Lat 43°53'54.4", long
75°03'02.4" referenced to North American Datum of
1983, 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
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.
WDR NY-85-1: Drainage area.
Water-stage recorder. Reservoir elevation record
is provided in Mean Sea Level, 4th General Adjustment of 1912
(not NGVD of 1929 as published), and NAVD of 1988 datums. To
convert MSL1912 elevations to NAVD of 1988, add 0.55 ft. To
convert MSL1912 elevations to NGVD of 1929, add 0.62 ft.
Supplemental elevation record and capacity
table provided by Board of Hudson River-Black River Regulating
Elevations listed herein are in ft above Mean
Sea Level, 4th General Adjustment of 1912. Reservoir originally
formed about 1885; enlarged at various times and in 1924
enlarged to a usable capacity of 4,623 mil ft³ between
elevations 1,650.3 ft and 1,679.3 ft (top of 24-inch
flashboards in place throughout year). Elevation of gate sill
of lowest outlet, 1,642.3 ft. Capacity below elevation 1,650.3
ft, 100 mil ft³, is included in records presented herein, but
is not ordinarily available for release. Figures given herein
represent total contents. Reservoir is used to regulate flow of
Beaver and Black Rivers for flood control, power development
and general public welfare.
Capacity table (elevation, in feet, and total contents, in millions of cubic feet)
Elevation Contents Elevation Contents
1,650.3 100 1,670.0 2,441
1,658.0 614 1,675.0 3,566
1,660.0 831 1,679.3 4,723
1,665.0 1,528 1,680.0 4,926
EXTREMES FOR PERIOD OF RECORD.--
elevation, 1,680.15 ft above Mean Sea Level, 4th General
Adjustment of 1912 (1,680.70 ft above NAVD of 1988), Apr. 29,
2011, contents, 4,969 mil ft³; minimum observed since first
filling, 1,644.80 ft above Mean Sea Level, 4th General
Adjustment of 1912 (1,645.35 ft above NAVD of 1988), Mar.
25-27, 1949, contents, 8 mil ft³.