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1 <br /> ' Morrison Quarry Temporary Haul Road Drainage Analysis and Design Page 3 <br /> May 19, 2020 <br /> ' PROPOSED DRAINAGE SUMMARY TABLE <br /> Design Point DesignPoint <br /> Basin 5 Year 100 Year Design Point 5 year Peak 100 year <br /> ' Area Peak Flow Peak Flow Contributing Flow Peak Flow <br /> Basin ID (ac) (cfs) (cfs) Design Point Basins (cfs) (cfs) <br /> A 26.53 3.00 52.52 A A 3.00 52.52 <br /> B 0.21 0.18 0.60 B B 0.18 0.60 <br /> C 0.94 0.65 3.71 C A, B, C 3.83 56.83 <br /> D 0.50 0.38 1.98 D D 0.38 1.98 <br /> E 5.39 4.22 18.86 E E 4.22 18.86 <br /> ' F 0.27 0.23 0.76 F F 0.23 0.76 <br /> G 0.47 1.27 3.00 1G G 1.27 3.00 <br /> H 0.42 0.34 1.14 H H 0.34 1.14 <br /> 1 0.45 0.36 1.21 1 1 0.36 1.21 <br /> J 0.39 0.32 1.07 J J 0.32 1.07 <br /> K 0.33 0.27 0.92 K K 0.27 0.92 <br /> L 1 2.43 0.78 7.64 L G,L 2.05 10.64 <br /> M 1 10.49 1 2.12 27.60 M A-D, F-H, J, L, M 9.27 100.02 <br /> The riprap lined channels and plunge pools were designed using Autodesk Civil 3D <br /> Hydraflow software for flow capacity, and the "Rock Chute Design" spreadsheet based on <br /> ' "Design of Rock Chutes" by Robinson, Rice, Kadavy, ASAE, 1998, for riprap and plunge <br /> pool sizing. The 100-year peak flows from all contributing basins for each channel were <br /> used to size a "V" channel to convey the flows. Summaries of the channel, riprap, and <br /> ' plunge pool sizes and depths are below and on the Proposed Drainage Plan map. <br /> PROPOSED CHANNEL SUMMARY TABLE <br /> ' Channel Channel Channel Side Channel Riprap <br /> Channel ID Type Depth Slopes Top Width Riprap D50 Thickness <br /> Culvert A Outlet V-Channel 2 50 2:1 10 24 48 <br /> Basin B Outfall V-Channel 1.50 2:1 6 12 24 <br /> Culert C Outlet V-Channel 3.00 2:1 12 24 48 <br /> Basin D Outfall V-Channel 1.50 2:1 6 12 24 <br /> Basin E Roadside Varies 1.00 Vert,2 it Bottom,1.1 3 No Riprap No Riprap <br /> Basin E Outfall V-Channel 2.00 2:1 8 18 36 <br /> ' Basin F Outfall No Channel - - - -- - <br /> Basins H,I,J,K Outfalls V-Channel 1.50 2:1 6 12 24 <br /> Toe Channel-Basins G,L V-Channel 2.00 2:1 8 18 36 <br /> Toe Channel-Basins A-D, F-H,J,L,M V-Channel 4.00 2:1 16 30 60 <br /> ' PROPOSED PLUNGE POOL SUMMARY TABLE <br /> Dimension Dimension <br /> ' Depth L W Side <br /> Location (ft) (ft) (ft) Slopes <br /> Culert A Outlet 2 20 \varies 2:1 <br /> Culvert C Outlet 2 20 caries 2:1 <br /> ' Culert C Outlet Channel 2 30 10 2:1 <br /> Basin E Outfall Channel 2 20 4 2:1 <br /> Basin I Outfall Channel 2 10 4 2:1 <br /> Basin K Outfall Channel 2 10 4 21 <br /> Toe Channel 2 35 10 2:1 <br /> The Proposed Drainage Plan and Plunge Pool Details drawings, detailed % impervious, <br /> basin peak flow, culvert, channel, riprap, and plunge pool calculations, and soil data are <br /> ' attached. <br /> it 305 Denver Avenue-Suite D•Fort Lupton CO 80621 •Ph:303-857-6222•Fax:303-857-6224 <br />� i <br />