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ALL DATA ARE AT LOCAL TIME


* IMPORTANT: Next Generation Station Page

USGS 01402000 Millstone River at Blackwells Mills NJ

PROVISIONAL DATA SUBJECT TO REVISION

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SURFACE-WATER RECORDS

LOCATION.--Lat 40°28'30", long 74°34'33" referenced to North American Datum of 1983, Hillsborough Township, Somerset County, NJ, Hydrologic Unit 02030105, on left bank 30 ft downstream from highway bridge on Blackwells Mills Causeway at Blackwells Mills, 0.3 mi downstream from Six Mile Run, and 2.0 mi south of Borough of Millstone.
DRAINAGE AREA.--258 mi2.
PERIOD OF RECORD.--June 1903 to December 1904 (gage heights only), August 1921 to current year. Monthly discharge only for some periods, published in WSP 1302. Published as "at Millstone" 1903-04.
REVISED RECORDS.--WSP 1552: 1924-25(M), 1926. WDR US-2011: 1999, 2007, 2010.
GAGE.--Water-stage recorder with telemetry. Concrete control since Nov 18, 1933. Datum of gage is 26.97 ft above NGVD of 1929. June 27, 1903 to Dec 31, 1904, non-recording gage at bridge 2.0 mi downstream at Millstone at different datum. Aug 4, 1921 to Aug 16, 1928, non-recording gage at present site and datum.
REMARKS.--Records good, except for estimated discharges and discharges greater than 2,000 ft3/s, which are fair. Inflow from and losses to Delaware and Raritan Canal upstream of station. Flow slightly regulated by Carnegie Lake, capacity, 310,000,000 gal and several smaller reservoirs, combined capacity, 49,800,000 gal.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 22,200 ft3/s, Aug 28, 1971, gage height, 18.68 ft, from high-water mark, maximum gage height, 21.24 ft, Aug 28, 2011, maximum discharge occurred during different floodplain conditions; minimum discharge, 5.0 ft3/s, Sep 16, 1923.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1962-69, 1973, 1976-80, 1991 to current year.
REMARKS.--Discrete water-quality data were collected as part of the New Jersey Ambient Surface-Water-Quality Monitoring Network.

Peak Flood Chart

Gage Photo

National Weather Service flood stage for this gage is 9.0 ft.

Forecasts for this gage are issued by the National Weather Service routinely year-round.
Forecast information is available here.

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
  
2020-07-24  2020-08-08
1981-10-01  2020-08-08
2007-10-01  2020-08-08
2020-07-24  2020-08-08
2020-07-24  2020-08-08
2020-07-24  2020-08-08
2020-07-24  2020-08-08







 (7)
 

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


Temperature, water, degrees Celsius

Most recent instantaneous value: 24.3 08-08-2020   05:20 EDT
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Discharge, cubic feet per second

Most recent instantaneous value: 379 08-08-2020   05:15 EDT
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Aug 8 based on 98 water years of record more
Min
(1966)
25th
percen-
tile
Median Mean 75th
percen-
tile
Most Recent
Instantaneous
Value Aug 8
Max
(1990)
6.50 54 90 175 190 379 2340


Gage height, feet

Most recent instantaneous value: 2.39 08-08-2020   05:15 EDT
Graph of  Gage height, feet

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Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)

Most recent instantaneous value: 0.38 08-08-2020   05:20 EDT
Graph of  Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)

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Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll

Most recent instantaneous value: 1.53 08-08-2020   05:20 EDT
Graph of  Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll

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Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin

Most recent instantaneous value: 0.00 08-08-2020   05:10 EDT
Graph of  Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin

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Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)

Most recent instantaneous value: 0.04 08-08-2020   05:20 EDT
Graph of  Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)

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