USGS Water-Year Summary 2021
01343403 BLACK CREEK NEAR GRAY, NY
LOCATION - Lat 43°16'58.0", long 74°57'33.1" referenced to North American Datum of 1983, Herkimer County, NY, Hydrologic Unit 02020004, on right bank 15 ft upstream from bridge on Reinhart Road, 1.3 mi upstream of State Highway 8 bridge, and 1.4 mi northwest of Gray.
DRAINAGE AREA - 60.9 mi².
PERIOD OF RECORD - August 2014 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,224.74 ft above NAVD of 1988.
EXTREMES OUTSIDE PERIOD OF RECORD - Outstanding floods occurred in August and September 2011. Flood in August or September 2011 reached a stage of about 19.9 ft, discharge not determined, from information by local resident.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, about 14,700 ft³/s, Nov. 1, 2019, gage height, 23.72 ft, from flood mark, from rating curve extended above 6,000 ft³/s; minimum discharge, 9.0 ft³/s, Sept. 12, 13, 23, 27, 28, 2020, gage height, 3.81 ft.