Old Croton Dam, Site of

N of Ossining on NY 129, Ossining, New York


Street View 


Completed in 1842, and submerged in 1905 by the New Croton Dam's completion. Approximately 30 feet below the water surface, the old dam is intact at this site, with its spillway parallel to the Gate House Bridge, and about 50 feet to the southeast.

Source: http://wikimapia.org/1846137/Old-Croton-Dam

Completed in 1842, the rebuilt Old Croton Dam was the first large masonry dam constructed in the United States and became the model for municipal water system dams in the United States for many years. Its site is three miles to the north of the present Cornell Dam, or New Croton Dam. At periods of extremely low water, the outlines of the intact Old Croton Dam can be seen. Interestingly, the submerged Old Croton Dam and its gatehouse and sluiceway (at its southern end near where the original inlet to the Croton Aqueduct was located) are listed on the National Register of Historic Places as an underwater archeological site.

Source: http://notorc.blogspot.com/2009/04/old-croton-acqueduct-engineering-marvel.html

National Register information 

Posted to the National Register of Historic Places on June 19, 1973
Reference number
Areas of significance
Engineering; Architecture
Level of significance
Evaluation criteria
C - Design/Construction
Property type
Historic function
Water works
Current functions
Water works; Park; Road-related; Street furniture/object
Periods of significance
1900-1924; 1825-1849
Significant years
1842; 1901; 1906
Number of properties
Contributing structures: 1
Contributing sites: 1

Update Log 

  • March 10, 2018: New Street View added by Brian Bartlett
  • May 28, 2011: Updated by John Reidy: Corrected location from site of the New Croton Dam to it's submerged location in the New Croton Reservior.