LOCATION.--Lat 43°18'57", long 73°55'39" referenced to North American Datum of 1927, Saratoga County, NY, Hydrologic Unit 02020002, 800 ft upstream from right end of Conklingville Dam on Sacandaga River at Conklingville.
DRAINAGE AREA.--1,044 mi².
PERIOD OF RECORD.--January 1930 to current year. Prior to October 1969, published as "Sacandaga Reservoir at Conklingville".
GAGE.--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, subtract 0.88 ft. To convert MSL1912 elevations to NGVD of 1929, subtract 0.44 ft. Prior to Apr. 23, 1930, nonrecording gage at same datum in outlet channel 800 ft downstream.
COOPERATION.--Supplemental elevation record and capacity table provided by Board of Hudson River-Black River Regulating District.
REMARKS.--Elevations listed herein are in ft above Mean Sea Level, 4th General Adjustment of 1912. Reservoir is formed by earth and concrete dam; storage began in March 1930; dam completed in 1930. Usable capacity for stream regulation, 29.920 bil ft³ between elevations 740.0 ft and 771.0 ft (spillway crest). Elevation of inverts of three Dow valves is 699.0 ft. Capacity of 7.800 bil ft³ below elevation 740.0 ft is considered dead storage, except for extraordinary emergencies or for necessary inspection of structures. Figures given herein represent total contents. Purpose of reservoir is to provide flood control and low-water stream regulation for sanitary improvement, navigation, and power, as required by the public welfare, including public health and safety. Area of water surface of reservoir filled to capacity, elevation 771.0 ft, is 41.7 mi².

Capacity table (elevation, in feet, and total contents, in billions of cubic feet)

Elevation  Contents      Elevation  Contents
738.0     6.43           760.0     25.61
740.0     7.80           764.0     29.85
745.0    11.64           768.0     34.27
750.0    15.94           771.0     37.72
755.0    20.61           774.0     41.26
  

EXTREMES FOR PERIOD OF RECORD.--Maximum elevation, 774.47 ft above Mean Sea Level, 4th General Adjustment of 1912 (773.59 ft above NAVD of 1988), May 1, 2011, contents, 41.824 bil ft³; minimum elevation since first filling, 729.55 ft above Mean Sea Level, 4th General Adjustment of 1912 (728.67 ft above NAVD of 1988), Mar. 30, 1940, contents, 2.100 bil ft³.

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NAVD 1988 Datum Conversion Information

Information regarding regulation of Great Sacandaga Lake: Hudson River-Black River Regulating District

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Year-to-date Elevation

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