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<br />Design
<br />Fre-
<br />quency
<br />
<br />Flood
<br />Plain
<br />Area
<br />(acres)
<br />
<br />Do
<br />Nothing
<br />
<br />350.2
<br />
<br />T^OI r:' r I,
<br />'MUL.L. 1-,
<br />
<br />AL TERtJATE CO/WAR I SOtJ- LEtiA GULCII
<br />PHASE A
<br />
<br />Flood
<br />Plain
<br />Reduction
<br />(acrp.s)
<br />
<br />Bene-
<br />fit
<br />Cost
<br />Ratio
<br />
<br />Benefit
<br />Cas t Ra t i 0
<br />\lith Intangible
<br />& Tax Benef it
<br />
<br />Annual
<br />Damage
<br />Reduction
<br />
<br />Tax
<br />I ntan- Ben-
<br />gibles efit
<br />
<br />Capi-
<br />ta 1 i zed
<br />Cost
<br />
<br />Annual
<br />Damages'"
<br />
<br />Annual
<br />Costs
<br />
<br />749,000
<br />
<br />749,000
<br />
<br />$
<br />
<br />Grass 10 276.0 74.2 215,500 543,500 735,600 0.74 217,100 13,000 1.05 $ 9 ,806 ,800
<br />Li ned
<br />Channe 1 25 266,1 84.1 98,900 660,100 657,700 I. 00 217,100 14,900 1,36 $8,768,300
<br /> 100 11 Q ~ 001 ~ /., 1M 717,900 708,700 1.01 217,100 3i , i 00 1 ,~ $0 /'/'8 "01"\
<br /> I I U ,v L..J l . U ,I,! uv I. ..JV ~,-r, ,'" v
<br />
<br />improved 10 32 j .2 29.0 '^^ ,^^ '^^ 660,000 ^. A^^ e' $8,7"38,900
<br />LfUj10UU 355,LfUU 0,)4 3,OU0 . )~
<br />Flood
<br />Plain 25 315.0 35.2 311,700 447,300 583,000 0.77 4,800 .78 $7,772,400
<br /> 100 301,9 48,3 242,700 516,300 550,500 0.94 6.700 ,95 $7.339.100
<br />
<br />Estimated
<br />Optimum
<br />Combination
<br />
<br />, A
<br />,V
<br />
<br />297.0
<br />
<br />25
<br />
<br />288.7
<br />160.1
<br />
<br />100
<br />
<br />53.2
<br />
<br />232,700 526,300 644,600 0.82 89,800 7,900
<br />
<br />A"
<br />. J/
<br />
<br />$8,533,600
<br />
<br />" e
<br />OJ. )
<br />
<br />112,800 646,200 549,5001.18 89,800 9.500
<br />
<br />1. 36
<br />
<br />$7,325,800
<br />
<br />190,1
<br />
<br />48,800 710,200 560,600 1.27 89,800 24,000
<br />
<br />,
<br />0'
<br />
<br />1 .47
<br />
<br />$ 7,473 ,800
<br />
<br />Based on aggregate probable da~ages
<br />
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