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USGS Water-Year Summary 2024
11493500 WILLIAMSON RIVER NEAR KLAMATH AGENCY, OR
LOCATION - Lat 42°44'23.73", long 121°50'04.26" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 sec.01, T.33 S., R.7 E., Klamath County, OR, Hydrologic Unit 18010201, on right bank, 250 ft downstream from highway bridge, 0.6 mi southwest of railroad station at Kirk, 10 mi upstream from Spring Creek and 10 mi northeast of Klamath Agency.
DRAINAGE AREA - 1,290 mi². approximately.
REVISIONS HISTORY - WSP 1565: 1908-9. WDR-US-2013: 2013.
Datum of gage was revised on Apr. 17, 2021, from 4,483.16 ft above National Geodetic Vertical Datum (NGVD) of 1929 to 4,483.54 ft NGVD of 1929 (VDatum) and 4,4487.42 ft above North American Vertical Datum (NAVD) of 1988 based on a geodetic survey completed on Dec. 8, 2021.
Datum of gage was revised on Apr. 17, 2021, from 4,483.16 ft above National Geodetic Vertical Datum (NGVD) of 1929 to 4,483.54 ft NGVD of 1929 (VDatum) and 4,4487.42 ft above North American Vertical Datum (NAVD) of 1988 based on a geodetic survey completed on Dec. 8, 2021.
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1908 to January 1909, April 1909 to June 1910, October 1954 to September 1995, October 1998 to current year. Monthly discharge only June 1910, published in WSP 1315-B.
GAGE - Water-stage recorder. Datum of gage is 4,483.54 ft above NGVD of 1929 and 4,487.42 ft above NAVD of 1988. Mar. 25, 1908 to June 30, 1910, nonrecording gage or water-stage recorder at two sites about 0.5 mi upstream at different datums. Oct. 1, 1954 to Sept. 30, 1955, water-stage recorder at present site at datum 2.05 ft higher.
REMARKS - Flow affected by natural storage in Klamath Marsh. Small diversions upstream from station for irrigation in vicinity of marsh.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge observed, 1,590 ft³/s Mar. 13, 1910, gage height, 3.7 ft, site and datum then in use, from rating curve extended above 800 ft³/s; maximum gage height, 5.75 ft Mar. 3, 1958; no flow at times most years.
