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� Willows Apartmrnts <br /> Drainage Study <br /> � o9nsrzoo9 <br /> 9/16/09 4:7:54 pm J.C. McDonnell 6 Associates pagr 2 <br /> The Willows Apartments <br /> � Everett Detention <br /> September 16. 2009 �i=__��_,_� <br /> �«���e��,�a����������.,«a����a�ass������t�e�����«�a���«� <br /> , BASIN S[JDII�ARY <br /> � BASIN ID: D0.5 NAME: 6-Month Developed <br /> � SBUH METHODOLOGY <br /> TOTAL AREA. . . . . . . : 0.31 Acres BASEELOWS: 0.00 cfs <br /> RAINFALL TYPE. . . . : TYPElA PERV IMP <br /> FRECZPITATION. . . . : 1.10 inches AREA. . : 0.06 Acres 0.26 Acres <br /> TIME INTERVAL. . . . : 10.00 min CN. . . . : 85.00 96.43 <br /> TC. . . . : 10.00 min 7.00 min <br /> I ABSTRACTION COEFF: 0.20 <br /> TCReach - Sheet L: 123.00 ns:0.1500 p2yr: 1.50 s:0.0570 <br /> PEAK RATE: 0.05 �:fs VOL: 0.02 Ac-ft TIN.E: 480 min <br /> �. BASZN ID: D002 NAME: 2-Year Developed <br /> SBUN METHODOLOGY <br /> � TOTAL AFiEA. . . . . . . : 0.31 Acres BASEFLOIiS: 0.00 cfs <br /> RAINFALL TYPE. . . . : TYPElA PEAV IM2 <br /> PAECZPITATION. . . . : 1.50 inches AREA. . : 0.07 Aczes 0.24 Acres <br /> TIME INTERVAL. . . . : 10.00 min CN. . . . : 85.00 96.16 <br /> TC. . . . : 10.00 min 7.00 min <br /> I ABSTRACTION COEFF: 0.20 <br /> TcReac` - Sheet L: 123.00 ns:0.1500 p2yr: 1.50 s:0.0570 <br /> PEAK RATE: 0.07 cfs VOL: 0.03 Ac-ft TIME: 4B0 min <br /> I BASIN ID: DO10 NAME: 10-Year Developed � <br /> SBUH METHODOLOGY <br /> TOTAL AREA. . . . . . . : 0.31 Acres BASEFLOWS: 0.00 cfs <br /> RAINFALL TYPE. . . . : TYPElA PERV IP1F <br /> I PRECIPITATION. . . . : 2.20 inches AREA. . : 0.06 Ac=es 0.26 Ac=es <br /> TIME INTERVAL. . . . : 10.00 min CN. . . . : 85.00 96.43 <br /> TC. . . . : 10.00 min 7.00 min <br /> � ABSTRACTION COEFF: 0.20 � <br /> TcReach - Shee[ L: 123.00 ns:0.1500 p2yr: 1.50 s:0.0570 <br /> PEAK RATE: 0.12 cfs VOL: 0.04 Ac-ft TIME: 980 min <br /> I BASSN ID: D100 NAME:�-Year Developed <br /> SBUH METHODOLOGY <br /> TOTAL AREA. . . . . . . : 0.31 Acres BASEFLOWS: 0.00 cfs <br /> RAiNFALL TYPE. . . . : TYPElA PERV IMP <br /> PRECIPITATION. . . . : 3.20 inches AAEA. . : 0.06 Aczes 0.26 Acres <br /> I TIME INTERVAL. . . . : 10.00 min CN. . . . : 85.00 96.43 <br /> TC. . . . : 10.00 min 7.00 min <br /> ABSTRACTION COEFF: 0.20 <br /> I TcReach -. Sheet L: 123.00 ns:0.1500 p2Yr: 1.50 s:0.0570 <br /> PEAK AATE: 0.18 cfs VOL: 0.07 Ac-ft TIME: 980 nin <br /> I '. <br /> I <br /> I <br /> 18 PROJECT:05812 <br /> �1 <br />