WEST PENN ELECTRIC CO.
Incorporated 1925 to consolidate the electric utility companies owned by American Water Works & Electric Co. In 1948 became separate new company.
Potomac Edison Co.
Cumberland MD, Frederick MD, Hagerstown MD, interurban lines
Acquired 1923 by American Water Works & Electric Co.
Remaining bus operations sold to Greyhound 1955
West Penn Railways Co.
Connellsville, Greensburg, Latrobe, McKeesport, Uniontown, Wheeling WV, interurban lines
Acquired 1917 by American Water Works & Electric Co.
Transit operations discontinued 1952
Monongahela West Penn Public Service Co.
Clarksburg WV, Fairmont WV, Morgantown WV, Parkersburg WV, Marietta OH, interurban lines
Acquired 1923 by American Water Works & Electric Co.
Transit operations discontinued 1944
West Penn Electric Co. evolved to the Allegheny Power System.