PROVISIONAL DATA SUBJECT TO REVISION

LOCATION.--Lat 44° 05'56", long 110° 40'03" (NAD83), Teton County, Wyoming, 
   Flagg Ranch quad., Hydrologic Unit 17040101, Grand Teton National Park, on left bank 
   50 ft upstream from State Highway 89 bridge, 2 mi downstream from the south boundary 
   of Yellowstone National Park, 600 ft downstream from the confluence with Sheffield Creek.

DRAINAGE AREA.--486 mi2.

PERIOD OF RECORD.--October 1983 to current year. Prior to 1988 water year, published 
   as station 13010200.

GAGE.--Water-stage recorder. Datum of the gage is 6,801.61 ft above NGVD of 1929, 
   (levels by U.S. Coast and Geodetic Survey). A nonrecording cantilever chain gage 
   was used from 1913-18 at a site 2.5 mi upstream at a different datum. In 1918, 
   an auxiliary chain gage was installed at the current site and read periodically. 
   Water-stage recorder installed July 1921 at the current site at a different datum 
   and operated until July 1925. Records probably not comparable. 

EXTREMES FOR PERIOD OF RECORD.--Maximum daily discharge, 11,300 ft3/s June 5, 1996; 
   maximum gage height, 10.75 ft, June 5. 1996, from backwater;  
   minimum, 158 ft3/s Aug. 30, Sept. 3, 2001, gage height, 2.04 ft.

Current shift-adjusted rating in tab-separated format.
These are updated daily and can change often! If you use these ratings it is important that you update often so that you have the most current version.
What is a shift-adjusted rating?

River forecasts and additional data are available at the National Weather Service Advanced Hydrologic Prediction Services web page.

Station operated in cooperation with Idaho Water District No. 1.

Realtime Gage Height data is provided by U.S. Bureau of Reclamation telemetry.