| OCR Text |
Show to store high spring flows of Mill Creek, Lambs Canyon, Parleys Creek, and Emigration Creek, as well as Dell Creek for later summer use. A distribution tunnel and pipeline would also be required. Under the present Corps of Engineers plan this reservoir would be used primarily to protect Salt Lake City from potential floods and for recreation, but a limited municipal water supply would be developed. The annual yield would be determined by its ultimate capacity as given in Table H- 5. Figure H- 2 is a map showing a local stream development possibility. The Corps of Engineers indicates that it presently has plans for a 30,000- acre- foot reservoir at the Little Dell site. There is a management alternative related to the timing of construction of Little Dell Dam and Reservoir with respect to the construction of Bonneville Unit. The yields for three sizes of Little Dell Reservoir, assuming construction both before and after the Bonneville Unit is given in Table H- 5. The yield would be higher if it were constructed before the Bonneville Unit, but the costs of delivering the water to the point of use would also be higher. If it were constructed now, the point of use for Little Dell Reservoir water would be west of the Jordan River, and the cost of a 36- inch concrete delivery pipe about ^ T » 000 feet in length would be approximately $ 6,000,000. If Little Dell Reservoir were constructed after the Bonneville Unit, the point of use would be east of the Jordan River and the water could be delivered through constructed facilities. Therefore, Little Dell Dam and Reservoir would best fit into the total development of the county if constructed after the Bonneville Unit. Argenta Reservoir on Big Cottonwood Creek would probably have a 20,000- acre- foot capacity. Argenta Dam and Reservoir would cost $ 18,^ 00,000, which would be $ 111 annually per acre- foot. A treatment plant and pipeline for delivering the water to the city system would also be required. The yield of high quality water from these facilities would be 8,1+ 00 acre*- feet from Little Dell and 9,800 acre- feet from Argenta, for a total of 18,200 acre- feet. The cost of this 18,200 acre- feet of water would be about $ 9^ per acre- foot, not including Bonneville Unit incurred costs. Additional municipal water could be obtained from Little Cottonwood Creek by direct diversion to Little Cottonwood 500 |
