9.31 0.34 10-year 6.98 6.98 0.00 10.53 6.98 4.31 0.00 10.53 6.19 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.53 6.98 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 100-year 6.19 6.19 0.21 15% 9,148 0.03 0.00 7.7 95 0.34 0.43 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0 3146 0.34 0.00 9,148 0% 0% 43 1718 815 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.00 45 6,873 1,630 100% 0% 0% 0% 0% 0% 2% 40% 0.00 0.00 0.01 0.95 0.000 0.95 0.25 0.00 0.00 2769-02 11/21/19 12:47 PM AGPROfessionals CTV DB-C (Proposed & Existing) No grading proposed Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 5706000.01 Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers Ditch None 0.18 0.31 None 6.98 6.98 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 1,374 Acres 0.03 0% 0% 0% 0% 0% Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to 5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.51 0.88 None 4.98 4.97 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 6,196 Acres 0.14 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers Ditch None 2769-02 11/20/19 2:52 PM AGPROfessionals CTV DB-D (Proposed and Existing) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 50675,334 0.11 0.01 0.00 0.01 0.95 0.000 0.95 0.25 0.00 0.00 0.00 0.00 0.50 0.00 0.00 638 5,477 1,619 100% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0% 0% 0% 0% 0% 2% 40% 0% 0% 606 1369 810 0 0 0 0 0.60 0.75 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0 7852 0.60 0.00 13,068 0.30 47% 13,068 0.14 0.00 5 83 10.46 5.00 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.46 5.00 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 100-year 3.48 3.48 2.24 2.85 9.95 0.60 10-year 4.98 4.97 0.00 10.46 5.00 4.87 0.00 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to 5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.26 0.44 None 2.03 2.03 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 4,002 Acres 0.09 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers Ditch None 12/2/19 12:52 PM AGPROfessionals CTV DB-F (Existing) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 000.000.95 0.000 0.95 0.25 0.00 0.00 2769-02 100% 0% 0% 0% 0% 0% 2% 40% 0.08 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.00 1,316 3302 0 658 0 0 0 0 0.00 0.00 3,476 0 0 3960 0.83 0.00 4,792 0% 0% 0.00 0.00 0.00 0.00 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0.11 84% 4,792 0.09 0.00 2 25 0.83 1.03 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.14 5.00 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 1.13 2.85 9.95 0.83 10-year 2.03 2.03 0.00 10.14 5.00 4.87 0.00 10.14 5.00 100-year 0.50 0.50 Project Number: Date: 3050 67th Avenue, Suite 200 Designed By: Sheet: of Greeley, CO 80634 Checked By: Telephone (970) 535-9318 Subject: www.agpros.com =User Entry Solving for the Percent Impervious (I): Description per UDFCD Table 6-3 Square Feet Total Impervious Acres Total Development Acres Development %I Actual Design Composite Runoff Coefficient 2-year Composite Runoff Coefficient (Cf=1.00) 10-year Composite Runoff Coefficient (Cf=1.00) 100-year Composite Runoff Coefficient (Cf=1.25) (area/wetted perimeter) Time of Concentration (Tc=Ti+Tt) Overland Flow Time of Concentration (minutes) Channelized Flow Time of Concentration (minutes) Maximum Tc Allowed (L/180 +10) Total Time of Concentration* *If Tc is less than 5 minutes, Tc is equal to 5 minutes Intensity (in/hr) Table 3.4-1 Flow Rate (cfs) Q=ciA 0.30 0.51 None 1.12 1.11 2-year Overland Slope (percent) Overland Length (ft) Channelized Roughness Coefficient (manning's n) 0.00 4,791 Acres 0.11 0% 0% 0% 0% 0% Asphalt, Concrete Lawns, Clayey Soil, Avg Slope 2-7% None None None None None None None None None Gravel/Pavers Ditch None 12/2/19 4:44 PM AGPROfessionals CTV DB-F (Proposed) Roofs % Impervious 90% Total SqFt Acres Impervious Runoff Coefficient Coefficient x Area (SqFt) 000.000.95 0.000 0.95 0.25 0.00 0.00 2769-02 100% 0% 0% 0% 0% 0% 2% 40% 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0 4551 0 0 0 0 0 0 0.00 0.00 4,791 0 0 4551 0.95 0.00 4,791 0% 0% 0.00 0.00 0.00 0.00 0 0 0 0 00.00 0.00 0.00 0.00 0.00 0.00 0 0 0.11 100% 4,791 0.11 0.00 2 25 0.95 1.19 Channelized Velocity (ft/sec) 0.00 Length of channel (feet) 0 10.14 5.00 0.15 Hydraulic Radius (feet) 0 Longitudinal Slope (feet/feet) 0 1.30 2.85 9.95 0.95 10-year 1.12 1.11 0.00 10.14 5.00 4.87 0.00 10.14 5.00 100-year -0.65 -0.65 Stodgy Brewing Company, LLC APPENDIX B Hydraulic Computations 1-855-355-GRID (4743) Page 1 TRUEGRID Pavers: 2500 Summer St., # 3225, Houston, TX 77007 TRUEGRID® PRO Plus Product Specification Sheet Dimensions: Pre-Assembled: Cell Width:3- Weight:5.22 lbs Permeability:100% w/clean, uniform stone Product Porosity:90% open Compressive strength:Over 8000 psi filled Material:Recycled High Density Polyethylene (100% post-consumer) Color:Black with UV Stabilizer Temperature Range:Dimensionally Stable for -58F to 194F Moisture Absorption:.01% Environmental Compatibility:Nontoxic, harmless to plants, animals, and microorganisms. Inert material, groundwater neutral Installation Speed:1000 sq/ft per man hour Other features of TRUEGRID Highly resistant to oils, gasoline, acids, salt, ammonia, and alcohol May be saw cut Patented design yields ultimate hoop strength Circular elements provide multi-directional crush and shear strength Flexible links allow expansion and contraction depending on environmental conditions Built in X-Anchors allows weight of filler to hold grid down without any extra staking Interlocking connectors 1-855-355-GRID (4743) Page 2 TRUEGRID Pavers: 2500 Summer St., # 3225, Houston, TX 77007 Ground Preparation: Depends upon site condition and local conditions. Suggested Sub-base:3/4 Depth of this layer should be a minimum of 6 - 8 Deeper for heavier loads. For additional drainage, increase depth of sub-base. Class 2 road base (crushed concrete) is also a typical sub-base material. Gravel/sandy soil mix (60/40) is also common for grass fill applications. Level sub-base before laying TrueGrid. Installation:Layout and snap together pre-assembled sheets. (4 pcs per layer = 16 sq/ft) If body weight does not level the grids, use plate vibrator or heavy cylinder to level. Backfill:Any angular or round medium may be used. Fill cells with filler of choice. typical. TRUEGRID may be cut on site Pre-cutting is not required Angle grinder, circular saw, compass saw, or handsaw are all options for cutting TRUEGRID. Delivery: Pallet content:800 sq/ft = 50 layers per pallet = 200 pcs Pallet dimensions: Approximate pallet weight:1,050 lbs Truckload:24 pallets or 19,200 sq/ft For more info on TRUEGRID Please visit our website: www.truegridpaver.com Channel Report Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc. Monday, Dec 2 2019 Laporte Avenue Gutter Gutter Cross Sl, Sx (ft/ft) = 0.020 Cross Sl, Sw (ft/ft) = 0.080 Gutter Width (ft) = 2.00 Invert Elev (ft) = 5053.72 Slope (%) = 1.00 N-Value = 0.012 Calculations Compute by: Known Q Known Q (cfs) = 1.27 Highlighted Depth (ft) = 0.23 Q (cfs) = 1.270 Area (sqft) = 0.42 Velocity (ft/s) = 3.05 Wetted Perim(ft) = 5.69 Crit Depth, Yc (ft) = 0.28 Spread Width (ft) = 5.45 EGL (ft) = 0.37 0 2 4 6 8 10 12 14 16 18 20 22 24 Elev (ft) Depth (ft)Section 5053.00 -0.72 5053.50 -0.22 5054.00 0.28 5054.50 0.78 5055.00 1.28 Reach (ft) Stodgy Brewing Company, LLC APPENDIX C 24 x 36 Maps Stodgy Brewing Company, LLC APPENDIX D LID Treatment Exhibit PROPERTY BOUNDARY 3050 67th Avenue, Suite 200, Greeley, CO 80634 (970) 535-9318 fax: (970) 535-9854 DATE LAST SAVED: October 3, 2019 DATE: November 22, 2019DRAWN BY: AGPRO REVISIONS: R1 R2 R3 R4 R5 N STODGY BREWING CO., LLC LID TREATMENT EXHIBIT --/--/-- --/--/-- --/--/-- --/--/-- --/--/-- DESC. DESC. DESC. DESC. DESC.FT COLLINS, CO