This station is operated in cooperation
Brookfield Renewable Power
Lat 44°30'42", long 74°52'59"
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 Brookfield
powerplant, and 0.8 mi upstream from Cold Brook.
PERIOD OF RECORD.--
January 1953 to September 2002, October 2010
to current year.
WDR NY-82-1: Drainage area.
Water-stage recorder and crest-stage gage. Datum of gage
is 882.05 ft above NGVD of 1929.
No estimated daily discharges. Records good except
those below 800 ft3
/s, which are poor. 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. Satellite
gage-height telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 12,800
/s, Apr. 29, 2011, gage height, 11.27 ft; minimum, 1.1
/s, Sept. 10, 2002, gage height, 1.21 ft.
Derived from NY Annual Water-Data Report 2012
Peak Flow and Stage Information