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USGS 01378500 Hackensack River at New Milford NJ


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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.



LOCATION.--Lat 40°56'54", long 74°01'36" referenced to North American Datum of 1983, Oradell Borough, Bergen County, NJ, Hydrologic Unit 02030103, on right bank upstream from two masonry dams and two lift gates at former pumping plant of United Water New Jersey (formerly known as Hackensack Water Co.), in New Milford, 300 feet upstream of the bridge on Elm Street, 0.6 mi downstream from Oradell Reservoir Dam, and 4.0 mi downstream from the mouth of Pascack Brook.
DRAINAGE AREA.--113 mi2.
PERIOD OF RECORD.--October 1921 to current year. Monthly discharge only for October 1921, published in WSP 1302.
REVISED RECORDS.--WSP 601: Drainage area. WSP 711: 1927-28(M). WDR NJ-1970: 1969. WDR NJ-1977: 1975(M). WDR NJ-1984: 1983. WDR NJ-1991: 1990
GAGE.--Water-stage recorder with telemetry, crest-stage gage, and concrete dam. Datum of gage is 6.25 ft above NGVD of 1929. October 1921 to November 23, 1923, non-recording gage and Nov. 23, 1923, to Sept. 25, 1934, water-stage recorder at same site at datum 0.05 ft lower.
REMARKS.--Records fair, except discharges below 1 ft3/s and estimated discharges, which are poor. Flow regulated by DeForest Lake, Lake Tappan (see 01376950), Woodcliff Lake (see 01377450), and Oradell Reservoir (see 01378480). Water diverted into basin above gage from Sparkill Creek, Saddle River, Wanaque Reservoir (see 01386990), and Pompton and Ramapo Rivers by United Water New Jersey for municipal supply. Water diverted from Oradell Reservoir at Haworth Plant, DeForest Lake, NY, and Hackensack River at West Nyack, NY for municipal supply. Diversion at gage was discontinued on May 30, 1990.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 11,600 ft3/s, Apr 16, 2007, gage height, 12.36 ft, from high-water mark in gage house; minimum discharge, 0.0 ft3/s, Oct 30, 2012, estimated.


PERIOD OF RECORD.--Water Years 1970-79, 2000-02, and July 2007.
PERIOD OF DAILY RECORD.--July, August, and September 2007.
REMARKS.--Cooperative Network Site Description: Watershed Reconnaissance and Perchlorate Assessment special study site, NJ Department of Environmental Protection Watershed Management Area 5. The accuracy of continuous water-quality data is routinely verified through inspections for fouling and calibration drift. The New Jersey Water Science Center requires that either constant or prorated adjustments be made to the continuous water-quality record when the difference between a sensor's response and a known value exceeds the following criteria: Water Temperature, 0.2 degrees Celsius (+ or -); Specific Conductance, the greater of 5 microsiemens/cm (+ or -) or 5% of the measured value; Dissolved Oxygen, the greater of 0.3 mg/L (+ or -) or 5% of the measured value; pH, 0.3 units (+or-). If the difference between a sensor's response and a known value is within specified criteria, the data are considered to be reliable and are not adjusted. Data from the following period(s) were adjusted - Dissolved Oxygen, July 31 to August 06, 2007 [correction from August 6 to 9, 2007 exceeded maximum allowable threshold], and September 05 to 09 [1300 hours], 2007 [correction from September 9 (1300 hours) to 13, 2007 exceeded the maximum allowable threshold].
COOPERATION.--Physical measurements and samples for laboratory analyses on July 25 were provided by personnel of the NJ Department of Environmental Protection. Determination of perchlorate was performed by TestAmerica Laboratories, Inc.

Peak Flood Chart

Gage Photo

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

Flow regulated by Oradell Reservoir 0.6 miles upstream of gage.

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 2 Available Parameters for this site
00060 Discharge 2007-10-01  2016-10-27
00065 Gage height 2007-10-01  2016-10-27

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Discharge, cubic feet per second

Most recent instantaneous value: 4.5   10-27-2016   14:15 EDT
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Daily discharge, cubic feet per second -- statistics for Oct 27 based on 94 years of record more
Median Most Recent
Value Oct 27
Mean Max
0.00 0.08 2.0 4.5 19 38 1180

Gage height, feet

Most recent instantaneous value: 1.49   10-27-2016   14:15 EDT
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