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Show 54 ( Gates, 1965). One well close to the Lake yields water with more than 9,000 ppm dissolved solids. Skull Valley Groundwater Skull Valley is bounded on the east by the Stansbury and Onaqui Mountains, on the south by Davis Mountain, and on the west by the Cedar and Lakeside Mountains. Groundwater from Skull Valley drains northward, toward the mud and salt flats bordering the Great Salt Lake on the west side of Stansbury Island. Some wells in the southern part of Skull Valley obtain water from unconfined aquifers which are composed of sand and gravel. Other wells near Orr's Ranch and losepa encounter artesian aquifers ( Hood and Waddell, 1968). Discharge to the Great Salt Lake-- Hood and Waddell ( 1968) calculate that about 800- 1,600 acre- feet of groundwater flow annually from Skull Valley toward the Lake. Chemical Quality of Groundwater-- For the part of Skull Valley south of losepa, most of the groundwater contains dissolved solids ranging from 500 to 1,000 ppm. North of losepa and west of Timpie, the groundwater contains dissolved solids ranging from 1,610 to 7,850 ppm ( Hood and Waddell, 1968). Water in Storage-- Hood and Waddell ( 1968) state that Skull Valley can support some additional development based on groundwater supplies. They indicate that if the water levels of the entire groundwater reservoir were lowered by 100 feet, at least 2.3 million acre- feet of water would be obtained. This yield is 50- 80 times the estimated average annual |