USGS Water-Year Summary 2022
11501000 SPRAGUE RIVER NEAR CHILOQUIN, OR
LOCATION - Lat 42°35'03.5", long 121°50'54.0" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.35, T.34 S., R.7 E., Klamath County, OR, Hydrologic Unit 18010202, on right bank, 1.0 mi northeast of Chiloquin, 4.6 mi upstream from Modoc Point Canal intake and at mile 5.4.
DRAINAGE AREA - 1,565 mi².
- WSP 591: 1922(M). WSP 1011: 1943(M). WSP 1565: 1921-22.
PERIOD OF RECORD - July to October 1920, March 1921 to current year. Monthly discharge only July 1920, published in WSP 1315-B. Prior to October 1931, published as "at McCready Ranch, near Chiloquin."
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 4,202.43 ft above NGVD of 1929. Prior to Oct. 1, 1931, nonrecording gage at site 12 mi upstream at different datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 14,900 ft³/s Dec. 26, 1964, gage height, 10.37 ft; minimum daily discharge, 50 ft³/s May 26, 1926.
PERIOD OF RECORD
WATER TEMPERATURE: April 2005 to current year.
TURBIDITY: November 2007 to August 2010, April 2012 to current year.
INSTRUMENTATION - Water-quality monitor. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
EXTREMES FOR PERIOD OF DAILY RECORD
WATER TEMPERATURE: Maximum, 29.6°C July 2, 2015; minimum, 0.0°C on many days most years.
TURBIDITY: Maximum, 95 FNU Jan. 21, 2016; minimum, <1 FNU on several to many days during most years.