The Bronx Kill is a narrow strait in New York City delineating the southernmost extent of the Bronx and separating it from Randalls Island in Manhattan. It connects the Harlem River to the East River.
Originally, the Bronx Kill was a sizeable waterway, approximately 600 feet (180 m) in width. As of 1917, there were also plans[when?] by the War Department to dredge a 24-foot (7.3 m) deep channel, 480 feet (150 m) in width, to improve navigation and reduce tidal currents. For this reason, in the early 20th century the New York Connecting Railroad built a movable bridge across the Bronx Kill on the approach to the Hell Gate Bridge. Similarly, the truss bridge of the Triborough Bridge across the Bronx Kill was designed to be convertible to a lift bridge. However, much of the Bronx Kill was later filled in to expand the parkland on Randalls Island.
The Bronx Kill offers a venue for kayakers and other human-powered boaters without the worry of larger vessel traffic. Canoe and kayak expeditions through the waterway begin on the Harlem River, near the Third Avenue Bridge. Crossings must be well timed for the tides, to ensure both the correct current direction and sufficient water height: at low water, parts of the Bronx Kill entirely bottom out, revealing muddy stretches, and assorted junk. There is also low air draft under the Randalls Island Connector. Consequently, no commercial vessels navigate the kill, with local businesses mostly opting instead for road and rail transport, including the Oak Point Link along its north bank.
In 2001, the New York Power Authority offered to construct a pedestrian bridge linking the Bronx with Randalls Island—part of the agency's remuneration to the community for building two new power plants in the South Bronx. That plan, however, fell by the wayside when local officials argued that an improved Triborough Bridge path would be sufficient. The state authority instead paid for energy efficiency measures in the borough as a whole, including a green roof on the Bronx County Courthouse.
At the time, the two sidewalks of the Triborough Bridge's Bronx Kill span were connected to one long ramp at the Randalls Island end. This provide difficult access. Following years of negotiation for land with the operators of the Harlem River Yards on the north bank of the Kill, the Randalls Island Connector bridge was constructed across the Kill. The $6 million bridge, located underneath Amtrak's Hell Gate Bridge, provides pedestrian and bicycle access between the island and the Port Morris neighborhood of the Bronx and to the South Bronx Greenway. The connector opened in November 2015.
A 2006 plan for a water park—the first in the nation for a large city—on the northwest corner of Randalls Island was controversial. Announced by the Giuliani administration as a $48 million, 15-acre (61,000 m2) project, the proposal expanded to encompass 26 acres (110,000 m2) at a projected cost of $168 million before being cancelled in 2007.
- Kadinsky, Sergey (2016). Hidden Waters of New York City: A History and Guide to 101 Forgotten Lakes, Ponds, Creeks, and Streams in the Five Boroughs. Countryman Press. pp. 85–87. ISBN 978-1-58157-566-8.
- Ammann, O.H. (August 1917). "The Hell Gate Arch Bridge and Approaches of the New York Connecting Railroad over the East River in New York City". Proceedings of the American Society of Civil Engineers. 43: 1763–1767.
- Harlem, NY-NJ Quadrangle (Map). 1:62,500. 15 Minute Series (Topographic). United States Geological Survey. 1900. § SW. Retrieved 2010-02-21.
- Rastorfer, Darl (2000). Six Bridges: The Legacy of Othmar H. Ammann. New Haven: Yale University Press. p. 166. ISBN 0-300-08047-6.
- Bindley, Katherine (September 6, 2008). "On the Water, a Tight Fit and Nervous Boaters". The New York Times. Retrieved 2009-09-18.
- Koh, Eun Lee (March 4, 2001). "Not Merely a Footbridge, but a Path to a Rare Oasis". The New York Times. Retrieved 2010-02-21.
- "Connector Between Randalls Island and Bronx Is to Open This Summer". The New York Times. July 29, 2015. Retrieved November 15, 2018.
- "Pact will let city build bridge to Randall's Island". Mott Haven Herald. Retrieved 2015-11-17.
- "South Bronx Greenway". New York City Economic Development Corporation. Retrieved 2010-10-14.
- "Long-Awaited Randall's Island Connector to Open This Weekend". DNA Info. Archived from the original on 2015-11-18. Retrieved 2015-11-17.
- Danis, Kirsten (September 22, 2007). "City Cancels Plans for Randalls Island Water Park". Daily News. New York. Retrieved 2011-02-24.