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<br />10. POTENTIAL IRRIGATION PROJECTS
<br />
<br />Potential projects to provide irrigation supplies for "new lands" and
<br />supplemental water for lands now inadequately irrigated, tO€,'6ther with estimated
<br />construction costs, may be summarized from the Report, as follows:
<br />
<br /> ACRES TO BE BENEFI'ITED ESTIMATED
<br /> NEW SUPPLE- CONSTRUCTION
<br /> LAN:OO MENl'AL COMBINED COSTS
<br />ARIZONA 18,680 6,000 24,680 $ 1,628,000
<br />COLORAlXl 471,300 192,700 664 , 000 107,262,000
<br />NEW MEXICO 149,960 15,100 165,060 41,882,000
<br />UTAH 168,780 161,160 329,940 41,373,000
<br />WYOMING 291,330 95,360 386,690 46,600,000
<br />UPPER BASIN (a) 1,100,050 470,320 1,570,370 $238,745,000
<br />ARIZONA 159,050 587,600 746,650 $1,85,000,000
<br />CALIFORNIA 16,000 16,000 3,100,000
<br />NEVADA 43,100 4,500 47,600 16,500,000
<br />NEW MEXICO 2,000 10,000 12 ,000 13,300,000
<br />UTAH 13,000 8,200 21,200 9,100,000
<br />LOWER BASIN (b) 233,150 610,300 843,450 $527,000,000
<br />COLO. R. BASIN 1,333,320 1,080,620 2,413,820 $765,745,000
<br />
<br />(a) ExclUSive of lands outside of natural basin to be served by export
<br />diversions .
<br />(b) Including lands in basin of Salton Sea in California, and lands in Gila
<br />River Basin in Central Arizona to be supplied from Colorado River.
<br />
<br />11. DISCUSSION OF POTENTIAL IRRIGATION PROJECTS.
<br />
<br />!and classification surveys' of Bureau of Reclamation (not shown in Report)
<br />disclose 706,480 acres of arable lands (class 1 and 2) awaiting reclamation
<br />by irrigation in Western Colorado, as compared with 471,300 acres thereof to
<br />be irrigated by the potential projects listed in the Report.
<br />
<br />Unit costs of construction per acre irrigated, or per acre foot of
<br />water, are not given in the Report. Nor does the Report disclose the irrigation
<br />benefits nor the amounts which water users may be expected to repay. Construc-
<br />tion costa, per acre benefited, are equivalent to an avel~ge of $152 per acre
<br />in the Upper Basin, and $625 per acre in the Lower Basin. In terms of new
<br />land to be irrigated, the construction costs average $216 per acre in the
<br />Upper Basin, and $2,260 per acre in the Lower Basin. In Colorado the construc-
<br />tion costs of potential irrigation projects average $162 per acre benefited and
<br />$228 per acre of new land irrigated.
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<br />(16)
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