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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 01408029 Manasquan River near Allenwood 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°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.
DRAINAGE AREA.--63.3 mi2.
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 year.
REVISED RECORDS.--WDR NJ-92-1: 1991 Diversions.
GAGE.--Water-stage recorder with telemetry and concrete control. Datum of gage is NGVD of 1929 (New Jersey Water Supply Authority benchmark).
REMARKS.--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 ft3/s, from rating curve extended above 3,900 ft3/s on basis of logarithmic extrapolation, Aug 28, 2011, gage height, 20.38 ft, from high-water mark; minimum discharge, 0.00 ft3/s, Jun 24, 1993, result of pumping to Manasquan Reservoir System or Glendola Reservoir.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--
July 2012.

CONTINUOUS DATA:
Specific Conductance: December 2006 to current year.
Water Temperature: December 2006 to current year.
Turbidity: December 2006 to current year.
REMARKS.--The accuracy of continuous water-quality data can be found here.
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, 2007.

Peak Flood Chart

Gage Photo

National Weather Service flood stage for this gage is 14.5 ft.

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 5 Available Parameters for this site
  
00010 Temperature, water 2007-10-01  2017-12-13
00060 Discharge 1990-06-15  2017-12-13
00065 Gage height 2007-10-01  2017-12-13
00095 Specific cond at 25C 2007-10-01  2017-12-13
63680 Turbidity, Form Neph 2007-10-01  2017-12-13

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Summary of all available data for this site
Instantaneous-data availability statement


Temperature, water, degrees Celsius

Most recent instantaneous value: 3.0 12-13-2017   19:15 EST
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Discharge, cubic feet per second

Most recent instantaneous value: 39.1 12-13-2017   19:15 EST
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Daily discharge, cubic feet per second -- statistics for Dec 13 based on 27 years of record more
Min
(2014)
25th
percen-
tile
Most Recent
Instantaneous
Value Dec 13
Median Mean 75th
percen-
tile
Max
(1993)
9.79 30 39.1 60 112 146 724


Gage height, feet

Most recent instantaneous value: 7.68 12-13-2017   19:15 EST
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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

Most recent instantaneous value: 778 12-13-2017   19:15 EST
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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

Most recent instantaneous value: 12.3 12-13-2017   19:15 EST
Graph of  Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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