Some other lines were planned, but never completed: The Pennsylvania and Newark Railroad was incorporated in 1905 to build a low-grade line from Morrisville, Pennsylvania, to Colonia, New Jersey. It was never completed, but some work was done in the Trenton area, including bridge piers in the Delaware River. North of Colonia, the alignment was going to be separate, but instead two extra tracks were added to the existing line. Work was suspended in 1916. A low-grade line was planned between Radebaugh (near Greensburg) and Derry, Pennsylvania. Work was begun on this line, but it was never completed. A low-grade route across the Allegheny Mountains of Pennsylvania, bypassing the congestion at Pittsburgh, was contemplated but never built. It would have used existing segments of the Northern Central Railway, Philadelphia and Erie Railroad, and Allegheny Valley Railway's Low Grade Division. Then, new construction would have connected from Red Bank to the Fort Wayne Line at Enon. The Western Allegheny Railroad later ran over a route similar to the envisioned new line, and was for a time owned by the Pennsylvania Railroad, which, it seems, purchased it for this planned bypass. Electrification Early in the 20th century, the Pennsy tried electric power for its trains. Its first effort was in the New York terminal area, where tunnels and a city law restricting the burning of coal precluded steam locomotives. In 1910, the railroad began operating a direct current (DC) 650-volt system whose third-rail powered Pennsy locomotives (and LIRR passenger cars) used to enter Penn Station in New York City via the Hudson River tunnels. The next area to be electrified was the Philadelphia terminal area, where Pennsy officials decided to use overhead lines to supply power to the suburban trains running out of Broad Street Station. Unlike the New York terminal system, overhead wires would carry 11,000-volt 25-Hertz alternating current (AC) power, which became the standard for future installations. On September 12, 1915, electrification of the line from Philadelphia to Paoli, Pennsylvania, was completed. Other Philadelphia lines electrified were the Chestnut Hill Branch (March 30, 1918), White Marsh (1924), the main line to Wilmington, Delaware (September 30, 1928), West Chester (December 2, 1928), Trenton line (June 29, 1930), and completed on July 20, 1930 the Schuylkill Branch to Norristown, Pennsylvania, later followed by the rest of the main line to Trenton, New Jersey. In 1928, PRR's president William Wallace Atterbury announced plans