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° 25'36", long 116° 48'15", in
NW1/4 NE1/4 NW1/4 sec.35, T.36 N., R.4 W., Nez Perce County, Lapwai
quad., Hydrologic Unit 17060306, on right bank 30 ft upstream from
county road bridge, 0.7 mi downstream from Tom Beall Creek, 1.6 mi
north of Lapwai, 1.6 mi south of Spalding, and at mile 1.9.
DRAINAGE AREA.--264 mi2.
PERIOD OF RECORD.--October 1974 to October 2003, December 2003 to
September 2004, December 2006 to current year.
REVISED RECORDS.--WDR-US-2010: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 864.64 ft above NGVD
REMARKS.--Diversions above station for irrigation of about 1,500
acres. Station equipment includes satellite telemetry and crest-stage
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 5,010
ft3/s Feb. 9, 1996, gage height, 9.70 ft, from rating
curve extended above 1,500 ft3/s; maximum gage height,
10.22 ft, Feb. 23, 1986; minimum, 0.71 ft3/s Dec. 21,
1990, gage height, 2.39 ft, result of freezeup.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 4,380
ft3/s January 1965, on basis of slope-area