Figures 2-9: Barrier Pillars in the Western Middle Field: Anthracite Region of Pennsylvania
Description:
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 Bu…
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Date:
1953
Creator:
United States. Bureau of Mines.
Location:
None
Partner:
UNT Libraries Government Documents Department