Report of Subcommittee on Road Beds, based on data secured from inspection of 17 mines in Pennsylvania, West Virginia, Ohio and Illinois; ballast material; depth under ties; tamping; causes of deterioration; typical installations; importance of drainage; ditch location; tie "pumping"; wet road bed installation; track standards.
Ballast and drainage for coal mine haulage roads
Min Congress J
Mining Congress Journal ; 24 , n 3
1938
2 pages
Aufsatz (Zeitschrift)
Englisch
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Ballast and drainage for coal mine haulage roads
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