Geological Survey Water-Supply Paper 1475-F Ground Water at Grant Village Site Yellowstone National Park, Wyoming

Aquifer tests by bailing and pumping methods indicated that moderate amounts of water could be obtained from test wells 2 and 6. Therefore, the casing was left in place in these two wells, and steel caps were welded over the tops of the casings. If water supplies are needed from these wells, the caps can be removed easily. Test well 2 should yield about 30 to 35 gpm of water at a temperature of nearly 100°F. The fluoride content of the water is very high, and the iron content is higher than the recommended limit for domestic supplies. The water would require treatment to remove the iron and cooling before it would be satisfactory for domestic purposes. About 15 gpm of water having a temperature of about 45 to 50°F could be obtained from test well 6, and the yield possibly could be increased by perforating the casing in the interval from 55 to 77 feet. The water from this well is of relatively good quality, but it may need treatment to remove iron.

Additional ground-water supplies might be located by exploring the area along the lakeshore east of test well 6. Water of moderate temperature and fairly good quality might be obtained from wells drilled near the lakeshore between test wells 5 and 6 and immediately east of test well 6. Larger yields than those obtained from test wells 5 and 6 probably could be obtained from gravel-packed or suitably screened wells of large diameter. The area along the lakeshore between test wells 3 and 5 also might be explored. However, this area does not seem to be too favorable because of the high fluoride content of water obtained from test wells 2 and 3, the very high temperature of the water tapped in test well 1 and auger hole 2, and the low yields of test wells 3 and 4.