Cedar Hill Yard

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Cedar Hill Yard is a large freight yard near New Haven, in the Cedar Hill area of New Haven, North Haven, and Hamden, Connecticut. Built by the New York, New Haven and Hartford Railroad in the 1890s, it opened in December 1894 with room for about 400 railroad cars.

Key milestones
- 1913–1915: Electrification of the yard is completed.
- 1917–1920: The yard is greatly expanded along both sides of the Quinnipiac River, adding two sorting humps. The goal was to handle more traffic for World War I.
- 1920: The expanded Cedar Hill Yard is finished and becomes the largest yard east of the Mississippi in the United States, with a design aimed at sorting thousands of cars per day.
- 1920s–1930s: The yard is modernized with improved control systems and equipment, making it one of the busiest in the country.
- World War II era: Cedar Hill handles thousands of cars daily, peaking around 5,000 cars in a 24-hour period during busy days.
- Postwar decline: Freight traffic shifts to trucks and heavy industry declines, reducing the yard’s importance. The New Haven Railroad goes bankrupt in 1961.

Changes in ownership and operation
- 1968: The nearby Selkirk Yard opens, drawing away traffic. Car float service to New York City ends.
- 1969: Penn Central takes over the yard after buying the New Haven Railroad; catenary is removed and one of the two humps is shut down to save money.
- 1970s: Penn Central falters, and the Poughkeepsie Bridge fire in 1974 cuts a key link to the rest of the country.
- 1976: Conrail takes over operations (the government-created railroad). Some improvements are made, including track work and job-shifting to the newer Selkirk yard.
- 1978–1980: Amtrak gains a foothold, using part of Cedar Hill for maintenance of way and storage. The western hump is eventually closed in 1980, and hump operations end entirely in 1980.
- 1980s–1990s: Conrail and Amtrak continue to use and portion out Cedar Hill. Mercury contamination is found in 1988, leading to investigations and cleanup efforts. A brief railroad strike in 1991 highlights national labor tensions.
- 1992: Amtrak establishes a maintenance of way base at Cedar Hill.
- 1999: CSX Transportation buys Conrail’s New England operations and begins expanding bulk cargo activities at Cedar Hill.

Recent decades and current use
- Early 2000s: CSX builds a bulk cargo transfer facility at the yard to move bulk goods between trains and trucks. Amtrak also uses part of the yard for storage and maintenance equipment for the Northeast Corridor.
- 2000s–2020s: The Providence and Worcester Railroad and Connecticut Southern Railroad operate freight trains to and from Cedar Hill. A line to the Port of New Haven is built to improve bulk transfers.
- 2005–2006: PCBs are detected in Amtrak’s portion of the yard; cleanup plans are developed in cooperation with state and federal agencies.
- 2016: A fire occurs on a hopper car in Cedar Hill Yard but is quickly contained.
- As of 2021–2022: CSX remains the owner and primary operator. The yard is much smaller than in its peak but still the largest classification yard in Connecticut. Much of the site is underused and attracts urban explorers; the old coaling tower remains a local landmark.
- Current operations: The yard now mainly uses flat switching, with some bulk transfer and maintenance activity. The TRANSFLO bulk transfer terminal handles cargo between trains and trucks. Local freight moves to and from Cedar Hill along with the New Haven and Springfield corridor and the CSX Berkshire Subdivision. Amtrak uses part of the yard for maintenance of way and equipment storage, and the New England Division headquarters is located there.

Strategic importance and future plans
- Cedar Hill sits at the junction of three main lines that connect New Haven to other major routes: the Shore Line Railway (now part of Amtrak’s Northeast Corridor), the Hartford and New Haven Railroad (now Amtrak’s New Haven–Springfield Line), and the Air Line (now used by the Providence and Worcester Railroad).
- In the 21st century, there have been proposals to rebuild or repurpose parts of the yard to support new freight traffic, including possible use if a Cross-Harbor Rail Tunnel is built in New York City, or to revive car float service across Long Island Sound.
- While Cedar Hill is no longer the nation’s busiest yard, it remains Connecticut’s largest classification yard and continues to play a key role in regional freight and Amtrak maintenance operations.