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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2025
04216220 NIAGARA RIVER AT BLACK ROCK LOCK, BUFFALO, NY
LOCATION - Lat 42°56'01.8", long 78°54'18.0" referenced to North American Datum of 1983, Erie County, NY, Hydrologic Unit 04120104, at Black Rock Lock adjacent to U.S. Army Corps of Engineers installation at foot of Hamilton Street, Buffalo and 0.2 mi downstream from International railroad bridge.
DRAINAGE AREA - 263,700 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1984 to March 1997, November 1998 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is International Great Lakes Datum (IGLD) of 1985. Prior to Oct. 1, 1991, datum of gage was IGLD of 1955, 0.57 ft lower (previously published as 0.67 ft lower).
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 571.05 ft, Dec. 2, 1985, present datum; minimum daily elevation, 561.92 ft, Jan. 14, 1999.
