This station is operated in cooperation
Brookfield Renewable Power
U.S. Geological Survey
Lat 44°35'58", long 75°22'44"
referenced to North American Datum of 1983, St. Lawrence County, NY,
Hydrologic Unit 04150302, on right bank 1.5 mi downstream from Beaver
Creek, and 2.5 mi upstream from Heuvelton.
PERIOD OF RECORD.--
June 1916 to current year.
WDR NY-82-1: Drainage area.
Water-stage recorder and crest-stage gage. Datum of gage
is 288.85 ft above NGVD of 1929. Prior to Sept. 16, 1916, nonrecording
gage at same site and datum.
Records good except those for estimated daily
discharges, which are poor. Entire flow regulated by Cranberry Lake
(station 04260990); slight diurnal fluctuation at low flow and medium
flow caused by powerplants. During high stages on Grass River, part of
flow of that stream may pass through Upper Lake, Indian Creek, and
Lower Lake and enter Oswegatchie River at Rensselaer Falls, 4.5 mi
upstream from station. In October 1973, a dike was installed on Indian
Creek to prevent overflow of Grass River during high flows. Satellite
gage-height telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 19,600
/s, Apr. 6, 1960, gage height, 10.36 ft; minimum
discharge, 99 ft3
/s, Aug. 4, 1991, gage height, 0.49 ft;
minimum gage height, 0.42 ft, Sept. 11, 2002, but may have been lower
during period of no gage-height record Sept. 7, 1960.
Peak Flow and Stage Information