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FLOOD01675
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Last modified
1/29/2010 10:11:47 AM
Creation date
10/4/2006 10:16:14 PM
Metadata
Fields
Template:
Floodplain Documents
County
Arapahoe
Adams
Community
Aurora
Stream Name
Westerly Creek
Title
Major Drainageway Planning
Date
2/1/1977
Prepared For
UDFCD
Prepared By
Camp Dresser & McKee
Contract/PO #
&&
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />TABl.E 8 <br /> <br />Summary of Cost - Benefit An;Jlysis <br /> <br />"Jpstream Storage Plus <br />Channel Improvements <br /> <br />Item <br /> <br />Upstream <br />~!,~.r~~_ <br /> <br />;'-yr <br />~~!~~~~~}~ <br /> <br />lO-yr <br />S:h.~~l <br /> <br />25-'yr <br />Ch2~,nel <br /> <br />lOO-yr <br />Ch anne1 <br /> <br />ApproxilIate flooded Are11 <br />Reduced (Acres): <br /> <br />lOO-yr fj.ood <br /> <br />41 '-1 62 !l4 122 <br />.,. <br />50 92 114 Ll2 13/, <br />~: ~ I08 120 12'0 121 <br />.'~ <br />i,7 87 87 B8 B!I <br /> <br />25-y r flood <br /> <br />10-yr flood <br /> <br />5-yr flood <br /> <br />Ap'proximate Flooded Area <br />:"educed (%): <br /> <br />100-yr flood <br /> <br />23 30 35 48 69 <br />32 60 74 86 B7 <br />1,1 !l3 92 9.2 93 <br />51 95 95 96 96 <br />39 HI 84 87 90 <br /> ] .19 l.18 1.00 0.71 <br /> C.HO 7.75 6.50 4.00 <br /> <br />25-yr. flood <br /> <br />10-yr flood <br /> <br />5-yr flood <br /> <br />Reduction in Average Annual <br />Damages (%) <br /> <br />Incremental Benefit - COSI: <br />Ratios <br /> <br />Incremental Rate of Return <br />on Investment CO <br /> <br />.-30- <br />
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