OCR Text |
Show 59 Paleozoic and Precambrian age. Discharge to the Great Salt Lake-- Hood ( 1972) calculates that about 9,000 acre- feet of groundwater discharge to the Lake each year from this area. Chemical Quality of Groundwater-- Hood ( 1972) states that the known and inferred areas in which fresh water may be obtained are in the mountain uplands, the small valley around the townsite of Promontory, and a narrow strip of land along the base of the mountains. In the rest of the area, the groundwater ranges from slightly to very saline. Most water in near- surface deposits at the strand of the Lake is probably a brine. Water in Storage-- Large- scale development of groundwater in the Promontory Mountains area is unlikely. Rozel Flat has groundwater of poor chemical quality. In the southern part of the Promontory Mountains, shallow wells in the mouths of some of the small canyons might obtain scant supplies of fresh or usable water, but large withdrawals would probably induce saline water migration from the lakeshore or from depth ( Hood, 1972). Hood recommends that further detailed study should be made along the flats near Bear River Bay and the adjacent alluvial slopes because a small increase in withdrawals of groundwater might be feasible in that area. Thermal Waters Most shallow wells ( less than 500 feet deep) yield water of about the same temperature as the mean annual air temperature of the surrounding area. If the water is significantly warmer ( 10- 15 degrees Fahrenheit) it is an indication that the waters have been geothermally warmed. Such |