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Estimated flood stage is 4.5 feet.
LOCATION. --Lat 40°43'39", long 74°43'49" referenced to North American Datum of 1983, Washington Township, Morris County, NJ, Hydrologic Unit 02030105, on right bank 1.1 mi upstream from bridge on County Highway 512, 1.2 mi northwest of Pottersville, and 5.5 mi upstream from Cold Brook.
DRAINAGE AREA. --32.8 mi2.
PERIOD OF RECORD. --October 1921 to current year. Monthly discharge only for October and November 1921, published in WSP 1302. Prior to October 1952, published as "Black River near Pottersville".
GAGE. --Water-stage recorder. Concrete control since July 1, 1937. Datum of gage is 284.14 ft above NGVD of 1929 (levels from New Jersey Geological Survey benchmark). Prior to July 1, 1922, nonrecording gage on downstream side of highway bridge at Pottersville, 1.1 mi downstream at different datum.
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 Jul 28