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Show Table 5- 3 EXISTING WATER SUPPLY ( PUBLIC AND PRIVATE) - 1995 Jordan River Basin PUBLIC WATER SUPPLY ( ac- ft/ yr) ( includes residential, commercial and industrial uses) Source Average Supply Reliable Supply ( 90% probability) Wasatch Range streams City Creek Parley's Creek Big Cottonwood Creek Little Cottonwood Creek Small mountain streams Subtotal Welby- Jacob Exchange Central Utah Project Deer Creek Reservoir Groundwater Artificial groundwater recharge TOTAL 8,310 8,890 25,920 21,670 3.400 68,190 29,400 70,000 61,700 114,400 5.800 349,490 6,080 5,210 20,020 17,340 1.100 49,750 17,500 84,000" 61,700 114,400 1.060 328,410 PRIVATELY DEVELOPED WATER SUPPLIES Use Description Supply ( ac- ft/ yr) Annual average Subtotal Private Self- supplied Industrial Agricultural Secondary Environmental Private domestic and stock wells Industrial wells Imported from Tooele County Surface and springs Irrigation ( primarily from Jordan River) Irrigation wells Lawns and gardens Developed wetlands and open water areas 24,600 26,500 10,000 3,200 140,000 3,000 10,000 94,500 24,600 39,700 143,000 10,000 94,500 TOTAL 311,800 ; ( a) Streamflow values are from the Salt Lake County Area- Wide Study and reflect 1940- 1980 base time period. ( b) The Central Utah Project is managed to bring up to 84,000 acre- feet of water into the basin during times of drought. The Jordan River has an average annual flow of about 308,000 acre- feet at the Jordan Narrows. As can be seen from Figure 5- 3, that amount includes the extremely wet years of 1983 through 1986. A close examination of Figure 5- 3 and Figure 5- 4 reveals that the flow of the Jordan River can drop below 200,000 acre- feet per year for an extended period of time, as was the case in the early 1930s and 1960s. In recent years, over 90,000 acre- feet of water rights in Utah Lake have been purchased for securing the storage right for Jordanelle Reservoir. In addition, over 40,000 acre- feet of water rights have been purchased by the Salt Lake County Water Conservancy District for the Welby- Jacob Exchange. Of the sources available, it is estimated that the surface water supply presently developed for irrigation in Jordan River Basin is about 140,000 acre- feet per year. This amount is consistent with the most recently completed landuse survey for the valley. For more information on this topic see Section 10, Agricultural Water. 5.3.2 Groundwater Groundwater is an important source of water supply in the Jordan River Basin. The current total groundwater supply is estimated to be 174,300 acre- feet per year. This includes all sources including public drinking water supplies ( 114,400 acre- feet), private domestic and stock watering wells ( 24,600 acre- feet), private agricultural wells ( 3,000 acre- feet), privately developed industrial wells ( 26,500 acre- feet) and 5,800 acre- feet of artificial groundwater recharge. Existing developed groundwater sources for each public water supplier are tabulated in Table 5- 6. Current groundwater withdrawals ( 1986- 1995) are 5- 5 |
