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HomeMy WebLinkAboutNEW BELGIUM BREWERY - OVERALL DEVELOPMENT PLAN - 1-95C - SUBMITTAL DOCUMENTS - ROUND 2 - STORMWATER-RELATED DOCUMENTS100.00 2.08 4.30 0.42 3.88 105.00 2.02 4.39 0.44 3.95 110.00 1.96 4.46 0.46 4.01 115.00 1.91 4.53 0.48 4.05 120.00 1.85 4.58 0.50 4.09 125.00 1.74 4.49 0.52 3.97 130.00 1.63 4.38 0.54 3.84 135.00 1.52 4.24 0.56 3.68 140.00 1.41 4.08 0.58 3.49 145.00 1.30 3.89 0.60 3.29 150.00 1.19 3.69 0.62 3.06 THE REQUIRED POND SIZE = 4.085743 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 120 MINUTES DETENTION POND SIZING BY FAA METHOD Developed by Civil Eng. Dept., U. of Colorado Supported by Denver Metro Cities/Counties Pool Fund Study Denver Urban Drainage and Flood Control District, Colorado PROJECT TITLE: NBB ODP West Basin **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = West BASIN AREA (acre)= 14.87 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS DESIGN RETURN PERIOD (YEARS) = 100.00 INTENSITY (IN/HR)-DURATION (MIN) TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.9 7.7 5.6 4.5 3.7 3.2 2.9 2.4 2.1 1.9 1.2 1.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE,RATE = 3.02 CFS OUTFLOW ADJUSTMENT FACTOR = 1 AVERAGE RELEASE RATE = 3.02 CFS AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR. ***** COMPUTATION OF POND SIZE RAINFALL RAINFALL INFLOW OUTFLOW REQUIRED DURATION INTENSITY VOLUME VOLUME STORAGE MINUTE INCH/HR ACRE -FT ACRE -FT ACRE -FT ----------------------------------------------------- 0.00 0.00 0.00 0.00 0.00 5.00 9.95 1.03 0.02 1.01 10.00 7.72 1.59 0.04 1.55 15.00 6.66 2.06 0.06 2.00 20.00 5.60 2.31 0.08 2.23 25.00 5.06 2.61 0.10 2.51 30.00 4.52 2.80 0.12 2.68 35.00 4.13 2.99 0.15 2.84 40.00 3.74 3.09 0.17 2.92 45.00 3.49 3.24 0.19 3.05 50.00 3.23 3.34 0.21 3.13 55.00 3.05 3.46 0.23 3.23 60.00 2.86 3.54 0.25 3.29 65.00 2.74 3.68 0.27 3.41 70.00 2.62 3.79 0.29 3.50 75.00 2.50 3.87 0.31 3.56 80.00 2.38 3.93 0.33 3.60 85.00 2.31 4.05 0.35 3.69 90.00 2.23 4.15 0.37 3.77 95.00 2.16 4.23 0.40 3.83 100.00 2.08 8.68 0.84 7.84 105.00 2.02 8.86 0.88 7.98 110.00 1.96 9.02 0.92 8.10 115.00 1.91 9.16 0.96 8.19 120.00 1.85 9.27 1.00 8.26 125.00 1.74 9.08 1.05 8.03 130.00 1.63 8.84 1.09 7.76 135.00 1.52 8.56 1.13 7.43 140.00 1.41 8.24 1.17 7.07 145.00 1.30 7.87 1.21 6.65 150.00 1.19 7.45 1.26 6.19 THE REQUIRED POND SIZE = 8.260458 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 120 MINUTES DETENTION POND SIZING BY FAA METHOD Developed by Civil Eng. Dept., U. of Colorado Supported by Denver Metro Cities/Counties Pool Fund Study Denver Urban Drainage and Flood Control District, Colorado PROJECT TITLE: NBB ODP East Basin **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = East BASIN AREA (acre)= 30.05 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS DESIGN RETURN PERIOD (YEARS) = 100.00 INTENSITY (IN/HR) -DURATION (MIN) TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.9 7.7 5.6 4.5 3.7 3.2 2.9 2.4 2.1 1.9 1.2 1.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = 6.08 CFS OUTFLOW ADJUSTMENT FACTOR = 1 AVERAGE RELEASE RATE = 6.08 CFS AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR. ***** COMPUTATION OF POND SIZE ----------------------------------------------------- RAINFALL RAINFALL INFLOW OUTFLOW REQUIRED DURATION INTENSITY VOLUME VOLUME STORAGE MINUTE INCH/HR ACRE -FT ACRE -FT ACRE -FT ----------------------------------------------------- 0.00 0.00 0.00 0.00 0.00 5.00 9.95 2.08 0.04 2.03 10.00 7.72 3.22 0.08 3.14 15.00 6.66 4.17 0.13 4.04 20.00 5.60 4.67 0.17 4.51 25.00 5.06 5.28 0.21 5.07 30.00 4.52 5.66 0.25 5.41 35.00 4.13 6.03 0.29 5.74 40.00 3.74 6.24 0.33 5.91 45.00 3.49 6.55 0.38 6.17 50.00 3.23 6.74 0.42 6.32 55.00 3.05 6.99 0.46 6.53 60.00 2.86 7.16 0.50 6.66 65.00 2.74 7.43 0.54 6.89 70.00 2.62 7.65 0.59 7.07 75.00 2.50 7.83 0.63 7.20 80.00 2.38 7.95 0.67 7.28 85.00 2.31 8.18 0.71 7.47 90.00 2.23 8.38 0.75 7.62 95.00 2.16 8.54 0.80 7.75 North Star �.ftm„ design TRANSMITTAL SHEET To: FROM: Glen Schlueter Patricia Kroetch COMPANY: DATE: City of Fort Collins Stormwater 4/13/01 RE: YOUR REFERENCE NUMBER: New Belgium Brewery ODP 110-06 ❑ URGENT 0 FOR REVIEW ❑ PLEASE COMMENT ❑ PLEASE REPLY ❑ PLEASE RECYCLE NOTES/COMMENTS: Glen, Attached are the preliminary pond sizing calculations revised to use a runoff coefficient of 1.0. Please replace the calculations in the previous report with these sheets. Call if you have questions. `c ou 700 AUTOMATION DRIVE, UNIT I WINDSOR, CO 80550 PHONE: 970-686-6939 FAX: 970-686-1188