Funding for this site is provided by:
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.
PERIOD OF RECORD.--
November 1963 to current year. Prior to
October 2009, month-end contents and elevation provided by New Jersey
Water Supply Authority.
WDR NJ-84-1: (M). WDR NJ-85-1: 1984.
Water-stage recorder with telemetry. Datum of gage is
National Geodetic Vertical Datum of 1929.
Records provided by New Jersey Water Supply
Reservoir is formed by earthfill dam with concrete
spillway; dam completed in October 1963 with crest of spillway at
elevation 273.00 ft. Usable capacity, 11,000,000,000 gal. Dead storage
300,000 gal. Reservoir used for water supply and recreation. Outflow
mostly regulated by gates. Water is released to maintain minimum flow
on the South Branch Raritan River and for municipal supply. Records
given herein represent usable capacity. Annual extremes beginning in
water year 2014 can be obtained by using this link
. Prior to water
year 2014, annual extremes can be obtained on the respective annual
water year summary
EXTREMES FOR PERIOD OF RECORD.--
Maximum contents, 11,862,000,000
gal, Sep 8, 2011, elevation, 274.84 ft; minimum contents, 3,100,000,000
gal, Oct 18, 1983, elevation, 246.68 ft.
PERIOD OF RECORD.--
Water years 1964, 2010-11.
Cooperative Network Site Descriptor: Development of
Mercury-Bioaccumulation Factors special study site.
Physical measurements and samples for laboratory
analyses were provided by personnel of the NJ Department of
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.