Loading...
HomeMy WebLinkAboutSUN COMMUNITIES - THE FOOTHILLS - FDP220005 - SUBMITTAL DOCUMENTS - ROUND 4 - STORMWATER-RELATED DOCUMENTSPROJECT MANE: PROJECT NO: LOCATION: D 40% Impervious 2 yr = 0.50 5 yr = 0.50 10 yr = 0.50 100 yr = 0.50 100% Impervious 2 yr = 0.95 5 yr = 0.95 10 yr = 0.95 100 yr = 0.95 90% Impervious 2 yr = 0.95 5 yr = 0.95 10 yr = 0.95 100 yr = 0.95 2% Impervious 2 yr = 0.15 5 yr = 0.15 10 yr = 0.15 100 yr = 0.15 20% Impervious 2 yr = 0.20 5 yr = 0.20 10 yr = 0.20 100 yr = 0.20 COMPOSITE C CALCULATION NRCS Hydrologic Soil Group: Sun Communities - Fort Collins 19002763 Fort Collins, CO Gravel Asphalt, Concrete Rooftop Lawns, Sandy Soil, Avg Slope 2-7% Open Lands, Transistion BASIN Atotal Gravel Asphalt, Concrete Rooftop Lawns, Sandy Soil, Avg Slope 2-7% Open Lands, Transistion Atotal COMPOSITE C Percent ID (ft²) (ft²) (ft²) (ft²) (ft²) (ft²) (Ac) 2 yr 5 yr 10 yr 100 yr Impervious A9 204618 0 31175 55726 87242 30475 4.70 0.50 0.50 0.50 0.62 44% A10 29239 0 19247 0 9992 0 0.67 0.68 0.68 0.68 0.85 67% A11 58353 0 20929 15758 21666 0 1.34 0.65 0.65 0.65 0.82 61% A12 423204 0 6720 25350 125502 265632 9.72 0.24 0.24 0.24 0.30 20% OS6 183321 0 67579 62614 53128 0 4.21 0.72 0.72 0.72 0.90 68% OS7 729110 0 0 729110 0 0 16.74 0.95 0.95 0.95 1.00 90% B700 1627845 0 145650 888558 297530 296107 37.37 0.67 0.67 0.67 0.67 62% PROPOSED DRAINAGE AREA K:\19002763\Project Documents\Engineering-Planning-Power and Energy\Reports\Drainage\F_Reference Material\EPA-SWMM\Drainage Calculations with Inlet Capacity Designer: JMP Date: 11/23/2022, 2:21 PM