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During winter months, cold and ice may result in inaccurate real-time gage height and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.
NOTICE: Due to gate operations managed by NJWSA, large and sudden drops and rises in reservoir elevation can be noticed online due to draw-down at our water-level sensor. Online data may be erroneous, but will be made available until it can be reviewed. Data affected by draw-down will be removed.
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.
Total reservoir contents at spillway level, 273.0 feet NGVD of 1929, is 11,000 million gallons.
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.