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HomeMy WebLinkAboutHARMONY TECHNOLOGY PARK-CELESTICA - ODP - 12-97 - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTCharts and Tables IJ ,� t c� s 4 ,,;;; t: ,.: 0.98 1 0.96 o. 4 0.94 w .w 0.92 0. .0.9 . 0.88 0.86 0 0.84 0.82 n , 1 , U U. I U.L U..") ` ` '` U.4 U. U.b U. / (Q peak' out%Q •'peak in Ratio Figure 1. Outflow".rate adjustment factor for.FAA Method MR J. ..... .. ..: ..... rs:..•...rr>.. .. .__ ... .. �..: ..: .. �.,.. :. ........:...�..ao^uusd.wna+w�%pcwclMiK�t9ALT]tAFRav:\[DF•Nas-•�_ . ¢':�a:pr:.. .. ...c. _ s.luo... }.. .d.e,. .n� .,.. ._ .. a_4: ...::>. . ***** GEOMETRIES OF AN EQUIVALENT CIRCULAR POND STAGE CONTOUR CONTOUR POND POND (DEPTH) DIAMETER AREA SIDE SLP STORAGE FEET FEET ACRE FT/FT ACRE -FT 0.00 166.53 0.50 3.00 0.00 0.50 169.53 0.52 3.00 0.25 1.00 172.53 0.54 3.00 0.52 1.50 175.53 0.56 3.00 0.79 2.00 178.53 0.57 3.00 1.07 2.50 181.53 0.59 3.00 1.37 3.00 184.53 0.61 3.00 1.67 3.50 187.53 0.63 3.00 .1.98 4.00 190.53 0.65 3.00 2.30 4.50 193.53 0.68 3.00 2.63 5.00 196.53 0.70 3.00 2.98 5.50 199.53 0.72 3.00 3.33 6.00 202.53 0.74 3.00 3.70 6.50 205.53 0.76 3.00 4.07 7.00 208.53 0.78 3.00 4.46 7.50 211.53 0.81 3.00 4.85 3.00 4.46 7.50 211.53 1 ***** 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 9.00 0.96 0.00 0.96 10.00 7.20 1.54 0.01 1.53 -; 15.00 6.20 1.98 0.01 1.97 20.00 5.20 2.22 0.02 2.20 25.00 4.70 2.51 0.02 2.49 30.00 35.00 4.20 3.85 2.69 2.87 0.02 0.03 2.66 2.85 40.00 3.50 2.98 0.03 2.95 45.00 3.25 3.12 0.04 3.08 50.00 3.00 3.20 0.04 3.16 55.00 2.80 3.28 0.04 3.24 60.00 2.60 3.33 0.05 3.28 ' 65.00 2.47 3.43 0.05 3.38 70.00 2.35 3.51 0.05 3.45 ' 75.00 80.00 2.22 2.10 3.56 3.58 0.06 0.06 3.50 3.52 85.00 2.00 3.62 0.07 3.56 90.00 1.90 3.65 0.07 3.57 95.00 1.80 3.65 0.07 3.57 100.00 1.70 3.62 0.08 3.55 105.00 1.65 3.69 0.08 3.61 110.00 1.60. 3.75 0.09 3.67 115.00 120.00 1.55 1.50 3.80 3.84 0.09 0.09 3.71 3.74 125.00 1.45 3.86 0.10 3.77 130.00 1.40 3.88 0.10 3.78 135.00 1.35 3.89 0.11 3.78 140.00 1.30 3.88 0.11 3.77 145.00 150.00 1.25 1.20 3.86 3.84 0.11 0.12 3.75 3.72 155.00 1.17 3.86 0.12 3.73 160.00 1.13 3.87 0.13 3.74 ' 165.00 1.10 3.87 0.13 3.74 THE REQUIRED POND SIZE = 3.779477 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 135 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 User = Fred Ernst........................................................... EXECUTED ON 05-05-1997 AT TIME 14:17:06 PROJECT TITLE: Harmony Technological Park ODP - Pond 6 **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = 6.00 BASIN AREA (acre)= 15.35 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 9.0 7.2 5.2 4.2 3.5 3.0 2.6 2.1 1.7 1.5 1.2 1.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = .57 CFS OUTFLOW ADJUSTMENT FACTOR = 1 AVERAGE RELEASE RATE = .57 CFS AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR. 1 ***** GEOMETRIES OF AN EQUIVALENT CIRCULAR POND STAGE CONTOUR CONTOUR POND POND (DEPTH) DIAMETER AREA SIDE SLP STORAGE FEET FEET ACRE FT/FT ACRE -FT 63. 0.00 166.53 0.50 3.00 0.00 0.50 169.53 0.52 3.00 0.25 1.00 172.53 0.54 3.00 0.52 1.50 175.53 .0.56 3.00 0.79 2.00 178.53 0.57 3.00 1.07 2.50 181.53 0.59 3.00 1.37 3.00 184.53 0.61 3.00 1.67 3.50 187.53 0.63 3.00 1.98 4.00 190.53 0.65 .3.00 2.30 4.50 193.53 0.68 3.00 2.63 5.00 196.53 0.70 3.00 2.98 5.50 199.53 0.72 3.00 3.33 6.00 202.53 0.74 3.00 3.70 6.50 205.53 0.76 3.00 4.07 7.00 208.53 0.78 3.00 4.46 7.50 211.53 0.81 3.00 4.85 8.00 214.53 0.83 .3.00 5.26 8.50 217.53 0.85 .3.00 5.68 9.00 220.53 0.88 3.00 6.12 9.50 223.53 0.90 3.00 6.56 10.00 226.53. 0.93 3.00 7.02 11 1 1 1 1 ***** COMPUTATION OF POND SIZE RAINFALL RAINFALL INFLOW OUTFLOW REQUIRED DURATION INTENSITY VOLUME VOLUME STORAGE MINUTE INCHM ACRE -FT ACRE -FT ACRE -FT 0.00 0.00 0.00 0.00 0.00 5.00 9.00 1.60 0.03 1.57 10.00 7.20 2.57 0.06 2.50 15.00 6.20 3.32 0.10 3.22 20.00 5.20 3.71 0.13 3.58 25.00 4.70 4.19 0.16 4.03 30.00 4.20 4.49 0.19 4.30 35.00 3.85 4.80 0.22 4.58 40.00 3.50 4.99 0.26 4.73 45.00 3.25 5.21 0.29 4.93 50.00 3.00 5.35 0.32 5.03 55.00 2.80 5.49 0.35 5.14 60.00 .2.60 5.56 0.39 5.18 65.00 2.47 5.74 0.42 5.32 70.00 2.35 5.86 0.45 5.42 75.00 2.22 5.95 0.48 5.47 80.00 2.10 5.99 0.51 5.48 85.00 2.00 6.06 0.55 5.52 90.00 1.90 6.10 0.58 5.52 95.00 1.80 6.10 0.61 5.49 100.00 1.70 6.06 0.64 5.42 105.00 1.65 6.18 0.67 5.50 110.00 1.60• 6.27 0.71 5.57 115.00 1.55 6.36 0.74 5.62 120.00 1.50 6.42 0.77 5.65 125.00 1.45 6.46 0.80 5.66 130.00 1.40 6.49 0.83 5.65 135.00 1.35 6.50 0.87 5.63 140.00 1.30 6.49 0.90 5.59 145.00 1.25 6.46 0.93 5.53 150.00 1.20 6.42 0.96 5.45 155.00 1.17 6.45 1.00 5.45 THE REQUIRED POND SIZE = 5.659611 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 125 MINUTES F' (-T-. It- Jr- �,•V yl-'j - 1.za E, 6(,C1,7-;;' _ -4.0.3 AL -PT- 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 User = Fred Ernst........................................................... EXECUTED ON 05-02-1997 AT TIME 15:44:14 PROJECT TITLE: Harmony Technological Park ODP - Pond 5 **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = 5.00 BASIN AREA (acre)= 25.67 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS DESIGN RETURN PERIOD (YEARS)=100.00 INTENSITY(IN/HR)-DURATION(Iv M TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.0 7.2 5.2 4.2 3.5 3.0 2.6 2.1 1.7 1.5 1.2 1.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = 4.67 CFS OUTFLOW ADJUSTMENT FACTOR = .998 AVERAGE RELEASE RATE = 4.66066 CFS AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR 1 1 1 1 1 1 1 1 1 1 1 I ***** GEOMETRIES OF AN EQUIVALENT CIRCULAR POND STAGE CONTOUR CONTOUR POND POND (DEPTH) DIAMETER AREA SIDE SLP STORAGE FEET FEET ACRE FT/FT ACRE -FT 0.00 166.53 0.50 3.00 0.00 0.50 169.53 0.52 3.00 0.25 1.00 172.53 0.54 3.00 0.52 1.50 175.53 0.56 3.00 0.79 2.00 178.53 0.57 3.00 1.07 2.50 181.53 0.59 3.00 1.37 3.00 184.53 0.61 3.00 1.67 3.50 187.53 0.63 3.00 1.98 4.00 190.53 0.65 3.00 2.30 4.50 193.53 0.68 3.00 2.63 5.00 196.53 0.70 3.00 2.98 5.50 199.53 0.72 3.00 3.33 6.00 202.53 0.74 3.00 3.70 6.50 205.53 0.76 3.00 4.07 7.00 208.53 0.78 3.00 4.46 7.50 211.53 0.81 3.00 4.85 8.00 214.53 0.83 3.00 5.26 8.50 217.53 0.85 3.00 5.68 9.00 220.53 0.88 3.00 6.12 9.50 223.53 0.90 3.00 6.56 63.00 6.12 9.50 223.53. 0.90 3. 1 1 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 9.00 1.48 0.03 1.45 10.00 7.20 2.37 0.06 2.31 15.00 6.20 3.07 0.09 2.98 ' 20.00 5.20 3.43 0.12 3.31 25.00 4.70 3.87 0.15 3.72 30.00 4.20 4.15 0.18 3.97 35.00 3.85 4.44 0.21 4.23 40.00 150 4.61 0.24 4.38 45.00 3.25 4.82 0.27 4.55 ' 50.00 3.00 4.94 0.30 4.65 55.00 2.80 5.08 0.33 4.75 60.00 2.60 5.14 0.36 4.79 65.00 2.47 5.30 0.39 4.92 :-� 70.00 2.35 5.42 0.42 5.01 ' 75.00 2.22 5.50 0.45 5.05 80.00 2.10 5.54 0.48 5.06 -,: 85.00 2.00 5.60 0.50 5.10 ' 90.00 1.90 5.64 0.53 5.10 95.00 1.80 5.64 0.56 5.07 100.00 1.70 5.60 0.59 5.01 105.00 1.65 5.71 0.62 5.09 110.00 1.60. 5.80 0.65 5.15 115.00 120.00 1.55 1.50 5.87 5.93 0.68 0.71 5.19 5.22 125.00 1.45 5.97 0.74 5.23 130.00 1.40 6.00 0.77 5.23 135.00 1.35 6.01 0.80 5.20 140.00 1.30 6.00 0.83 5.17 145.00 1.25 5.97 0.86 5.11 150.00 1.20 5.93 0.89 5.04 155.00 1.17 5.96 0.92 5.04 -------------------------------------------------- THE REQUIRED POND SIZE = 5.231384 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 125 MINUTES cue/ at= C�r�.r-zTy 1 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 User = Fred Ernst........................................................... EXECUTED ON 05-02-1997 AT TIME 15:43:26 PROJECT TITLE: Harmony Technological Park ODP - Pond 4 **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = 4.00 BASIN AREA (acre)= 23.73 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS DESIGN RETURN PERIOD (YEARS)=100.00 INTENSITY(IN/HR)-DURATIONX[N) TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.0 7.2 5.2 4.2 3.5 3.0 2.6 2.1 1.7 1.5 1.2 1.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = 4.32 CFS OUTFLOW ADJUSTMENT FACTOR = .998 AVERAGE RELEASE RATE = 4.31136 CFS AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR. * * * * * GEOMETRIES OF AN EQUIVALENT CIRCULAR POND STAGE CONTOUR CONTOUR POND POND (DEPTH) DIAMETER AREA SIDE SLP STORAGE FEET FEET ACRE FT/FT ACRE -FT 0.00 166.53 0.50 3.00 0.00 0.50 169.53 0.52 3.00 0.25 1.00 172.53 0.54 3.00 0.52 1.50 175.53 0.56 3.00 0.79 2.00 178.53 0.57 3.00 1.07 2.50 181.53 0.59 3.00 1.37 3.00 184.53 0.61 3.00 1.67 3.50 187.53 0.63 3.00 1.98 4.00 190.53 0.65 3.00 2.30 4.50 193.53 0.68 3.00 2.63 5.00 196.53 0.70 3.00 2.98 5.50 199.53 0.72 3.00 3.33 6.00 202.53 0.74 3.00 3.70 6.50 205.53 0.76 3.00 4.07 7.00 208.53 0.78 3.00 4.46 7.50 211.53 0.81 3.00 4.85 8.00 214.53 0.83 3.00 5.26 8.50 217.53 0.85 3.00 5.68 9.00 220.53 0.88 3.00 6.12 9.50 223.53 0.90 3.00 6.56 ------------- -------------------------------------- 63.00 6.12 9.50 223.53. 0.90 3. "i ***** 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 9.00 1.49 0.03 1.46 10.00 7.20 2.39 0.06 2.33 15.00 6.20 3.08 0.09 2.99 20.00 5.20 3.45 0.12 3.33 25.00 4.70 3.89 0.15 3.75 30.00 4.20 4.17 0.17 4.00 35.00 3.85 4.46 0.20 4.26 40.00 3.50 4.64 0.23 4.41 45.00 3.25 4.84 0.26 4.58 50.00 3.00 4.97 0.29 4.68 55.00 2.80 5.10 0.32 4.78 60.00 2.60 5.17 0.35 4.82 ' 65.00 2.47 5.33 0.38 4.95 - 70.00 2.35 5.45 0.41 5.04 75.00 2.22 5.53 0.44 5.09 80.00 2.10 5.57 0.46 5.10 - 85.00 2.00 5.63 0.49 5.14 90.00 1.90 5.66 0.52 5.14 95.00 1.80 5.66 0.55 5.11 100.00 1.70 5.63 0.58 5.05 105.00 1.65 5.74 0.61 5.13 110.00 1.60. 5.83 0.64 5.19 115.00 1.55. 5.90 0.67 5.24 120.00 1.50 5.96 0.70 5.27 125.00 1.45 6.00 0.73 5.28 ' 130.00 1.40 6.03 0.75 5.27 135.00 1.35 6.04 0.78 5.25 140.00 1.30 6.03 0.81 5.22 145.00 _ 1.25 6.00 0.84 5.16 150.00 1.20 5.96 0.87 5.09 155.00 1.17 5.99 0.90 5.09 ----------------------------------------------------- THE REQUIRED POND SIZE = 5.278775 ACRE -FT ' THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 125 MINUTES 1 1 1 1 1 1 1 1 _r 1 1 1 1 1 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 User = Fred Ernst........................................................... EXECUTED ON 05-02-1997 AT TIME 15:42:42 PROJECT TITLE: Harmony Technological Park ODP - Pond 3 **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = 3.00 BASIN AREA (acre)= 23.85 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS DESIGN RETURN PERIOD (YEARS)=100.00 INTENSITY(1N/HR)-DURATION(MIN) TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.0 7.2 5.2 4.2 3.5 3.0 2.6 2.1 1.7 1.5 1.2 1.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = 4.22 CFS OUTFLOW ADJUSTMENT FACTOR = .998 AVERAGE RELEASE RATE = 4.21156 CFS AVERAGE RELEASE RATE =MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR. 1 1 1 1 1 n, 1 1 1 ***** GEOMETRIES OF AN EQUIVALENT CIRCULAR POND STAGE CONTOUR CONTOUR POND POND (DEPTH) DIAMETER AREA SIDE SLP STORAGE FEET FEET ACRE FT/FT ACRE -FT 0.00 166.53 0.50 3.00 0.00 0.50 169.53 0.52 3.00 0.25 1.00 172.53 0.54 3.00 0.52 1.50 175.53 0.56 3.00 0.79 2.00 178.53 0.57 3.00 1.07 2.50 181.53 0.59 3.00 1.37 3.00 184.53 0.61 3.00 1.67 3.50 187.53 0.63 3.00 1.98 4.00 190.53 0.65 3.00 2.30 4.50 193.53 0.68 3.00 2.63 5.00 196.53 0.70 3.00 2.98 5.50 199.53 0.72 3.00 3.33 6.00 202.53 0.74 3.00 3.70 6.50 205.53 0.76 3.00 4.07 7.00 208.53 0.78 3.00 4.46 7.50 211.53 0.81 3.00 4.85 8.00 214.53 0.83 3.00 5.26 8.50 217.53 0.85 3.00 5.68 9.00 220.53 0.88 3.00 6.12 3.00 5.68 9.00 220.53. 0.88 3.00 6.12 r COMPUTATION OF POND SIZE RAINFALL RAINFALL INFLOW OUTFLOW REQUIRED DURATION INTENSITY VOLUME VOLUME STORAGE --MINUTE II�TCH/HR ACRE -FT ACRE -FT ACRE -FT ---------------------------------------------- 0.00 0.00 0.00 0.00 0.00 ' 5.00 9.00 1.37 0.03 1.34 10.00 7.20 2.20 0.06 2.14 15.00 6.20 2.84 0.09 2.75 20.00 5.20 3.17 0.11 3.06 25.00 4.70 3.59 0.14 3.44 30.00 35.00 4.20 3.85 3.84 4.11 0.17 0.20 3.67 3.91 40.00 3.50 4.27 0.23 4.04 45.00 3.25 4.46 0.26 4.20 50.00 3.00 4.58 0.29 4.29 55.00 2.80 4.70 0.32 4.38 60.00 2.60 4.76 0.34 4.42 65.00 2.47 4.91 0.37 4.54 -� 70.00 2.35 5.02 0.40 4.62 ' 75.00 2.22 5.09 0.43 4.66 80.00 2.10 5.13 0.46 4.67 =>3 85.00 2.00 5.19 0.49 4.70 90.00 1.90 5.22 0.52 4.70 95.00 1.80 5.22 0.55 4.67 100.00 1.70 5.19 0.57 4.61 105.00 1.65 5.29 0.60 4.68 110.00 1.60. 5.37 0.63 4.74 115.00 1.55 5.44 0.66 4.78 120.00 1.50 5.49 0.69 4.80 125.00 1.45 5.53 0.72 4.81 130.00 1.40 5.55 0.75 4.81 135.00 1.35 5.56 0.78 4.79 140.00 1.30 5.55 0.80 4.75 145.00 1.25 5.53 0.83 4.70 150.00 1.20 5.49 0.86 4.63 155.00 1.17 5.52 0.89 4.63 ----------------------------------------------------- THE REQUIRED POND SIZE = 4.812385 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 125 MINUTES DETENTION POND SIZrNTG 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 User = Fred Ernst........................................................... EXECUTED ON 05-02-1997 AT TIME 15:41:59 PROJECT TITLE: Harmony Technological Park ODP - Pond 2 **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = 2.00 BASIN AREA (acre)= 21.97 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS DESIGN RETURN PERIOD (YEARS)=100.00 INTENSITY(IN/HR)-DURATION(NW TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.07.25.24.23.53.02.62.1 1.71.5 1.21.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = 4.18 CFS OUTFLOW ADJUSTMENT FACTOR = .998 AVERAGE RELEASE RATE = 4.17164 CFS . AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR * * * * * GEOMETRIES OF AN EQUIVALENT CIRCULAR POND STAGE CONTOUR CONTOUR POND POND (DEPTH) DIAMETER AREA SIDE SLP STORAGE FEET FEET ACRE FT/FT ACRE -FT . 0.00 166.53 0.50 3.00 0.00 0.50 169.53 0.52 3.00 0.25 1.00 172.53 0.54 3.00 0.52 1.50 175.53 0.56 3.00 0.79 2.00 178.53 0.57 3.00 1.07 2.50 181.53 0.59 3.00 1.37 3.00 184.53 0.61 3.00 1.67 3.50 187.53 0.63 3.00 1.98 4.00 190.53 0.65 3.00 2.30 4.50 193.53 0.68 3.00 2.63 5.00 .196.53 0.70 3.00 2.98 5.50 199.53 0.72 3.00 3.33 6.00 202.53 0.74 3.00 3.70 6.50 205.53 0.76 3.00 4.07 7.00 208.53 0.78 3.00 4.46 7.50 211.53 0.81 3.00 4.85 8.00 214.53 0.83 3.00 5.26 8.50 217.53 0.85 3.00 5.68 9.00 220.53 0.88 3.00 6.12 9.50 223.53 0.90 3.00 6.56 10.00 226.53 0.93 3.00 7.02 10.50 229.53 0.95 3.00 7.49 11.00 232.53 0.97 3.00 7.97 11.50 235.53 1.00 3.00 8.46 12.00 238.53 1.03 3.00 8.97 12.50 241.53 1.05 3.00 9.49 13.00 244.53 1.08 3.00 10.02 13.50 247.53 1.10 3.00 10.57 14.00 250.53 1.13 3.00 11.13 14.50 253.53 1.16 3.00 11.70 15.00 256.53 1.19 3.00 12.28 ---------------------------------------------------- 63.00 11.70 15.00 256.53 1.19 3.00 12.28 ' * * * * * COMPUTATION OF POND SIZE ----------------------------------------------- RAINFALL RAINFALL INFLOW OUTFLOW REQUIRED i 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 9.00 2.81 0.06 2.76 10.00 7.20 4.50 0.12 4.39 15.00 6.20 5.82 0.18 5.64 20.00 5.20 6.50 0.23 6.27 25.00 4.70 7.35 0.29 7.06 1 30.00 4.20 7.88 0.35 7.53 -.-, 35.00 3.85 8.43 0.41 8.02 40.00 3.50 8.76 0.47 8.29 45.00 3.25 9.15 0.53 8.62 50.00 3.00 9.38 0.59 8.80 55.00 60.00 2.80 2.60 9.63 9.76 0.64 0.70 8.99 9.05 65.00 2.47 10.06 0.76 9.30 70.00 2.35 10.29 0.82 9.47 75.00 2.22 10.44 0.88 9.56 _ 80.00 2.10 10.51 0.94 9.57 85.00 2.00 10.63 0.99 9.64 90.00 1.90 10.69 1.05 9.64 95.00 1.80 10.69 1.11 9.58 100.00 1.70 10.63 1.17 9.46 105.00 1.65 10.84 1.23 9.61 110.00 1.60, 11.01 1.29 9.72 115.00 1.55 11.15 1.35 9.80 120.00 1.50 11.26 1.40 9.85 125.00 130.00 1.45 1.40 11.34 11.38 1.46 1.52 9.87 9.86 y� 135.00 1.35 11.40 1.58 9.82 140.00 1.30 11.38 1.64 9.74 ' 145.00 1.25 11.34 1.70 9.64 150.00 1.20 11.26 1.76 9.50 155.00 1.17 11.31 1.81 9.50 THE REQUIRED POND SIZE = 9.873136 ACRE -FT THE RAINFALL DURATION FOR THE ABOVE POND STORAGE= 125 MINUTES ' DETENTION POND SIZINIG 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 User = Fred Ernst.......................................................:... EXECUTED ON 05-02-1997 AT TIME 16:34:16 PROJECT TITLE: Harmony Technological Park ODP - Pond 1 **** DRAINAGE BASIN DESCRIPTION BASIN ID NUMBER = 1.00 BASIN AREA (acre)= 45.03 RUNOFF COEF = 1.00 ***** DESIGN RAINFALL STATISTICS .� DESIGN RETURN PERIOD (YEARS)=100.00 INTENSITY(1N/HR)-DURATION(MIN) TABLE IS GIVEN DURATION 5 10 20 30 40 50 60 80 100 120 150 180 INTENSITY 9.07.25.24.23.53.02.62.1 1.71.51.21.0 ***** POND OUTFLOW CHARACTERISTICS: MAXIMUM ALLOWABLE RELEASE RATE = 8.520001 CFS OUTFLOW ADJUSTMENT FACTOR = .997 AVERAGE RELEASE RATE = 8.49444 CFS ' AVERAGE RELEASE RATE = MAXIMUM RELEASE RATE * ADJUSTMENT FACTOR. 1 1 A 1 1 1 1 1 1 THE SEAR -BROWN GROUP wAir. Project: MP Project No. 732-oas gy: Checked: Date: IXJ Sheet I of C t t2 (o.qS> + 16�j•15> 39+;Z+I(. _ UD Pond Outflow rate adjustment factor for FAA Method Y 1 rr �;�,^�[�� 1'Lfl+ii.�� y i�U...', ® f • � Y rt f y��I �G. Y J � t. ._ G„ • / - I'• '� 4'� li. I +i f d • . 1• 11• 1 ••: 2:20 PM The Sear -Brown Group 5/5/97 Detention Pond Summary Harmony Technological Park ODP Project No. 737-005 • 2.00 12.34 / 2.00 • .01 / 2.00 • •, 4 3.27 „ • .54 ♦ 2.00 • 4.73 2:28 PM The Sear -Brown Group 5/5/97 I - I Detention Pond Design I I I I I Rational Method 100 yew design storm for detention pond storage volumes. Harmony Technological Park OOP Project No. 737-005 Routing Flow Time (tj Design Point London 1 2 3 1 5 6 Basins 1 2 3 4 5 S. Roads t. (min) 16.9 17.9 20.1 19.0 19.0 0.0 Channel .Street Pipe it (min) 18.9 17.7 20.1 19.0 19.0 75.0 C 0.80 0.80 0.B0 0.50 0.80 0.50 Intensity Area CrOV(at) 5.34 45.03 5.53 21.97 5.17 23.85 5.33 23.73 5.33 25.67 2.21 15.35 Direct Runoff (cis) 19234 9722 98.57 101.25 109.51 27.18 Other Runoff (cis) O.OD 0.00. 0.00 0.00 0.00 0.00 Total Runoff (cis) 192.34 97.22 98.57 101.25 109.51 27.18 Remarks Channel Charnel Slops Velocity Charnel Length 00 T (a) r (ti) live) (min) None - - 0.0 0.0 None - �' - 0.0 0.0 None - - 0.0 0.0 None - - 0.0 0.0 None - - 0.0 0.0 2970.0 Pl. 1.0 0.7 75.0 Street Capacity Velocity Street Length (it) (cis) (Ns) (min) None - - 0.0 None - - 0.0 None - - 0.0 None - - 0.0 Nora - - 0.0 None - - 0.0 Pipe Slope Material Size Capacity Velocity Pipe Length (it) M (cm or m1 (in) (dal (lea) (min) None - - - - - 0.0 None - - - - - 0.0 None - - - - - 0.0 None - - - - - 0.0 None - - - - - 0.0 None - - - - - 0.0 NMe' a) Codes the danrah type for velocity calculations: PA a Paved Area, Pl. a Pa"e6 Lawns, GW a Grassed Waterway. Remarks: - The'00har Runoff val as for design points 2 through 6 we from flow that has passed the upstream area Inlet The Slv4k M CMW I 1:51 PM Ws? Js7 1 n` Rational Method 2 year design storm for detention pond allowable release rate. Harmony Technological Park OOP . Project No. 737-005 Routing Flow Tune (tJ Direct Other Total ' Remarks Channel Channel Street Street Capacity Velocity Street Pipe Pipe Slope Material Size Capacity V(fits) Pipe k C Intensity Area Runoff Runoff Runoff ' Design Point Basins 4 Channel Channel Slope Velocity Length (h) N (cm or eo) (in) (cis) (Ws) (min) (min) (INhr) (ac) (cis) (cis) (cis) London (min) Length (ft) Type (a) None - M - ON 0.0 (min) 0.0 Length (ft) None (cis) (We) (min) - - 0.0 None - - - - - 0.0 - - 0.0 78.3 77.8 0.25 0.25 0.76 . 0.78 46.03 21.87 8.52 4.18 0.00 0.00 8.52 , 4.18 1 1 78.3 2 2 77.6 None - - 0.0 0.0 None - - 0.0 None - - - - 0.0 85.8 0.25 0.71 23.85 4.22 . 0.00 4.22 3 3 85.8 None - - 0.0 0.0 None - - 0.0 None - - - - - 0.0 62.5 0,25 0.73 23.73 4.32 0.00 4.32 4 4 82.5 None - - 0.0 0.0 None - - 0.0 None - - - - - 0.0 82.5 0.25 0.73 25.67 4.67 0.00 4.67 5 5 82.5 None - - 0.0 - 0.0 None - - 0.0 None - - - - - 0.0 43.6 0,25 1.14 2.00 0.57 0.00 0.57 6 6 43.6 None - - 0.0 -0.0 None - - 0.0 None - - - - a) Codes the channel type for velocity calculations: PA = Paved Area, PL = Pasture& Lawns. GW = Grassed Watrerway. The Sear -Brown Group Time of Concentration for Developed Condition 100 year design storm Harmony Technological Park ODP Project No. 737-005 1.87(1.1 CCf)-JD- ti = sO.333 tc = tr + tL Cr = 1.25 SUB -BASIN DATA IN171ALIOVERIAND TIME TRAVEL TIME FINAL REMARKS BASIN AREA C LENGTH SLOPE 4 LENGTH CHANNEL SLOPE VELOCITY tL t. NO. (ac) (tt) (°fo) (min) (ft) TYPE(a) (°fo) MIS) (min) (min) 1 2 3 4 5 6 7 8 10 12 13 1 45.03 0.80 0 - 0.0 2050 PA 0.9 1.81 18.9 18.9 2 21.97 0.80 0 - 0.0 1560 PA 0.6 1.47 17.7 17.7 3 23.85 0.80 0 - 0.0 1610 PA 0.5 1.34 20.1 20.1 4 23.73 0.80 0 - 0.0 1520 PA 0.5 1.34 19.0 19.0 5 25.67 0.80 0 - 0.0 1520 PA 0.5 1.34 19.0 19.0 6 2.00 0.80 475 0.5 5.1 0 - - 0.00 0.0 5.1 Note: a) Column 8 codes the channel type for velocity calculations: PA = Paved Area, PL = Pasture& Lawns, GW = Grassed Watrerway. 8:12 AM The Sear -Brown Group 5/5/97 Historical Time of Concentration 2 year design storm Harmony Technological Park ODP Project No. 737-005 1.87(1.1- CC f ),%D 5.0.333 tc = f/+fL Cr = 1.00 SUB -BASIN DATA INITIAL/OVERLAND TIME TRAVEL TIME FINAL REMARKS BASIN AREA C LENGTH SLOPE ti LENGTH CHANNEL SLOPE VELOCITY tL I. NO. (ac) (ft) N (min) (ft) TYPE(a) N MIS) (min) (min) 1 2 3 4 5 6 7 8 10 12 13 1 45.03 0.25 500 0.9 36.8 1550 PL 0.9 0.62 41.5 78.3 2 21.97 0.25 500 0.6 42.1 1060 PL 0.6 0.50 35.4 77.6 3 23.85 0.25 500 0.5 44.8 1110 PL 0.5 0.45 41.0 85.8 4 23.73 0.25 500 0.5 44.8 1020 PL 0.5 0.45 37.7 82.5 5 25.67 0.25 500 0.5 44.8 1020 PL 0.5 0.45 37.7 82.5 6 2.00 0.25 475 0.5 43.6 0 - - 0.00 0.0 43.6 Note: a) Column 8 codes the channel type for velocity calculations: PA = Paved Area, PL = Pasture& Lawns. GW = Grassed Watrerway. 8:12 AM The Sear -Brown Group 5/5/97 Table of Areas and Composite Runoff Coefficients Harmony Technological Park ODP Project No. 737-005 1 acre = 43,560 ft2 1 1,970,516 45.03 2 966,230 21.97 3 1,047,775 23.85 4 1,042,754 23.73 5 952,835 25.67 Roads 581,560 13.35 6 258,481 2.00 SITF 1 RR Fir Composite "C" for Routing Basins Basins Total Area "C*A" "C" 6,Roads 15.35 12.32 0.80 The Sear -Brown Group 2:31 PM 5/5/97 Site Hydrology. I I I i MDH L�RL LDN tDN LDN srOOrw R7AD m I RL LDN LK ;1 kAR 01ONY ROAD Hop FL LAN RL 0 PON URBAN GROW 14 AREA �1� Om RL VICINITY MAP SCALE: 1 " = 2000' NO - A n i r i I Vicinity Map i I i I I I 1 i i I I I I I I I I I APPENDIX I 1*1 1 1 1 1 1 1 1 1 .1 were employed to ensure that the historical flow condition from the site was not adversely affected. C. Erosion Control Concept Preceeding parcel development, erosion control plans will be produced in accordance to the recommendations provided for in the The City of fort Collins Storm Drainage Design Criteria Manual. REFERENCES 1. Storm Drainage Design Criteria and Construction Standards by the City of Fort Collins, Colorado, May 1984, Revised March, 1991. 4 ' - coefficients of 0.25 and 0.8 were used for the historical and proposed conditions, respectively. Due to the preliminary nature of the project, the required volume derived from the FAA Method was then multiplied by a factor of safety of 1.25 to arrive at the final design volume. Flows from each detention ' pond will be released at the 2 year historical rate into an adjacent roadside swale. Stormwater runoff from the surface area within the right-of-way for all collector streets running through the site will be detained at a Regional detention pond located in the southeast corner of the site (Pond 6). Stormwater will be released from Pond 6 at the 2 year historical rate for its tributary area (the collector roads). Runoff from the five parcels will be conveyed by the roadside swales to Pond 6, and passed through an overflow control structure and into an offsite channel that will convey the flow to the Fossil Creek Reservoir Inlet Ditch. An easement will have to be acquired to accomodate the offsite drainage and emergency overflow channel route from the site to the Fossil Creek Reservoir Inlet Ditch. V. EROSION CONTROL A. General Concept Erosion control plans and related calculations will be applied on an individual basis to each parcel as they are developed. ' A. Compliance with Standards All computations that have been completed within this report ' are in compliance with The City of Fort Collins Storm Drainage Design Criteria Manual, B. Drainage Concept ' The proposed drainage concepts adequately provide for the safe transmission of stormwater flows off the proposed Harmony Technological. Park site. Drainage detention and routing methods ' 3 III. DRAINAGE DESIGN CRITERIA ' A. Regulations The City of Fort Collins Storm Drainage Design Criteria was used for the preparation of this report. B. Development Criteria Reference and Constraints Flows will be released from the site in quantities equal to the historical condition. C. Hydrological Criteria The rational method for determining surface runoff was used for the project site. The 2 and 100 year storm event criteria, obtained from the City of Fort Collins, were used in calculating runoff values. These calculations and criteria are included in the Appendix. D. Hydraulic Criteria All hydraulic calculations within this report have been prepared in accordance with the City of Fort Collins Drainage Criteria and are included in the Appendix. E. Variances from Criteria No variances from City of Fort Collins Storm Drainage Criteria are being sought for this project. ' IV. DRAINAGE FACILITY DESIGN A. General Concept The overall site has conceptually been subdivided into five parcels that will undergo development at different times. The '. stormwater runoff from each parcel will be detained in detention ponds located on each parcel's property (Ponds 1 through 5, ' See Sheet 1). The detention ponds were sized using the FAA 1 2 Harmony Technological Park Overall Drainage Plan A. Location The proposed site is located in the NW 1/4 of Section 4 T.6N, R. 69W of the 6th Prime Meridian, Larimer County. The overall site is bounded on the North by Harmony Road (State Highway 68), on the West by County Road.9, and on the South and East by open fields. The site consists of approximately 156 acres and resides within the city limits of Fort Collins. A location map is included in the Appendix of this report. B. Description of Property This property consists of plowed fields with an occupied farm house in the northwest corner of the site. The general topography of the site slopes from the Northwest to the Southeast at a grade ranging from 0.3%-1.5%. An irrigation ditch runs along the west side of the site between County Road 9 and the site. The proposed development plan will consist of office and manufacturing industry. A. Major Basin Description The site is located within the East Harmony Portion of ' McClellands Basin. This portion of the McClellands Basin has not been closely studied. However, the City has currently ' contracted for a Master Drainage Study of the area. The site historically discharges into the Fossil Creek Reservoir Inlet Ditch. No major drainageways exist within the site. 1 1 1 1 1 1 1 1 1 1 1 1 I. GENERAL LOCATION AND DESCRIPTION A. Location B. Description of Property II. DRAINAGE BASINS A. Major Basin Description III. DRAINAGE DESIGN CRITERIA A. Regulations B. Development Criteria Reference and Constraints C. Hydrological Criteria D. Hydraulic Criteria E. Variances from Criteria IV. DRAINAGE FACILITY DESIGN A. General Concept V. EROSION CONTROL A. General Concept VI. CONCLUSIONS A. Compliance with Standards B. Drainage Concept C. Erosion Control Concept REFERENCES APPENDIX Vicinity Map Site Hydrology Detention Pond Design Charts and Tables 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 5 6 7 8 9 1 1 1 1 1 May 5, 1997 Basil Hamdan City of Fort Collins Utility Services, Stormwater 235 Matthews Fort Collins, Colorado 80522 RE: Overall Drainage Plan for the Harmony Technological Park ODP, Sear -Brown Project No. 737-005 Dear Basil: We are submitting to you, for your review and approval, this Overall Drainage Plan for the Harmony Technological Park ODP. All- computations within this report have been completed in compliance with the City of Fort Collins Storm Drainage Design Criteria. We appreciate your time and consideration in reviewing this submittal. Please call if you have any questions. Respectfully, The Sear -Brown Group, Inc. Prepared by: Frederick C. Ernst, E.I.T. Design Engineer Reviewed by: Kevin W. Gingery, P.E. Water Resources Manager I f 1 1 1 1 1 1 1 1 Harmony Technological Park Overall Drainage Plan Fort Collins, Colorado May 5, 1997 Prepared for: Client: Black Fox Real Estate Group Fort Collins, Colorado Prepared by: The Sear -Brown Group 209 S. Meldrum Fort Collins, Colorado 80521 (303) 482-5922 SBG Job No. 737-005 1 Harmony Technological Park Overall Drainage Plan Fort Collins, CO May 5, 1997 I 1 THE SEAR -BROWN GROUP Standards in Excellence