Report issued by the Bureau of Mines over studies conducted on flood-prevention developed for mine systems. A history of flood prevention procedures as well as updated flood-prevention is presented. This report includes tables, graphs, maps, photographs, and illustrations.

Report issued by the Bureau of Mines over investigations of coking-coal reserves of Greene County, Pennsylvania. Methods used, and measurements of coal reserves are listed. This report includes tables, and maps.

"This report tells the lessons learned from the second refueling of the Shippingport Atomic Power Station."

Report issued by the U.S. Bureau of Mines regarding an investigation of the reserves of coking coal in Somerset County, Pennsylvania. The report includes tables and maps representing different coal beds within Somerset County.

Report issued by the U.S. Bureau of Mines on the estimate of the known reserves of coking coal in Westmoreland County, Pennsylvania. The report evaluates the properties of coal and coal blends from the area, and includes tables, and maps.

Report issued by the U.S. Bureau of Mines on the known reserves of coking coal in Fayette County, Pennsylvania. Studies on the properties of coal and coal blends from the area are presented. This report contains tables, and maps.

The model discussed in this report simulates recharge to, flow through, and discharge from the water-table aquifer representative of most of Chester County, Pennsylvania. It includes maps and graphs.

This report evaluates and describes the effects that strip mining the Anna S. Mine has on the water quality of Babb Creek in Pennsylvania. It includes maps, graphs, and tables.

Samples of water, fish, and benthic macroinvertebrates collected at 10 sampling stations over a 10-month period indicate that Sacony Creek and its major tributaries possess water of good to excellent quality. No excessive quantities of dissolved nutrients, oxidizable matter, or fecal coliform bacteria were detected. Fish inhabitants include a sizable wild trout population in the upper Sacony basin and a diverse warm-water population, dominated by white suckers (Catostomus commersoni), in the lower basin. A population of 590 trout or 119 pounds per acre (133 kilograms per square hectometer) was estimated for good habitat in the upper basin. A maximum standing crop of 558 pounds per acre (626 kilograms per square hectometer) was measured at' one of the more productive reaches. Benthic macroinvertebrate collections tended to support the water chemistry and fish population studies. Diversity (d) and Redundancy (r) ranged from 2.44 to 3.46 and 0.14 to 0.38, respectively. Such diversity and redundancy values indicate good quality water at all stations.

Discussing the occurrence of uranium in the Harrisburg Quadrangle

Discussing the chemical analysis of the Harrisburg Quadrangle

Results of reconnaissance surveys of the Harrisburg quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Discussing uranium occurrences in the Harrisburg Quadrangle