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USGS Water-Year Summary 2024
06856000 REPUBLICAN RIVER AT CONCORDIA, KS
LOCATION - Lat 39°35'19.21", long 97°39'29.54" referenced to North American Datum of 1983, in sec.28, T.5 S., R.3 W., Cloud County, KS, Hydrologic Unit 10250017, on right bank at downstream side of bridge on U.S. Highway 81, 1.0 mi north of Concordia, 4.9 mi downstream from Buffalo Creek, and at mile 98.5.
DRAINAGE AREA - 23,560 mi² of which 7,500 mi² probably is noncontributing.
REVISIONS HISTORY - Streamflow data was changed from October 28, 2021 to December 9, 2021 after discharge measurements 997, 998, and 999 were found to be invalid. Data from October 28, 2021 to March 18, 2022 were marked as estimated due to change.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1945 to current year. Monthly discharge only for some periods, published in WSP 1310. Gage-height records collected at nearby sites since 1951 are contained in reports of U.S. Weather Bureau.
GAGE - Water-stage recorder. Datum of gage is 1,329.39 ft. above mean sea level(NAVD88). Datum of gage was 1,328.62 ft above NGVD of 1929. Apr. 25, 1946, to Mar. 3, 1983, at site about 100 ft downstream, datum 5.0 ft higher. Apr. 11, 1983, to Sept. 30, 1987, at present site, at datum 5.0 ft higher. June 22, 1998, gage moved for bridge construction to right bank on downstream side of bridge, at same datum.
REMARKS - Natural flow affected by irrigation development upstream from station and by storage in seven reservoirs in Colorado, Nebraska, and Kansas. Considerable regulation since 1952 by Harlan County Lake (station 06849000). Flow was affected by bridge construction May 1998 to June 1999. Satellite telemeter at station.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known since at least 1895, about 23 ft, June 2, 1935, present site and datum, from information by U.S. Weather Bureau, discharge, about 207,000 ft³/s, on basis of records for stations upstream. Flood of June 21, 1915, reached a stage of 19.1 ft, present site and datum, from information by U.S. Weather Bureau, discharge, about 60,000 ft³/s.
EXTREMES FOR PERIOD OF RECORD - The flood of June 25, 1947 reached a stage of 14.90 ft. with a corresponding discharge of 75,000 cfs. A more current flood occurred July 22, 1993 which reached a stage of 19.77 ft. and corresponding discharge of 37,700 cfs.
