OCR Text |
Show PART XII ALTERNATIVE LEVELS OF DEVELOPMENT No. 3-State Alternative--Water Supply Available at Site Development which would be possible if the states of the Upper Colorado Region could utilize water which would be physically avail- able at site of project development is described briefly below. There has been no agreement between the states or within the states that this can be accomplished in the way indicated, but rather this discussion indicates utilization of water that is physically available for development. It is contemplated that there would be shifts between types of use as the needs develop. The plan would require substantial augmentation to meet Colorado River Compact requirements for delivery at Lee Ferry. If the Colorado River is augmented below Lake Powell, exchange arrangements would have to be made. Proper consideration of possible detriment to power revenues and of augmentation costs will be required. Additional uses of 1.28 million acre-feet above the 8.16 m.a.f. level are described briefly by state, and summaries for total uses are shown in tables 18 and 19. Arizona retained its allotment of 50,000 acre-feet for 2020 with no changes. Colorado has identified additional uses by 2020, which would increase export to the eastern slope of the Rockies by 113,000 acre- feet annually and increase irrigation use by 69,000 acre-feet, primarily in the Upper Main Stem subregion. New Mexico water depletions would increase 228,900 acre-feet, primarily for electric power, irrigation, and export to the Rio Grande Basin. Water depletions for mineral processing would be decreased about 40 percent. Additional developments in Utah would all occur in the period 2001-2020. Irrigation projects not previously incorporated in plans would require over 200,000 acre-feet of water; coal conversion would double and require 22,300 acre-feet more water; and an additional 100,000 acre-feet would be exported to the Great Basin Region. Projected depletions of the Colorado River system by Wyoming total 1,588,000 acre-feet, which is 545,000 acre-feet more than at the 8.16 million acre-feet level of development. Increases in depletions are limited to municipal and industrial water supply (primarily minerals) and export. 64 |