LOCATION.--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
DRAINAGE AREA.--986 mi².
PERIOD OF RECORD.--June 1916 to current year.
REVISIONS HISTORY.--WDR NY-82-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum
of gage is 288.85 ft above NGVD of 1929 and 287.68 ft above
NAVD of 1988. Prior to Sept. 16, 1916, nonrecording gage at
same site and datum.
REMARKS.--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.
Water Years 2014-20: Records good except those for estimated
daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge,
19,600 ft³/s, Apr. 6, 1960, gage height, 10.36 ft; minimum
discharge, about 90.8 ft³/s, Sept. 27, 2020, gage height, 0.33
ft, but may have been lower during period of no gage-height
record Sept. 7, 1960, Sept. 27, 28, 2020.