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°26'24", long 74°37'03"
referenced to North American Datum of 1983, Montgomery Township,
Somerset County, NJ, Hydrologic Unit 02030105, on left bank, 300 ft
downstream from bridge at Griggstown, 200 ft downstream from Simonson
Brook, and 300 ft downstream from Griggstown Causeway.
PERIOD OF RECORD.--
Annual maximum, water years 1938, 1960-61,
1971, 1997, 1999 to current year. Miscellaneous measurements, water
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 26.52 ft above NGVD of 1929.
Diurnal fluctuations in gage height possibly due to
flow pattern in sewage effluent that enter the river upstream of gage.
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, 24.20 ft,
Aug 28, 2011.
National Weather Service flood stage for
this gage is 10 ft.
The water temperature data for this station
are temporary and will only be displayed for 120 days. Although the
instrumentation is calibrated at least once/year, the temporary
classification means that documented routine inspections and other
quality assurance measures are not performed that would make the data
acceptable for archival, retrieval, or future use in general scientific
or interpretive studies.