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 45° 24'47", long 116° 19'31"
(NAD83), in SE1/4 SW1/4 sec.15, T.24 N., R.1 E., Idaho County,
Hydrologic Unit 17060210, Riggins quad., on right bank 14 ft upstream
from road bridge, at mile 0.5, and 0.8 mi southwest of Riggins.
DRAINAGE AREA.--576 mi2. Mean elevation, 5,430 ft.
PERIOD OF RECORD.--February 1951 to February 1955, September 1956
to current year.
GAGE.--Water-stage recorder. Elevation of gage is 1,760 ft above
NGVD of 1929, from topographic map. Prior to Sept. 28, 1984, at site
250 ft upstream at different datum.
REMARKS.--Diversions above station for irrigation of about 15,300
acres, (1966 determination).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 12,600
ft3/s June 17, 1974, gage height, 11.05 ft, from
floodmark; maximum gage height, 12.39 ft, June 13, 1953, site and
datum then in use; minimum discharge, 54 ft3/s Dec. 21,
1990, gage height, 2.71 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood about June 1, 1948,
reached a discharge of 9,200 ft3/s, by slope-area