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<br /> <br />o <br /><-:J <br />W <br />~ <br />c.',' <br />~ <br /> <br />DEPLETION OF SURFACE WATER SUPPLIES <br /> <br />15 <br /> <br /> <br />gener~lly in the order of one-half of the depletion resulting from the <br />service to new lands. If, therefore, one-half of the area of the lands <br />given I;lupplemental service be added to the area of new lands in each <br />project, the subsidies required for new land or its equivalent can be <br />computed. The effect of doing so and of including the subsidy due <br />to waiver of interest is shown in the following tabulation: <br /> <br />Subsidies for Gunnison River projects <br />A totail area of 189,000 acres is included within the 18' projects in <br />the Gunl.)ison River Basin investigated by the Bureau of Reclamation <br />during the past 10 years, of which about one-half is land now being <br />irrigated lbut which would be benefited by the delivery of supple- <br />mental Witter or regulation of existing supplies. The total construc- <br />tion cost : chargeable to irrigation would be $90 million, an .average <br />of $476 per acre of all land included in these projects.. . <br />The required subsidy, disregarding the subsidy arising out of waiver <br />of interes~, would be less than $200 per acre in the case of only 3 <br />projects having an aggregate area of about 20,000 acres. Subsidies <br />exceeding :$300 per acre would be required to expand the area to <br />60,000 acres, and if as much as 150,000 acres of new land and supple~ <br />mental service land were included in the projects, some subsidies <br />would have to be as great as $500 per acre. The Bureau of Reclama- <br />tion estiml\,tes that III the case of seven of these projects the water <br />users could not pay all costs of operation and maintenance~ <br />When th,e subsidy due to waiver of interest is added, the relation <br />between the required subsidy per acre of new land or its equivalen.t <br />and the re$ulting depletion of the contribution by Gunnison River <br />to the total flow. of Oolorado River is as shown on the following table: <br /> <br />Relation of subsidies to depletion, main stem of Colorado River <br /> <br />Total area of <br />new land or <br />equivalent <br /> <br />Maximum subsidy per acre of new land or equivalent: <br />$200._______._.__.__.____._._.__..____.______._____.__.______.____.__ <br />$400_ _... _ _. _. _' _ _____.. ___. _. ___ _ _ _ _____ _ __.. _ _c_ ____. __.. _ __ _. ____. <br />$600. _ _ _ c_ _' _ _ _ __ ______ _. ____ _ ____ _ _ _____. _ ___. ___ _.m ___. _ __ _ _ _____ <br />$BOO___.._____._.._.______._____.____...____________._____..___.___._ <br />$1,000__+ __ __ _ __ __ _ ___ __ ___ ___. ____ __ _ __ __ _ __ _ _ __ _ __ __ _ ___ ___ __ _____ <br /> <br />Acres <br />7,000 <br />62,000 <br />113,000 <br />130,000 <br />140,000 <br /> <br />Relation of subsidies to depletion Gunnison River Basin <br /> <br />Resulting de- <br />pletion of <br />streamflow <br /> <br />AcreMfeet pcr <br />year <br />10,000 <br />87,000 <br />158,000 <br />182,000 <br />196,000 <br /> <br /> <br />,," <br /> <br />'} v, <br />1,,"> <br />r <br /> <br />r <br />'. <br />. <br /> <br />Total area of Resulting de- . ,~ . <br />new land or Eletlou of <. <br />eqUivalent s reamftow :-' <br /> ; . <br />Acres Acre-Ieet per <br />year <br />6,000 8,000 <br />27 r 000 38, 000 <br />86,000 119,000 <br />125,000 175,.000 <br />140, 000 196,000 <br /> <br />Maximum subsIdt per acre of new land or equivalent: . <br />$200_.____._.____._._.___._.__.______________,____.____.__..____,____ <br />$400_.__.._.__:______._________._._____.____._.._____________________ <br />$600_______.._.,_._.___._._.____.____________________.____._..__.__.. <br />$800____._.____.__._.._._____.______._.___._.______._____.__.___.__._ <br />$1,000___ _ _. _._.:. _ __ __. _' ___ __ _ _ ___. _ _ _ _ __ _. _ _ _ _ __ ____ .__.: __. _ ____ __ <br /> <br /> <br />f." <br /> <br />-- <br />