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HomeMy WebLinkAboutCSU LAKE AND PROSPECT PARKING LOT SITE PLAN ADVISORY REVIEW - SPA190001 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER-RELATED DOCUMENTSStormwater Facility Name: Facility Location & Jurisdiction: User Input: Watershed Characteristics User Defined User Defined User Defined User Defined Watershed Slope = 0.020 ft/ft Stage [ft] Area [ft^2] Stage [ft] Discharge [cfs] Watershed Length = 375 ft 0.00 3 0.00 0.00 Watershed Area = 1.28 acres 0.10 33 0.10 0.02 Watershed Imperviousness = 61.0% percent 0.20 97 0.20 0.02 Percentage Hydrologic Soil Group A = 0.0% percent 0.40 553 0.40 0.02 Percentage Hydrologic Soil Group B = 100.0% percent 0.60 1,271 0.60 0.02 Percentage Hydrologic Soil Groups C/D = 0.0% percent 0.70 1,545 0.70 0.02 0.80 1,762 0.80 0.02 User Input 17 0.90 1,948 0.90 0.02 1.00 2,124 1.00 0.02 1.10 2,290 1.10 0.02 1.20 2,449 1.20 0.02 WQCV Treatment Method = hours 1.30 2,597 1.30 0.02 1.40 2,736 1.40 0.02 1.50 2,872 1.50 0.02 1.60 3,003 1.60 0.02 1.70 3,126 1.70 0.02 1.80 3,245 1.80 0.02 1.90 3,367 1.90 0.02 2.00 3,494 2.00 0.02 2.10 3,626 2.10 0.02 2.20 3,764 2.20 0.02 2.30 3,907 2.30 0.02 2.40 4,055 2.40 0.02 2.50 4,213 2.50 0.02 2.60 4,385 2.60 0.02 2.70 4,579 2.70 0.02 2.80 4,792 2.80 120.00 3.10 4,792 3.10 120.00 After completing and printing this worksheet to a pdf, go to: https://maperture.digitaldataservices.com/gvh/?viewer=cswdif create a new stormwater facility, and attach the pdf of this worksheet to that record. Routed Hydrograph Results Design Storm Return Period = WQCV 2 Year 5 Year 10 Year 50 Year 100 Year One-Hour Rainfall Depth = 0.53 0.88 1.16 1.46 2.91 3.06 in Calculated Runoff Volume = 0.052 0.072 0.102 0.242 0.270 acre-ft OPTIONAL Override Runoff Volume = acre-ft Inflow Hydrograph Volume = 0.051 0.072 0.101 0.242 0.270 acre-ft Time to Drain 97% of Inflow Volume = 37.2 52.0 73.2 110.0 109.3 hours Time to Drain 99% of Inflow Volume = 37.9 53.1 74.7 113.5 113.3 hours Maximum Ponding Depth = 1.46 1.76 2.13 2.70 2.70 ft Maximum Ponded Area = 0.06 0.07 0.08 0.11 0.11 acres Maximum Volume Stored = 0.048 0.069 0.098 0.151 0.151 acre-ft Location for 1-hr Rainfall Depths (use dropdown): Workbook Protected Worksheet Protected Stormwater Detention and Infiltration Design Data Sheet Lake Street Pond Fort Collins, CO Lake St Pond Infiltration.xlsm, Design Data 2/19/2019, 6:41 PM WQCV_Trigger = 1 RunOnce= 1 CountA= 1 Draintime Coeff= 1.0 0 1 2 3 #N/A #N/A 0 1 2 3 #N/A #N/A Check Data Set 1 Check Data Set 1 Area Discharge Stormwater Detention and Infiltration Design Data Sheet 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0.1 1 10 FLOW [cfs] TIME [hr] 100YR IN 100YR OUT 50YR IN 50YR OUT 10YR IN 10YR OUT 5YR IN 5YR OUT 2YR IN 2YR OUT WQCV IN WQCV OUT 0 0.5 1 1.5 2 2.5 3 0.1 1 10 100 PONDING DEPTH [ft] DRAIN TIME [hr] 100YR 50YR 10YR 5YR 2YR WQCV Lake St Pond Infiltration.xlsm, Design Data 2/19/2019, 6:41 PM