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<br />1',) <br />CD <br />en <br />-J <br /> <br />.-------- Without <br />\'Ilih <br /> <br />~ <br />, <br />, <br />, <br />~-...' <br />~~ r <br />., <br />:;:, <br />.; <br /> <br />:',,<l! <br /> <br />I /' /-' <br />')'~I/-- <br />"'"I <br /> <br />v <br /> <br />I ~H<' 1 <br /> <br />2020 <br /> <br />?O.\O <br /> <br />I~'W <br /> <br />(>on ;Pln <br />\(,\1< <br /> <br />l'he figure iIlLJstr~ll~;s that a givon sillinity control <br />project will not fe,Jell its full potenticll until the <br />year 2000. SIJch i.I pr-ojection is required as an <br />initicll step III Ava!lJating the effects at salinity. <br />Due to tho l1lElny Llctors involved, the Colorado <br />River WiltEn Ollilllty (Jffien locatnd at the <br />[nqilleeriWJ illle! nesnach Center. Denver, has <br />the responsibilty of supplying procedul'us and <br />reviewing SHlilllty Irllpnct estimates for each <br />proposed pmject on tho Colorado River. <br /> <br />f:ollowinq uofinitillrlS of the pl1ysiccJI irnpact of <br />the proposeo project, whether it bfl ;:} salinity <br />co 11 t r 0 I III e il S lJ r e () r (-I wa tor r H sou r C G <br />developnlont schplne. the vLlI1JeS of $257,000 <br />and $343,000 "'8 simply multiplied by the <br />annLlal equlvall)llt salirlity impact. The result then <br />hecomes An illlfllJill cquivE1lent benoiit or cost <br />deponding UpOll tl1() typE: of project under <br />clflillysis. <br /> <br />For eXcHnple, (l~;SU:ll() n salillity rnitigcl1:ion project <br />which ultirnlltely r{)ducc~) salinity 1:1t Irnpcrifll Darn <br />by 1;> rng/I joll(lwinq nil in"itiC11 impact of <br /> <br />../ <br />l.! <br />n <br /> <br />8 mg/L. Derivation of the annual equivalent <br />salinity impact results In a value of '10.8 mg/I_. <br />Applying the economic estimate yields a total <br />annual benefit of $3.704,400 which is then <br />compared with annual ~'1uivalent project costs <br />in the economic justification section. <br /> <br />Because the benefit figures in this report are <br />based upon 1976 data. it will be desirable to <br />update these figures to be equivalent to current <br />cost estimates. It is recommended that the GNP <br />Implicit Price Deflator be used for this purpose. <br />Index values since 1976 are shown In the <br />tabulation below. As an example. total benefits <br />(damages) per milligram per liter in the first <br />quarter 1980 would be $343,000 <br />(174.5/133.7) ~ $447.700. <br /> <br />GNP <br />Year implicit <br />price <br />deflator <br /> <br />Incremental <br />direct + indirect <br />impacts <br />($/(mg/U I <br /> <br />'1976 133.7 <br />1977 141.7 <br />1978 152.0 <br />1979 '165.5 <br />'1980 174.5 <br />.nt'rr-n----------- -- <br />1 First quarter only. <br /> <br />343,000 <br />363,500 <br />389,900 <br />424,600 <br />447,700 <br /> <br />Any questions concerning procedures should be <br />dllected to the Colorado River Water Ouality <br />Office in Denver. <br /> <br />,/ <br /> <br />'\ <br /> <br />!' ~ <br /> <br />\ <br />-'j <br /> <br />GJ'O fl59- 03.<\ <br /> <br />19 <br /> <br />