on September 21, 1958. West End lines The replacement of the Point Bridge with the Fort Pitt Bridge precipitated the abandonment of many routes to the West End, all on June 21, 1959. PRC was engaged in ongoing litigation over the failure of the Pennsylvania Public Utilities Commission to provide streetcar tracks on the new bridge. In the end the company was allowed to abandon of street track in situ and was awarded $300,000 as compensation. The litigation marked the beginning of significant abandonments: 90 percent of the network was dismantled over the next decade. Interurban PRC Interurban Division ran an interurban trolley system linking Pittsburgh with towns in Washington County such as Washington, Charleroi and Roscoe. Charleroi The origins of the Charleroi interurban line began in 1895 in Monongahela City, with the construction of a small street railway by the Monongahela City Street Railway Company. In 1900 the line was extended north to Riverview and in 1901 extended south to Black Diamond Mine. Here it turned inland, south along Black Dam Hollow (the former roadbed is now known as Trolley Lane). It met the northern end of the newly constructed (1899) Charleroi & West Side Street Railway at the now-disused Lock number 4 in North Charleroi. The Charleroi interurban line was cut back to the Allegheny County border at Library (Simmons loop) in June 1953 It continued to operate until the 1980s as 35 Shannon-Library and became the southern portion of 47L Library via Overbrook when Light Rail Vehicles (LRVs) replaced trolleys. The trolley loop was removed in 2004. In 2010 this line became the Blue Line – Library, and in 2020 was renamed the Silver Line - Library. Washington The Washington line was cut back to the county boundary at Drake in August 1953 and eventually became the 36 Shannon-Drake. This in turn became the southern portion of 42 South Hills Village (excluding the new link from Dorchester to South Hills Village, which was built in 1984). The final portion of the interurban from Dorchester to Drake was renamed 47 Drake, finally closing in 1999 and bringing to an end PCC Streetcar operation in Pittsburgh. Diversification The company acquired G. Barr & Co., a manufacturer of aerosol cans, in 1962, and bought Alarm Device Manufacturing Company (Ademco) in 1963. It received $16.558 million for the sale of the streetcar system to the Port Authority in 1964. In 1967,