https://www.pa1call.org
Since its inception in 1972, Pennsylvania One Call System has increased its membership from 6 utilities in one county to over 3,660 underground facility owner/operators in all 67 counties from the following industries: cable television, electric, gas, propane, Marcellus shale, pipeline, sewer, telecommunications, telephone, water and government, including state, county, city, borough, townships of the 1st class, townships of the 2nd class, and municipal authorities. Members also include private master meter companies, manufactured housing communities, and private entities, such as schools, hospitals, manufacturing sites, and others owning underground facilities which cross public roads.