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Home My WebLink AboutCENTRE FOR ADVANCED TECHNOLOGY 2ND FILING - Filed M-MISCELLANEOUS -, ~ DATE: 1-14-87 PROJECT: C A T -BUSINESS PARK JOB NUMBER: ? DESIGN ENGINEER: BC BASIN DESIGNATION = TOTAL SITE DETERMINE EXISTING Q FOR 2 YEAR STORM HISTORIC RUNOFF COEFFICIENT .2 BASIN SLOPE: 1.5 PERCENT BASIN LENGTH 500 FEET AREA: 4.01 ACRES HIST TC = 1.87*(1.1-( 1 * .2 )>*SQRROOT 500 >)/ 1.5 ^ 1/ = 32.87992 MINUTES HISTORIC RAINFALL INTENSITY: 1.421601 INCHES/HOUR HISTORIC OUTFALL: 1.1401?4' CUBIC FEET PER SECOND DETERMINATION OF DETENTION POND VOLUME FOR DEVELOPED CONDITIONS DEVELOPED STORM: 100 DEVELOPED RUNOFF COEFFICIENT CCFAC = .67 = 3.358375 DURATION MIN 5 10 15 30 45 60 90 120 180 360 M GROSS VOL. CU. FT. 9188.514 14145.48 18014.32 24905.71 29923.12 31555.29 34094.22 34819.63 37721.27 42073.73 YEAR STORM '67 1.25 * OUTFLOW VOL. CU. FT. 342.0372 684.0745 1026.112 2052.223 3078.335 4104,447 6156.67 8208.894 12313.34 24626.68 DETENTION VOL. CU. FT 8846.478 13461.4 16988.21 22853.49 26844,79 27450.85 27937.55 26610.74 25407.93 17447.04 REQUIRED DETENTION VOLUME IS 27937.55 CU. FT. OR .641358 ACRE FEET �� 4'(