months, stage and discharge may be affected by ice in the
channel. Data values reported on these pages may be
significantly higher or lower than the actual streamflow.
Adjustments to the data will be done after detailed analyses.
Ice affected values identified on graphs (•) may be viewed by choosing the table
output format. If you have questions about these values,
please contact the
Idaho Water Data Maintainer.
LOCATION.--Lat 46° 28'42", long 116° 15'27"
(NAD83), in SW1/4 SE1/4 NW1/4 sec.7, T.36 N., R.2 E., Clearwater
County, Orofino West quad., Hydrologic Unit 17060306, on right bank
56 ft upstream from State Highway 7 bridge at Orofino, and at mile
DRAINAGE AREA.--5,507 mi2, revised.
PERIOD OF RECORD.--October 1930 to September 1938, October 1964 to
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is
990.80 ft above NGVD of 1929 (levels by Idaho Department of
Highways). Prior to Sept. 30, 1938, nonrecording gage at site 0.1 mi
downstream at different datum.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 87,300
ft3/s June 2, 1972, gage height, 18.84 ft, present datum;
minimum observed discharge, probably less than 250 ft3/s
Jan. 8, 1937, during period of ice effect; minimum gage height, 1.69
ft, Dec. 9, 2009.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of June 8, 1964, reached
a stage of 20.32 ft, present site and datum, discharge, 99,700