This station is operated in cooperation
NYS Department of Environmental
Lat 44°27'05", long 73°38'33"
referenced to North American Datum of 1983, Clinton County, NY,
Hydrologic Unit 02010004, on left bank 1.8 mi downstream from
confluence of East and West Branches, and 1.8 mi east of Au Sable
PERIOD OF RECORD.--
August 1910 to September 1968, March 1990 to
current year. Prior to October 1924, published as "at Au Sable
Forks". Monthly discharge only for winter periods during 1911 and
1913 water years, published in WSP 1307.
WSP 1307: 1911-19 (M), 1922-24 (M).
Water-stage recorder and crest-stage gage. Datum of gage
is 505.65 ft above NGVD of 1929. Prior to Oct. l, 1924, nonrecording
gage at site 1.5 mi upstream at different datum.
Records good except those for estimated daily
discharges, which are poor. Occasional regulation by Fern Lake and
Taylor Pond in Black Brook basin and Upper and Lower Ausable Lakes.
Satellite and telephone gage-height telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 46,500
/s, Aug. 28, 2011, gage height, 15.54 ft, from rating
curve extended above 16,000 ft3
/s on basis of runoff
comparison of peak flows from contracted-opening measurements at gage
heights 13.83 ft and 15.54 ft at site 3.9 mi downstream; minimum
discharge, practically no flow July 21, 1912, result of unusual
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of Feb. 23, 1990 (ice
jam), reached a stage of 14.5 ft, from floodmark 200 ft upstream from
Peak Flow and Stage Information