After 85 years of service, the Bureau of Mines (USBM) closed in 1996. Certain functions, such as the collection, analysis, and dissemination of minerals information, have been returned to the Geological Survey (USGS). For information on former USBM programs or .

Mar 02, 2019 · pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indie acidity, whereas a pH of greater than 7 indies a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

Pennsylvania ZIP code map and Pennsylvania ZIP code list. View all zip codes in PA or use the free zip code lookup. ... Coal Center Washington County Area Code 724. 15424. Standard ... Dagus Mines Elk County Area Code 814. 15832. Standard Driftwood Cameron County ...

Illinois Department of Natural Resources Office of Mines and Minerals. Indiana. Indiana Department of Labor, Bureau of Mines. Indiana Department of Natural Resources – Active Mining Permits Map. Iowa. Iowa Department of Agriculture – Mines and Minerals Bureau. Iowa Department of Natural Resources – Interactive Coal Mine Map