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°50'42", long 74°20'50"
referenced to North American Datum of 1983, Parsip-Troy Hills Twp,
Morris County, NJ, Hydrologic Unit 02030103, on left upstream wingwall
of former bridge on Edwards Road, 200 ft downstream from bridges of
Interstate 280, 0.4 mi upstream from Rockaway River, and 1.2 mi
southwest of Pine Brook.
PERIOD OF RECORD.--
Low-flow partial-record station water years
1963-69, 1973, 1979-96. November 1992 to September 1996 (gage height
and discharge measurements only). Continuous-record gaging station,
October 1996 to current year.
Water-stage, velocity (from 2005 to current), and water
temperature recorder with telemetry and crest-stage gage. Datum of gage
is 162 ft above NGVD of 1929 (from Corps of Engineers' topographic
Records fair, except for estimated discharges, which
are poor. Flow includes sewage effluent from several treatment plants
upstream of gage. Stage-discharge relationship is affected by
variable-stage backwater from the Passaic River. Water diverted
upstream at Clyde Potts Reservoir on Harmony Brook for municipal supply
by the Southeast Morris County Municipal Utilities Authority.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge 2,080
/s, estimated, Oct 20, 1996, maximum recorded gage
height, 12.54 ft, Aug 30, 2011, from high-water mark, a higher gage
height may have occurred during flood of Oct 20, 1996; minimum
discharge, not determined.
Revisions subsequent to Water Year 2014 can be
obtained by using this link
PERIOD OF RECORD.--
Water years 1963 to current year.
Discrete water-quality data were collected as part of
New Jersey Ambient Surface-Water-Quality Monitoring Network
National Weather Service flood stage for
this gage is 9 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.
This station is subject to backwater from the
Passaic River during periods of high flow. At low flows diurnal
fluctuations are noted and are probably due to patterns of sewage
effluent entering the stream at several points upstream of