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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.
Estimated flood stage for this gage is 9 feet.
LOCATION. --Lat 40°35'06", long 74°30'28" referenced to North American Datum of 1983, Green Brook Township, Somerset County, NJ, Hydrologic Unit 02030105, on downstream right wingwall of bridge on Sebrings Mills Road (Greenbrook Road) at Middlesex, 0.4 mi downstream of mouth of Green Brook, and 2.3 mi upstream of mouth.
DRAINAGE AREA. --48.4 mi2.
PERIOD OF RECORD. --June 1972 to September 1977, April 1996 to September 1998, February 2004 to September 2011, February 2013 to current year. Operated as a crest-stage partial-record station water years 1992 to 1995, and 1999 to 2003.
GAGE. --Water-stage recorder and crest-stage gage. Datum of gage is 26.52 ft above NGVD of 1929. Prior to October 1977, located on right bank, 107 ft upstream of bridge on Sebrings Mill Road, published as "Green Brook at Middlesex, NJ," at datum NGVD of 1929.
COOPERATION. --This gage is funded by Somerset County New Jersey and the U.S.Geological Survey's National Streamflow Information Program (NSIP). ( Link to USGS NSIP website )
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Value Sep 29