Maps illustrating an investigation of barrier pillars in the Western Middle field as part of the comprehensive study of mine-water problem in the anthracite region of Pennsylvania. Scale 1:4,500 feet. Included in the set is a graph (Figure 8) showing the relationships between pumping loads in the anthracite region of Pennsylvania with altitude on the x-axis and distance (in miles) from the Conowingo Portal on the y-axis. An explanation of the graph in Figure 8 (Figure 9) summarizes data from Bureau of Mines Technical Paper 727, Report of Investigations 4700, and Bulletin 513.

Maps showing the effects of barrier pillars on water flow in relation to mines in Lackawanna Basin, northern field of the Anthracite Region of Pennsylvania. Scale 1:4,500 feet.

Map that accompanies a report issued by the U.S. Bureau of Mines regarding a buried valley area (a deposit of clay, sand, and gravel) around the Susquehanna River in the anthracite region of Pennsylvania, near the city of Wilkes-Barre. This map indicates the relative positions of mines and other coal storages locations referenced in the report along with flooded regions and underlying coal measurings and workings.

Report documenting the suitability of Pennsylvania for plant locations to produce synthetic liquid fuels, based on raw materials, water sources, and local interest.

Report issued by the Bureau of Mines over an annual study of synthetic liquid fuel production. Results of the annual study are presented and discussed. This report includes maps, tables, illustrations, and photographs.

Report issued by the Bureau of Mines over studies conducted on low-temperature carbonization of coal. Methods and results of the studies are presented and discussed. This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines over mineral characteristics, uses, and problems. Descriptions of common minerals and their uses are presented and discussed. This report includes tables, maps, and illustrations.

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

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.

Report issued by the Bureau of Mines over testing conducted on nickel oxide to produce nickel metal. Details of testing methods and results are presented. This report includes tables, illustrations, and photographs.

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

Report issued by the Bureau of Mines over studies on the reserves of coking coal from Allegheny County, Pennsylvania. The results of the investigations and the different coal beds sampled are presented. This report includes tables, and maps.

Report issued by the U.S. Bureau of Mines on estimates of known deposits of coking coal in Cambria County, Pennsylvania. Studies on the properties of coal and coal blends from the area are presented. The report includes maps and tables.

Report issued by the U.S. Bureau of Mines on the known deposits of coking coal in Indiana County. The properties and characteristics of the coal and coal blends sampled are presented. The report includes tables and maps.

Report of investigations issued by the U.S. Bureau of Mines evaluating the known reserves of coking coal in Jefferson County, Pennsylvania. The properties of coal and coal blends from the area are analyzed. This report includes tables, and maps.

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 estimates of known reserves of coking coal deposits in Armstrong County, Pennsylvania. The properties of coal and coal blends from the area are presented. The report includes tables and maps.

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.

Report issued by the U.S. Bureau of Mines on the study of pumping at anthracite mines in Pennsylvania. The study was conducted in order to solve anthracite mine-water problems. The report includes maps, photographs, and illustrations.

Illustrations that accompany a report issued by the U.S. Bureau of Mines regarding a buried valley area (a deposit of clay, sand, and gravel) around the Susquehanna River in the anthracite region of Pennsylvania, near the city of Wilkes-Barre. Most of the images are cross sections of the area.

From Summary and Conclusions: "The objective of this investigation has been stated above in the Introduction. Studies were made of mining operations in the Athens Basin, Rafina and Oropos districts; the Kimi and Aliveri areas on the island of Euboea; and the Peloponnese in the vicinity of Kalamai. (See fig. 2). Mining practices at mines in these areas are summarized briefly in this report. Samples of lignite were shipped to Bureau of Mines experiment stations at Pittsburgh, Pa., and Golden, Colo., for washability and utilization studies."

From Summary and Conclusions: "This report deals with upgrading to metal-lurgical standards of large reserves of high-sulfur Pittsburgh coal remaining in southwestern Pennsylvania and northern West Virginia."

From Scope of Report: "In this report one major unwatering project was developed. Three pools that inundate considerable tonnages of anthracite reserves are close enough together to be unwatered by some centralized system. Three alternative plans were studied to estimate the cost of each."