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Map of coal-mining features, Allegheny County, Pennsylvania Map of coal-mining features, Allegheny County, Pennsylvania
This map is one result of a series of studies sponsored by the Appalachian Regional Commission as part of a larger U.S. Geological Survey program of environmental analysis of a part of southwestern Pennsylvania. The map summarizes surface features resulting from coal mining. The distribution of surface features is largely from 1973, 1:12,000 scale aerial photographs verified by field
Map showing configuration and thickness, and potentiometric surface and water quality in the Madison Group, Powder River basin, Wyoming and Montana Map showing configuration and thickness, and potentiometric surface and water quality in the Madison Group, Powder River basin, Wyoming and Montana
With development of the coal resources of the Powder River Basin of Wyoming and Montana the demand for water will increase greatly. The study upon which this report is based was designed to make a preliminary evaluation of the available geo-hydrologic data for the Madison Group, which is an extensive aquifer underlying the Powder River Basin. Large yields from a few wells tapping the...