2506 MELVIN AVE 2018-01-02 MF Import

• Willows Apattmrnu Drainage Study � 09/282009 9/16/09 4:7:54 pm J.C. MCDonnell 6 Associates page 1 The Willows Apartments � Everett Detention September 16, 2009 _��`�'��.��,��_«��asa��as�� a��„'��«"""'��s BASIN SIJt�P1AAY � BASZN ID: H0.50 NAME: 6-Month Undeveloped SBUH METHODOLOGY � TOTAL AREA. . . . . . . : 0.31 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMp PRECIPITATION. . . . : 1.10 inches AREA. . : 0.27 Acres 0.04 Acres TIME .:NTERVAL. . . . : 10.U0 min Cta. . . . : 85.00 98.00 T�, , ,, : il.11 min 10.00 min ( ABSTRACTION COEFF: -^.2� TcReach - Sheet L: 123.00 ns:0.1500 p2y=: 1.50 s:0.0570 � PEAH :tATE: 0.01 cfs VOL: 0.01 Ac-ft TIME: 480 min BASIN ID: B002 NAME: 2-:<'a: Undeveloped SBUH METHODOLOGY ' TOTAL AREA. . . . . . . : 0.31 Actes BASEFLOW.S: 0.00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP pRECIPITATION. . . . : 1.50 inches AAEA. .: 0.27 Acres 0.04 Acres TIME INTERVAL. . . . : 10.00 min �: ; ::; ei.�l�l min 10800Omin ' t�DSTRACTION COEEF: 0.20 TCReach - Sheet L: 123.00 ns:0.1500 p2yr: 1.50 s:0.0570 pEAK AATE: 0.03 cfa VOI�: 0.01 Ac-ft TIME: 9B0 min I BASIN ID: BOLO NAME: 10-Year Undeveloped SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0.31 Acres BASEFLOWS� pERV00 cfs IMp � AAINFALL TYPE. . . . : TYPElA PAECIPITATION. . . . : 2.20 inches AF•EA. . : 0.27 Acres 0.04 Acres TIME INTERVAL. . . . : 10.00 min �C: ; :; ; 11.1�1 min 10800omin � ABSTRACTION COEFF: 0•20 � - 1.50 s:0.0570 TcReach - Sheet L: 123.00 ns:0.7.500 p2y.: pEAK RATE: 0.07 cfs VOL: 0.03 Ac-ft TIME: 480 min � BASIN ID: B100 NAME: 100-Year Gndeveloped SPUH METHODOLOGY TOTAL NtEA. . . . . . . : 0.31 Acres BASEFLOWS: 0.00 cfa RAINFALL TYPE. . . . : TYPElA pERV TMe PRECIPITATION. . . . : 3.20 inches ARE:�. . : 0.2% Acres 0.04 Acres ' TIME INTERVAL. . . . : 10.00 min CN. . . .: 85.00 98.00 T,;, . . . : 11.11 min 10.00 min ABSTRACTION WEFF: 0.20 I TCRe�ch -. Sheet L: 123.00 ns:0.1500 p2yr: 1.50 e:0.0570 pEAK RATE: 0.12 cfs VOL: 0.09 Ac-ft TIME: 4B0 min I � I �� PROJECT�OSS12 I