Enola Yard
Enola Yard is a large rail yard located in East Pennsboro Township, Pennsylvania, along the western shore of the Susquehanna River at Harrisburg, Pennsylvania. It was the world's largest freight yard through 1956. The yard continues to operate today at lower traffic levels. Coordinates: 40°17′41″N 76°55′31″W / 40.294666°N 76.925336°W
The yard was built by the Pennsylvania Railroad (PRR) in 1905 with two hump classification yards. Initially the yard processed 7,000 cars per day. The westbound complex had a receiving yard with 20 tracks, and a 25-track classification yard. The eastbound complex had a 21-track receiving yard and 17 classification tracks. There were no separate departure yards.
Enola Yard was fully built out by the late 1920s, encompassing 316 acres and a capacity of 9,692 cars. Service buildings included a 43-stall roundhouse and a steel car shop. A yard to handle container freight was added to the complex in 1932.
The PRR rebuilt the component yards and installed automatic retarders, starting with the eastbound hump in 1938. The eastbound yard was electrified with 11,000-volt alternating current (AC) service. (See Amtrak's 25 Hz traction power system.) The westbound complex was rebuilt in 1944 with 16 receiving tracks and 35 classification tracks, followed by the eastbound complex, reconfiguring to 15 receiving tracks and 33 classification tracks. The average daily traffic load in 1939 was 11,207 cars, and this average increased during the approach of World War II, with 14,100 daily cars in October 1941. The record traffic level at the yard was 20,660 cars in one day during June 1943.
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