1898 - Coalmininghistorypa.org

No. 11. SECOND BITUMINOUS DISTRICT. 317163,450 cubic feet per minute, and same was well distributed aroundthe workings. Mine i^oreman, Robert Hay.Standard Slope.—Idle the entire year.Mines on and Near the Sewickley Branch of the South West PennsylvaniaRailroad.Mammoth Shaft and Slope.—These mines have been kept in goodcondition during the year. One fan ventilates both mines and wasproducing when last measured, 117,000 cubic feet of air per minute,which was fairly well conveyed to the face of the workings. Mineforeman, David P. Brown.Noticeable among the improvements made by coke companiesthe changing of the haulage arrangementsduring the year 1898, isat the bottom of the Mammoth Shaft mine, owned and operatedby the H. C. Frick Coke Company. Mr. J. P. K. Miller is the chiefengineer of the above named company, and furnishes the followingexplanation of the changes made:MAMMOTH IMPROVEMENTS.Mammoth Works.—Consist of a slope and shaft operation,withthe accompanying ovens and buildings. With regaid to the mineworkings the shaft is located on No. 1.5 face heading, 250 feet to theright of the main slope heading.This heading is also continued below No. 15 face as the main shaftdip heading. The coal is brought to the shaft by tail rope haulage.The engines operating which were upon th