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°48'44", long 74°30'43"
referenced to North American Datum of 1983, Morris Township, Morris
County, NJ, Hydrologic Unit 02030103, on left downstream wingwall of
bridge on Sussex Avenue, 1.9 mi northwest of Morristown, and 2.7 mi
upstream from Lake Pocahontas Dam.
PERIOD OF RECORD.--
Occasional low-flow measurements, water years
1964-1972. Continuous-record discharge station, August 1995 to current
WDR US-2006: 1997, 1999, 2004(M), 2005(M).
WDR US-2011: 1997(M), 1999(M), 2006(M), 2007(M), 2010(M). On Jul
30, 2019, discharge for the period of Jan 4 to Jan 11, 2018, was
revised based on hydrographic comparison.
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 311.35 ft above NAVD of 1988.
Records good, except estimated discharges, which are
fair. Water diverted upstream at Clyde Potts Reservoir on Harmony Brook
for municipal supply by the Southeast Morris County Municipal Utilities
Authority. Discharges above 900 ft³/s from rating curve extension on
basis of contracted-opening and flow-over-road computations.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 2,300 ft³/s,
Aug 28, 2011, gage height, 10.42 ft, from rating curve extended above
900 ft³/s on basis of contracted-opening and flow-over-road
computations; minimum discharge, 1.7 ft³/s, Aug 7, 1999.