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<br />iX-r <br /> <br />Annual Net Benefit (Column 12) <br />rheannllal netoenefit is the difference between the benefits of theaMllal <br />damage reduction and the annual cost of im~roYements (Co lumn 10 - Co lumn 11). <br /> <br />Present ~orth of Net Benefits (Column 13) <br />Tne presentwortnuf the net oenefits is the result of thecontlnuous com- <br />pounding of tne annual net oenefit assuming a uniform flow and a 58. year com- <br />poundiny period witn an interest rate of 8-1/~ percent. <br /> <br />Benefit/Cost Ratio (Column 14) <br />The oenefit/cost ratio is the average annual damage reduction (Column 11)) <br />divided by tne annual im~rovements cost (Colllmn 11). <br /> <br />The benefIt/cost ratio shows the relative economic merit of eaCh alternative. <br />Eyaluation of the secondary and intangible benefits is also an important con- <br />sioeration in the decision ma~ing process. <br /> <br />Annual Cost (Column 15) <br />rile annual cost is the anticipated total annual cost for the alternative, <br />sometimes referri!d to as the total cast to saciety. It IS the re<;idual <br />ayerdgeannual flaod damage cost in aooitiontotneannual improy",mentscosT. <br />(Co lum" q ~ Co lumn 11). <br /> <br />FLOOD ~MRNING SYSTEM <br /> <br />rhe tlood warnin!l syst<lm was riot lnclurj~~ In th<l llen"fi~/(Ost ey~l~ation. <br />SinceawJrningsysto'll1woulab"nefitth",eotirestudyaredOfCltldr Creek it <br />cou 10 not be compdr~o on a r"'dCh O)y re<lC~' bas is along witn the ot~er d I ter- <br />oat i Yes. [n ddd i t IOn, 5 i nce th~ cost of a flood w~rn i ng sys tem wou I d b<l <br />Sndro!d tnro~gh()ut th," OdS in, the cos t pr,"sentea in Tat> It! lX-j r<,pr<,sents t"e <br />""st imated cost ta be oorn~ by the locd 1 gov.ornm",nts ill tll," Cledr Cree~ - <br />Voullgfiela tnrou~h Goloen ,tJdy ar<la. Also, oecau<;.:! of tne nature of tne <br />warn i ng sy<; te~1 ano the ullcerta i nty of tn~ r<lsponse to flood warn i ng" it <br />wO'Jla 0<.' <!~tr~m"ly difficult to e,timdu tn<l dmount of ddlTIage rductlons tr.Jt <br />might r~su it sho~ 1 Ii tn,s sys tem be put i n~o ef feet. fhe t>en~f 1 ts Of a f 10?d <br />warning <;y>t~", ar~ uiscu$.ed in ddJll In Section X. <br />