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LOCATION.--Lat 44°30'35.4", long 74°53'01.0" referenced to North American Datum of 1983, St. Lawrence County, NY, Hydrologic Unit 04150305, on left bank 300 ft upstream from bridge on State Highway 56 at South Colton, 500 ft downstream from powerplant, and 0.8 mi upstream from Cold Brook.
DRAINAGE AREA.--937 mi².
PERIOD OF RECORD.--January 1953 to September 2002, October 2010 to current year.
REVISIONS HISTORY.--WDR NY-82-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 882.05 ft above NGVD of 1929 and 881.78 ft above NAVD of 1988.
REMARKS.--Flow regulated 16 mi upstream by Carry Falls Reservoir since 1953; considerable natural storage in large lakes upstream from Piercefield. Large diurnal fluctuation caused by five powerplants upstream from gage.
Water Years 2014-19: Records good except those below 800 ft³/s and those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 12,800 ft³/s, Apr. 29, 2011, gage height, 11.27 ft; minimum, 1.1 ft³/s, Sept. 10, 2002, gage height, 1.21 ft.

Peak Flow and Stage Information

Gage PhotoStation image


This station managed by the NY Water Science Center Troy.

Available Parameters Available Period
1990-10-01  2020-04-02
2010-09-22  2020-04-02


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

Discharge, cubic feet per second

Most recent instantaneous value: 3220 04-02-2020   19:30 EST
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Apr 2 based on 59 water years of record more
Median Mean Most Recent
Value Apr 2
551 1670 2400 2650 3220 3650 6540

Gage height, feet

Most recent instantaneous value: 5.96 04-02-2020   19:30 EST
Graph of  Gage height, feet

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