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°44'05", long 74°16'14"
referenced to North American Datum of 1983, Maplewood Township, Essex
County, NJ, Hydrologic Unit 02030104, on downstream right wingwall of
bridge on Jefferson Avenue in Maplewood, 1,100 ft west of Fielding
School, and 2.5 mi upstream of confluence of West Branch Rahway River
and East Branch Rahway River.
PERIOD OF RECORD.--
Continuous-record gage-height station with
annual maximum discharge, water years 1971, 1998 to current year.
Occasional low-flow measurements, water years 2000 to 2006.
WDR-US-08: 1971(M), 1998(M), 1999(M),
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 114.60 ft above NGVD of 1929.
Discharges above 700 ft³/s from rating curve extension
on basis of computation of peak flow through culvert and over road.
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 discharge, 3,470 ft³/s,
Sep 16, 1999, gage height, 10.08 ft, from rating curve extension on
basis of computation of peak flow through culvert and over road.
Rain gage data are available from this location at this link.
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.