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Total reservoir contents at spillway level, 273.0 feet NGVD of 1929, is 11,000 million gallons. When reservoir releases are being made the reported reservoir level may be several tenths of a foot too low because of drawdown due to the close proximity of release piping and the water-level sensor.
The water temperature data for this station are temporary and will only be displayed for 120 days. Although the instrumentation is calibrated at least once/year, the temporary classification means that documented routine inspections and other quality assurance measures are not performed that would make the data acceptable for archival, retrieval, or future use in general scientific or interpretive studies.
LOCATION.—Lat 40°38'37", long 74°55'25" referenced to North American Datum of 1983, Union Township, Hunterdon County, NJ, Hydrologic Unit 02030105, at dam on Spruce Run, 0.5 mi north of Clinton, and 0.6 mi upstream from mouth.
DRAINAGE AREA.—41.3 mi2.
PERIOD OF RECORD.—November 1963 to current year. Prior to January 2009, month-end elevations and contents were provided by the New Jersey Water Supply Authority.
GAGE.—Water-stage recorder, staff gage, and RP. Datum of gage is National Geodetic Vertical Datum of 1929.
COOPERATION.—Funding for this gage is provided by the New Jersey Department of Environmental Protection, Bureau of Dam Safety and Flood Control.