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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.
National Weather Service flood stage for this gage is 10.0 ft.
LOCATION.--Lat 40°30'10", long 74°35'15" referenced to North American Datum of 1983, Millstone Borough, Somerset County, NJ, Hydrologic Unit 02030105, on left bank at downstream side of bridge on County Route 514 (Amwell Road), in Millstone Borough, 2.7 mi south of Manville, and 4.4 mi upstream from mouth.
DRAINAGE AREA.--264 mi2.
PERIOD OF RECORD.--Continuous-record gaging station, water years 1903-04. Annual maximum, water years 1999 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 24.4 ft above NGVD of 1929.