Funding for this site is provided by:
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.
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 and 881.78 ft above NAVD of 1988.
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 2014-17: 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