The H.C. Frick Coke Company's Standard Shaft-Mine and Coke Works was in operation from about 1883 until 1931. The original mine, called Standard Shaft No. 2, employed 936 men and produced 300,000 to 400,000 tons of coke per year, making it one of the largest operations in the country at the time. Henry Clay Frick thought so highly of this operation that he displayed a large-scale model of the plant at the 1893 World's Fair in Chicago. In 1901, Standard Shaft No. 3 mine was established another half mile north of the No. 2 mine. These two operations were combined and renamed Standard-Shaft in 1920.