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Substation 7
U.S. National Register of Historic Places
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Location	1782 Third Avenue, New York, New York
Coordinates	40°47′13″N 73°56′55″W / 40.78694°N 73.94861°W / 40.78694; -73.94861
Area	less than one acre
Built	1902 (1902)
Architectural style	Beaux Arts
MPS	New York City Subway System MPS
NRHP reference No.	06000027
Added to NRHP	February 9, 2006

Substation 7 is a traction substation located at 1782 Third Avenue at 99th Street in the East Harlem neighborhood of Manhattan. The Manhattan Railway Company built it next to the Third Avenue El's 99th Street station to electrify the Second, Third and Ninth Avenue elevated lines. It served as a power source for the IRT Lexington Avenue Line from 1918 until the 1970s. It originally converted 25 Hz AC power from the 74th Street power station, to DC for the electric motors. The substation is owned by the MTA and it is listed on the National Register of Historic Places.

References

1. "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
2. Pollak, Michael (20 September 2013). "Answers to Questions About New York". The New York Times. Retrieved 1 October 2013.
3. Moffett, Mia (12 June 2012). "Construction of the 74th Street Power Station". Museum of the City of New York. Retrieved 6 March 2014.
4. "National Register of Historic Places". National Register of Historic Places. Retrieved 1 October 2013.

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