Funding for this site is provided by:
42°18'30", long 74°23'24" referenced to North
American Datum of 1983, Greene County, NY, Hydrologic Unit 02020005, on
right bank 200 ft southwest of State Highway 23 at Red Falls, 1.9 mi
upstream from mouth, and 2.2 mi southeast of Prattsville.
PERIOD OF RECORD.--
October 1997 to current year.
Water-stage recorder and crest-stage gage. Datum of gage
is 1,269.16 ft above NGVD of 1929.
Flow regulated to some extent at high flows by three
flood-retardation reservoirs, combined drainage area of 19.2
. Seasonal diversion for snowmaking by Ski Windam ski
area at Windham. Water Years 2014-16: Records fair except those for
estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 44,200
/s, Aug. 28, 2011, gage height, about 20.0 ft, outside
gage height was about 21.4 ft, from floodmarks, from rating curve
extended above 2,900 ft3
/s on basis of step-backwater
analyses at gage heights about 11.4 ft and about 20.0 ft; minimum
discharge, 1.7 ft3
/s, Sept. 8, 2007, Sept. 26, 2010; minimum
gage height, 0.97 ft, Aug. 9, 2012.
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of Jan. 19, 1996,
reached a stage of about 11.4 ft, from floodmark, discharge, 16,400
/s, on basis of step-backwater analysis of peak
Peak Flow and Stage Information