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°08'48", long 74°07'20"
referenced to North American Datum of 1983, Wall Township, Monmouth
County, NJ, Hydrologic Unit 02040301, on left bank just downstream from
pumping station of Manasquan Water Supply System, 1400 ft upstream from
Hospital Road, 1.1 mi west of Allenwood, 1.2 mi downstream from Mill
Run, 2.2 mi east of Squankum, and 7.9 mi upstream of mouth.
PERIOD OF RECORD.--
Annual maximum gage, 1969-1996, published as
Manasquan River at Allenwood, NJ (station 01408030) at site 1,400 ft
downstream. Continuous-record discharge station, June 1990 to current
WDR NJ-92-1: 1991 Diversions.
Water-stage recorder with telemetry and concrete control.
Datum of gage is NGVD of 1929 (New Jersey Water Supply Authority
Records good, except for estimated discharges, which
are fair. Diversion by New Jersey-American Water Company from Manasquan
Reservoir since 1990 and by Manasquan Water Supply System just upstream
of gage to Manasquan Reservoir for municipal supply since March 1990.
Discharges above 3,900 ft3
/s from rating curve extension on
basis of logarithmic extrapolation.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 12,600
/s, from rating curve extended above 3,900
/s on basis of logarithmic extrapolation, Aug 28, 2011,
gage height, 20.38 ft, from high-water mark; minimum discharge, 0.00
/s, Jun 24, 1993, result of pumping to Manasquan
Reservoir System or Glendola Reservoir.
PERIOD OF RECORD.--
Specific Conductance: December 2006 to current year.
Water Temperature: December 2006 to current year.
Turbidity: December 2006 to current year.
The accuracy of continuous water-quality data can be
EXTREMES FOR PERIOD OF DAILY RECORD.--
WATER TEMPERATURE: Maximum, 25.4°C, Aug 14, 2016; minimum, 0.0°C, on
several days during winters.
TURBIDITY: Maximum, 550 FNU, Apr 30, 2013; minimum, 2.7 FNU, Sep 6,
National Weather Service flood stage for
this gage is 14.5 ft.