Commercial coal mining in Greene County began in 1902 when the Dilworth Coal Company produced 36,400 tons of Pittsburgh coal from its mine at Rices Landing on the Monongahela River. Chartered in August 1901 and capitalized at $300,000, the company was directed by H.P. Dilworth, Frank E. Richardson, Newton Hemphill, and J. Marshall Lockhard of Pittsburgh, with H.P. Dilworth as president, George M. Dilworth as secretary, and C.B. McLean as treasurer. The mine stood on a 150-acre tract and initially drew coal from an 800-acre area along the river. Soon after the company was chartered, development began, and by November 1901 an air shaft and a hoisting shaft, each 145 feet deep and about 300 feet apart, had been sunk to the ten-foot-thick Pittsburgh or river vein of coal. To house laborers and miners, the company built 45 houses and planned 50 more, and by March 1902 it had invested about $400,000 in the enterprise. All coal was shipped by company boats to the Pittsburgh market. By 1905, the Dilworth Mine was the only mine listed in the bituminous section of the Annual Report of Pennsylvania's Department of Mines for Greene County, and that year it produced 105,000 tons of coal from the Pittsburgh seam, employed 128 men, and operated under superintendent James Black. In 1914, the Rices Landing Coal and Coke Company acquired the mine and 190 coke ovens along the river, and a few years later sold them to the H.C. Frick Coke Company. The mine continued operating after World War I, when many mines had closed and the industry was declining, and it produced coal until closing in 1928. United States Steel Corporation reopened it in 1974 with different entrances, Consolidation Coal Company bought it in 1984, and it closed in 2002.