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Estimated flood stage for this gage is 5 feet.
LOCATION. --Lat 40°58'51", long 74°57'12" referenced to North American Datum of 1983, Blairstown Township, Warren County, NJ, Hydrologic Unit 02040105, on right bank 1,200 ft upstream from bridge on State Route 94 in Blairstown, 1,400 ft upstream from Blairs Creek, and 10 mi upstream from mouth.
DRAINAGE AREA. --126 mi2.
PERIOD OF RECORD. --October 1921 to September 1976, October 1977 to current year.
GAGE. --Water-stage recorder. Concrete control at current location since Aug 1941. Datum of gage is 335.86 ft above NGVD of 1929. Prior to May 23, 1922, a non-recording gage was located at former highway bridge 1,300 ft downstream of current location. From May 23, 1922 to Jun 24, 1931, a water-stage recorder was located 1,300 ft downstream at former highway bridge. Water-stage recorder was located 100 ft downstream of current location from Aug 8, 1931 to Jul 28, 1939 (same datum). Water-stage recorder was relocated to current site on Jul 28, 1939. A concrete control was 280 ft downstream of current location from Aug 1931 until it was destroyed on Jun. 1941. Water-stage recorder was temporarily relocated to old site (100 ft downstream of current location) from Jun 9 to Aug 4, 1941 during construction of current control. Reductions in quarry pumpage upstream appear to have reduced flows at this gage in comparison to historic streamflows.
COOPERATION. --Funding for this gage is provided by the New Jersey Department of Environmental Protection and the U.S. Geological Survey.
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Value Sep 18