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°36'07", long 74°27'27"
referenced to North American Datum of 1983, Green Brook Township,
Somerset County, NJ, Hydrologic Unit 02030105, on downstream left
wingwall of bridge on Rock Avenue in Plainfield, 0.3 mi north of West
Front Street, and 0.6 mi south of U.S. Route 22.
PERIOD OF RECORD.--
Annual maximum gage, water years 1972-79,
1992-2007. Continuous-record gage-height station with annual maximum
discharge, 2008 to current year. Miscellaneous measurements, water
years 1972-74, 1979, 1992, 2000-02, 2005-06.
WDR NJ-05-1: 1972(M), 1973(M), 1974(M),
1975(M), 1976(M), 1977(M), 1978(M), 1979(M).
Revisions prior to water year 2014 available
from Water Data Reports (WDR) listed above in Revised Records.
Revisions subsequent to Water Year 2014 can be obtained by using this
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 43.85 ft above NGVD of 1929.
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, 10,400 ft³/s
from rating curve extension on basis of contracted opening and
flow-over-road computation at bridge on Madison Avenue 1.1 mi
downstream, adjusted for change in drainage area, Aug 2, 1973, gage
height, 13.6 ft, from high-water mark, adjusted to current datum.