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
Funding for this site is provided by:
Lat 40°37'19", long 74°26'10"
referenced to North American Datum of 1983, North Plainfield Boro,
Somerset County, NJ, Hydrologic Unit 02030105, on upstream right
wingwall of bridge on Green Brook Road, in North Plainfield, 100 ft
downstream of Crab Brook, and 1.4 mi upstream of mouth.
PERIOD OF RECORD.--
Annual maximum, water years 1975-83, 1991 to
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 71.69 ft above NGVD of 1929.
Peak gage heights prior to 1991 were recorded at the
downstream side of the bridge. Annual peak data can be obtained by
selecting Peak streamflow from the 'Available data for this
site' drop-down menu above or by using this
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 3,140
/s, Aug 28, 2011, gage height, 8.36 ft, from rating
extended above 400 ft3
/s from rating curve extension based
on logarithmic extrapolation; gage height of 8.36 ft also occurred on
Sep 16, 1999, discharge, not determined.
EXTREMES OUTSIDE PERIOD OF RECORD.--
The flood of Aug 2, 1973
reached a gage height of 10.65 ft, discharge, not determined.
National Weather Service flood stage for
this gage is 7 ft.