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2201 EVERETT AVE SEPA 018 - 008 Drainage Report 2025-04-15
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2201 EVERETT AVE SEPA 018 - 008 Drainage Report 2025-04-15
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Last modified
4/15/2025 8:05:08 AM
Creation date
4/15/2025 7:52:34 AM
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Address Document
Street Name
EVERETT AVE
Street Number
2201
Tenant Name
SEPA 018 - 008
Address Document Type
Drainage Report
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C, Lawn, Flat .14 <br /> Pervious Total 0.14 <br /> Impervious Land Use acre <br /> ROOF TOPS FLAT 0.43 <br /> DRIVEWAYS FLAT 0.33 <br /> SIDEWALKS FLAT 0.07 <br /> Impervious Total 0.83 <br /> Basin Total 0.97 <br /> Element Flows To: <br /> Surface Interflow Groundwater <br /> ANALYSIS RESULTS <br /> Stream Protection Duration <br /> Predeveloped Landuse Totals for POC #1 <br /> Total Pervious Area:0.01 <br /> Total Impervious Area:0.96 <br /> Mitigated Landuse Totals for POC #1 <br /> Total Pervious Area:0.14 <br /> Total Impervious Area:0.83 <br /> Flow Frequency Return Periods for Predeveloped. POC #1 <br /> Return Period Flow(cfs) <br /> 2 year 0.408305 <br /> 5 year 0.552783 <br /> 10 year 0.658486 <br /> 25 year 0.803924 <br /> 50 year 0.921196 <br /> 100 year 1 .04638 <br /> Flow Frequency Return Periods for Mitigated. POC #1 <br /> Return Period Flow(cfs) <br /> 2 year 0.361934 <br /> 5 year 0.494973 <br /> 10 year 0.593067 <br /> 25 year 0.728886 <br /> 50 year 0.839009 <br /> 100 year 0.957078 <br />
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