USGS Water-Year Summary 2018
13042500 HENRYS FORK NEAR ISLAND PARK, ID
LOCATION - Lat 44°25'00", long 111°23'41" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 sec.28, T.13 N., R.43 E., Fremont County, ID, Hydrologic Unit 17040202, Island Park Dam quad, Targhee National Forest, on left bank 0.2 mi downstream from Island Park Dam, 0.2 mi upstream from Buffalo River, 1 mi southwest of Island Park Post Office, and at mile 91.5.
DRAINAGE AREA - 501 mi².
- WSP 1217: Drainage area. WDR-US-2010: Drainage area.
PERIOD OF RECORD - January 1933 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage datum - arbitrary. Prior to May 15, 1935, non-recording gage at site about 0.8 mi upstream at different datum. May 15 to Nov. 30, 1935, water-stage recorder at site 1,000 ft downstream at different datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 3,030 ft³/s May 23, 1984, gage height, 6.06 ft; minimum daily, 1.0 ft³/s Nov. 16 to Dec. 7, 1938.