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**NOTICE: The New Jersey Water Science Center has transitioned to a new data management software package. While you may not have noticed this transition, some sites may have problems or delays in being updated. We are actively monitoring these conditions and are resolving them as quickly as possible. See the Dec 8 news entry for more information at: https://help.waterdata.usgs.gov/news


ALL DATA ARE AT LOCAL TIME


USGS 01381500 Whippany River at Morristown NJ

PROVISIONAL DATA SUBJECT TO REVISION

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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 analysis.

 


SURFACE-WATER RECORDS

LOCATION.--Lat 40°48'26", long 74°27'25" referenced to North American Datum of 1983, Hanover Township, Morris County, NJ, Hydrologic Unit 02030103, on left bank at Morristown sewage-treatment plant, 0.8 mi northeast of Morristown, and 9.0 mi upstream from mouth.
DRAINAGE AREA.--29.4 mi2.
PERIOD OF RECORD.--Continuous-record discharge station, August 1921 to current year.
REVISED RECORDS.--WSP 781: Drainage area. WSP 1552: 1922-23(M), 1924, 1925-27(M) 1928-29, 1930-32(M), 1933-34. WDR NJ-1974: 1965. WDR NJ-84-1: 1971(M).
GAGE.--Water-stage recorder with telemetry and crest-stage gage. Concrete control since July 1, 1936. Datum of gage is 260.01 ft above NGVD of 1929 (levels from New Jersey Geological Survey benchmark). Prior to July 16, 1930, non-recording gage at same site and datum.
REMARKS.--Records good, except for estimated discharges, which are fair. Flow occasionally regulated by operation of gates in Pocahontas Dam, 2.5 miles upstream of gage and Speedwell Lake 3.4 mi upstream of gage. Storm sewers entering the river in Morristown can cause sharp rises in stage. Diurnal fluctuations at low flow possibly due to upstream sewage-treatment plants effluent patterns. 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, 3,780 ft3/s, Aug 28, 2011, gage height, 9.58 ft, from rating curve extended above 1,400 ft3/s; minimum discharge, 2.7 ft3/s, Oct 25, 2012.

Peak Flood Chart

Gage Photo

National Weather Service flood stage for this gage is 6 ft.

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 2 Available Parameters for this site
  
00060 Discharge 1981-10-01  2017-07-26
00065 Gage height 2007-10-01  2017-07-26

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Summary of all available data for this site
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Discharge, cubic feet per second

Most recent instantaneous value: 27.1 07-26-2017   02:10 EDT
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Daily discharge, cubic feet per second -- statistics for Jul 26 based on 94 years of record more
Min
(1932)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Jul 26
Mean 75th
percen-
tile
Max
(1975)
7.30 17 24 27.1 36 41 530


Gage height, feet

Most recent instantaneous value: 2.07 07-26-2017   02:10 EDT
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