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40°59'31", long 74°16'48" referenced to North
American Datum of 1983, Pompton Lakes Borough, Passaic County, NJ,
Hydrologic Unit 02030103, on left bank 50 ft upstream from bridge on
Paterson-Hamburg Turnpike in Pompton Lakes, 400 ft downstream of
Pompton Lakes Dam, and 2.0 mi upstream from mouth.
PERIOD OF RECORD.--
October 1921 to current year.
WSP 1552: 1922(M), 1924-25, 1929-31(M),
1934-35(M). WRD-NJ 1970: 1968-69. WRD-NJ 1988: 1984(M).
Water-stage recorder with telemetry and concrete weir.
Datum of gage is 171.35 ft above NGVD of 1929. Prior to Nov 1, 2004,
gage located on right bank 400 feet upstream of current location, above
dam, at datum 19.61 ft higher. Prior to Oct 1, 1981, at datum 29.61 ft
Records good, except for estimated discharges, which
are fair. Diversion at lake just upstream of gage by North Jersey
District Water Supply Commission to Wanaque Reservoir since December
1953 for municipal supply. Significant regulation due to flood gate
operations especially during periods of high flow. Flood gates
installed in 2007 in the dam on Pompton Lake, capacity, 300,000,000
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 17,800
/s, Aug 28, 2011, gage height, 22.61 ft; minimum
discharge, 0.00 ft3
/s Mar 30, 2002.
PERIOD OF RECORD1.--
Water years 1923, 1962-67, 1982, 1987 to 2011.
Dissolved Oxygen: April 1989 to current year.
Dissolved Oxygen, Percent of Saturation: June 2000 to current
pH: September 2005 to current year.
Specific Conductance: April 1989 to current year.
Water Temperature: April 1989 to current year.
Prior to Nov 1, 2004, stage was measured
on the right bank above dam, 400 ft upstream of current location.
Nutrient and inorganic chemical data from 1987-96 was collected at the
same location; data from earlier years probably was collected at the
bridge, 450 ft below dam. Temporary interruptions in the daily record
were due to instrument or pumping system malfunction. The dam is
normally top spilling but intermittent flood gate operation, which
began during calendar year 2007, releases water from the bottom.
The accuracy of continuous water-quality data can be found here
EXTREMES FOR PERIOD OF DAILY RECORD1.--
DISSOLVED OXYGEN, Percent of Saturation: Maximum, 130%, Jul 21, 2008;
minimum, 41%, Aug 22, 2014.
pH: Maximum, 10.4 standard units, Jul 31, 2008; minimum, 6.4 standard
units, Nov 30, 2007 and Jan 16, 2010.
SPECIFIC CONDUCTANCE: Maximum, 1,120 microsiemens/cm, Feb 25, 26, 2010;
minimum, 74 microsiemens/cm, Aug 29, 2011.
WATER TEMPERATURE: Maximum, 32.1°C, Jul 18, 2013; minimum, 0.0°C, on
several days during winters.
1 Water-Quality Records
National Weather Service flood stage for this
gage is 11.5 ft.
Forecasts for this gage are issued by the National Weather Service
Forecast information is available here.
Data from the gage located upstream of the Pompton Lakes Dam (01387998)
is available at this link.