Laserfiche WebLink
APPENDIX A <br />Stream Bank Erosion Contral Calculations <br />� Project precipitation values: <br />6 month 0•99 in• <br />p y� 1.55 <br />I � p yr 225 <br />25 yr 2.60 <br />100 yr 3.25 <br />Existing Event Summary: <br />BasinlD Peak � Peak T Peak, Vol Area Method <br />------- (cts) (hrs) (ac-it) ac /Loss <br />Exisling 0.08 8.50 0.0464 0.97 SCS/SCS <br />ExisUng 0.18 8.33 O.OBBt D.97 SCS/SCS <br />Exisling 0.34 8.33 0.1552 0.97 SCS/SCS <br />Drainage Area: Existing <br />Hyd Method: SCS Unit Hyd <br />Peak Factor: 484.00 <br />Starm Dur 24.00 hrs <br />Area CN <br />Pervious 0 8600 ac 85.00 <br />Impervious 0.1140 ac 98.00 <br />Total C0.9700.ac- <br />Supporting Data: <br />Pervious CN Data: <br />Open S�•ace (Grass cover > 75%) <br />Impervious CN Data: <br />Paved 98.00 <br />Pervious TC Data: <br />Flow type: Description: <br />Sheet Overland Fiow <br />Shallow Overland Fluw <br />Impervious TC Data: <br />Flow type: Description: <br />Sheet Paved <br />Sheet Overiand Flow <br />Raintype Event <br />rvPeiA 2yr <br />lYPE1A 10yr <br />TYPEtA 100y� <br />Loss Method: SCS CN Number <br />SCS Abs: 020 5G . p µ� <br />r- <br />TC �5 r✓) � <br />0.67hrs �8I ��I� �r�/�� ' / �,� <br />0.7'L hfS v <br />a c o�c-ti-�,��i <br />85.00 0.8600 ac <br />0.1100 ac <br />Length: Slope: <br />300.00 it 1.73% <br />20.00 ft 0.50% <br />Length: Slope: <br />20.00 ft 0.50% <br />280.00 ft 1.30% <br />CoetL• Travel Time <br />0.1700 39.71 min <br />11.0000 0.29 min <br />Coeff: Travel Time <br />0.0100 0.78 min <br />0.1700 42.13 min <br />Proposed Event Sumniary: <br />BasinlD Peak Q Peak T Peak Voi Area Method <br />_....._ (cts) (hrs) (ao-tt) ac /Loss <br />P.oposed 027 8.00 0.0927 0.97 SCS/SCS <br />P�oposed 0.42 8.00 0.7454 0.97 SCS/SCS <br />Proposed 0.65 8.00 0.2225 0.97 SCS/SCS <br />Crainage Area: Proposed <br />Hyd Method: SCS Unit Hyd <br />Peak Factor: 484.00 <br />Storm Dur 24.00 hrs <br />Area CN <br />Pervious 02100 ac 86.00 <br />Impervious 0.7600 ac 98.00 <br />Total .0:9700 dc <br />Supportin!7 Data: <br />.....,... -,� <br />Raintype Eve�t <br />TYPEtA 2 yr <br />TYPEIA 1Dyr <br />TYPEIA 100yr <br />Loss Method: SCS CN Number <br />SCS Abs: 020 <br />TC <br />0.27 hrs <br />0.11 hrs <br />Q10?UGIICicipHnFinccrVtcportslAppcndix A malificJ.dce 5/29l2003 <br />Pagc I o(3 <br />� <br />