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°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
PERIOD OF RECORD.--
October 1921 to current year. Monthly
discharge only for October 1921, published in WSP 1302.
WSP 601: Drainage area. WSP 711: 1927-28(M).
WDR NJ-1970: 1969. WDR NJ-1977: 1975(M). WDR NJ-1984: 1983. WDR
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
Records fair, except discharges below 1
/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
/s, Apr 16, 2007, gage height, 12.36 ft, from high-water
mark in gage house; minimum discharge, 0.0 ft3
/s, Oct 30,
PERIOD OF RECORD.--
Water Years 1970-79, 2000-02, and July
PERIOD OF DAILY RECORD.--
July, August, and September 2007.
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].
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.
National Weather Service flood stage for this
gage is 6 ft.
Flow regulated by Oradell Reservoir 0.6 miles
upstream of gage.