Y-50 Cable

Y-50 Cable
Location
Country	United States
State	New York
From	Dunwoodie Substation, Yonkers, New York
To	Glenwood Generating Station, Glenwood Landing, New York
Technical information
Type	Undersea; underground
Total length	17.4 mi (28.0 km)

The Y-50 Cable (also known as the Dunwoodie–Glenwood Line) is an undersea and underground high voltage electric transmission cable between Westchester County and Long Island via the Long Island Sound and Hempstead Harbor in New York, United States.

Description

The Y-50 Cable travels between the Dunwoodie Substation in Yonkers, Westchester County to the Glenwood Generating Station in Glenwood Landing, Nassau County.^[1][2] It travels under the Long Island Sound between Westchester County and Long Island. The line between Dunwoodie and the Glenwood Generating station is approximately 17.4 miles (28.0 km) – or roughly 91,000 feet (28,000 m).^[1]

Y-50 is one of five undersea transmission lines connecting between Long Island and the Continental United States as of 2021 (four of which are operated by NYPA).^[3] The line delivers power to both Long Island Power Authority and Consolidated Edison.^[4]

History

The cable began operating in 1978.^[3][4]

In 2002, the cable experienced a fault that caused a month-and-a-half interruption, after which the operators lowered its usage from its 600 MW capacity down to 400 MW for a few months.^[4][5] It experienced another fault in 2021, at which point it had a 656 MW capacity.^[6][3]

See also

• Cross Sound Cable
• Y-49 Cable

References

1. Long Island Sound-Hempstead Harbor Transmission Cable, Con Edison-Long Island Lighting County: Environmental Impact Statement. 1975.
2. "Electric Power Transmission Lines". hifld-geoplatform.opendata.arcgis.com. Retrieved 2021-08-21.
3. Harrington, Mark (2021-09-21). "1 failed power cable restored, another may be by mid-October, power authorities say". Newsday. Retrieved 2022-03-23.
4. "LIPA and Con Edison Put Y50 Cable Back In Service". Power Quality Magazine. 2002-07-01. Retrieved 2022-03-23.
5. "Long Island Power Authority and Subsidiaries: Consolidated Financial Statements, December 31, 2002 and 2001" (PDF). Long Island Power Authority. p. 8.
6. Harrington, Mark (2021-08-11). "LIPA discloses two new major power line failures". Newsday. Archived from the original on 2021-08-21. Retrieved 2021-08-21.