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9509 19TH AVE SE 2018-01-02 MF Import
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9509 19TH AVE SE 2018-01-02 MF Import
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Last modified
12/14/2021 10:00:49 AM
Creation date
4/2/2017 2:51:22 PM
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Address Document
Street Name
19TH AVE SE
Street Number
9509
Imported From Microfiche
Yes
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Everett LDS Parking Lot Expansion <br />Storm Drainage Report <br />Area Calculations <br />Description <br />Existing Area <br />Total <br />(sf) <br />(ac) <br />(ac) <br />Total <br />61390 <br />1.41 <br />-- <br />Onsite <br />Impervious <br />0 <br />0.00 <br />_ <br />0.65 <br />Lawn <br />28220 <br />0.65 <br />Of(site Upstream <br />Basin B <br />Im ervious <br />16585 <br />0.38 <br />0.76 <br />Lawn <br />16585 <br />0.38 <br />r- <br />Existing Basin <br />Area (ac) <br />Total Impervious <br />Lawn <br />1.41 0.38 <br />1.03 <br />Description <br />Develo ed Area <br />Total <br />--- <br />-- <br />sf <br />ac <br />ac <br />Total <br />61390 <br />1.41 <br />F- <br />Onsile <br />Im ervious <br />20016 <br />0.46 <br />0.65 <br />Lawn <br />8204 <br />0.19 <br />Otfsile Upstream <br />Basin B <br />Impervious <br />16585 <br />1 0.38 <br />0.76 <br />Lawn <br />16585 <br />1 0.38 <br />Existing Basin <br />Ai ea (ac) <br />I Total I Im ery <br />Lawn <br />1.41ious <br />0.84 <br />0.57 <br />Detention Calculations (StornlShed Output SBUH <br />EXISTING Event Summary: (PRE -DEVELOPED) <br />BasinlD <br />Peak Q <br />Peak T <br />Peak Vol <br />Area <br />Method <br />(cfs) <br />(hrs) <br />(ac-ft) <br />ac <br />/Loss <br />EXISTING <br />0.18 <br />8.00 <br />0.0872 <br />1.41 <br />SBUH/SCS <br />EXISTING <br />0.32 <br />8.00 <br />0.1535 <br />1.41 <br />SBUH/SCS <br />EXISTING <br />0.56 <br />8.00 <br />0.2568 <br />1.41 <br />SBUH/SCS <br />Drainage Area: EXISTING <br />Hyd Method: <br />SBUH Hyd <br />Peak Factor: <br />484.00 <br />Storm Dur: <br />24.00 hrs <br />Area CIA <br />Pervious <br />1.0300 ac 86.00 <br />Impervious <br />0.3800 ac 98.00 <br />Raintype <br />Event <br />TYPEIA <br />2 yr <br />TYPEIA <br />10 yr <br />TYPEIA <br />100yr <br />Loss Method: SCS CIA Number <br />SCS Abs: 0.20 <br />Inty: 10.00 min <br />TC <br />0.60 hrs <br />0.08 hrs <br />F:@0O6W6113 Everett LOS paling LOIlewSm en Reponsr06113 Drainage Repon Revised 01.10.08. doe <br />Page 18 of 36 <br />
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