Funding for this site is provided by:
42°55'45.3", long 74°37'58.4" referenced to North
American Datum of 1983, Montgomery County, NY, Hydrologic Unit
02020004, on right bank at downstream side of bridge on State Highway
80 at Fort Plain, and 0.8 mi upstream from mouth.
PERIOD OF RECORD.--
October 1949 to September 1989, July 2014 to
Water-stage recorder and crest-stage gage. Datum of gage
is 321.98 ft above NGVD of 1929. Oct. 1949 to Sept. 1989, at site 0.4
mi downstream. Prior to Oct. 1, 1973, at datum 18.82 ft lower, Oct. 1,
1973 to Sept. 30, 1986, at datum 19.82 ft lower, and Oct. 1, 1986 to
Sept. 30, 1989, at datum 20.82 ft lower.
Water Years 2015-16: Records fair except those for
estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 10,400 ft³/s,
Oct. 28, 1981, gage height, 11.24 ft, site and datum then in use, in
gage well, 11.8 ft, site and datum then in use, from floodmarks, from
rating curve extended above 3,200 ft³/s on basis of contracted-opening
measurement of peak flow at present site; maximum gage height, at least
13.6 ft but less than 13.9 ft, site and datum then in use, Jan. 26,
1989 (ice jam); minimum discharge, 0.6 ft³/s, Nov. 30, 1964.
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of June 28, 2013,
reached a stage of 17.52 ft, present site and datum, from floodmarks,
19.60 ft, former site and datum, from floodmarks, discharge, 24,600
ft³/s, on basis of runoff comparison of peak flow from slope-area
measurement at site 2.3 mi upstream.
Peak Flow and Stage Information