USGS Water-Year Summary 2021
04256500 STILLWATER RESERVOIR NEAR BEAVER RIVER, NY
LOCATION - Lat 43°53'50", long 75°03'05" referenced to North American Datum of 1927, Herkimer County, NY, Hydrologic Unit 04150101, in gate house at Stillwater Dam on Beaver River, 2.5 miles upstream from Moshier Creek, and 7.5 miles west of Beaver River post office.
DRAINAGE AREA - 171 mi².
- WDR NY-85-1: Drainage area.
PERIOD OF RECORD - May 1908 to current year. Prior to February 1925, month-end contents only, published in WSP 1307. February 1925 to September 1937, published in WSP 824. Prior to October 1999, daily observations at 0800 hours.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929, adjustment of 1912. To convert elevations to NAVD of 1988, add 0.49 ft.
COOPERATION - Supplemental elevation record and capacity table provided by Board of Hudson River-Black River Regulating District.
EXTREMES FOR PERIOD OF RECORD - Maximum observed elevation, 1,680.15 ft, Apr. 29, 2011, contents, 4,969 mil ft³; minimum observed since first filling, 1,644.80 ft, Mar. 25-27, 1949, contents, 8 mil ft³.