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°33'24", long 74°41'15"
referenced to North American Datum of 1983, Bridgewater Township,
Somerset County, NJ, Hydrologic Unit 02030105, on upstream left
wingwall of bridge on Old York Road (County Route 567), 0.8 mi
northeast of village of South Branch, and 500 ft upstream from
confluence with South Branch Raritan River.
PERIOD OF RECORD.--
Annual maximum gage, water years 1993 to
2013. Continuous-record gage-height station, October 2013 to current
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 46.03 ft above NGVD of 1929.
Peak stages may be affected by variable-stage
backwater from the confluence with the South Branch Raritan River.
Annual peak data can be obtained by selecting Peak streamflow from the
'Available data for this site' drop-down menu above or by using
EXTREMES FOR PERIOD OF RECORD.--
Maximum gage height, 18.98 ft,
Sep 16, 1999.
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of Aug 28, 1971
reached a stage of 15.5 ft (from high-water mark).
National Weather Service flood stage for
this gage is 8 ft.