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USGS Water-Year Summary 2024
07180400 COTTONWOOD RIVER NEAR FLORENCE, KS
LOCATION - Lat 38°14'10", long 96°52'37" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 SW 1/4 sec.10, T.21 S., R.5 E., Marion County, KS, Hydrologic Unit 11070202, on left bank at downstream side of county highway bridge, 0.4 mi upstream from Martin Creek, 2.5 mi east of Florence, 3.3 mi downstream from Doyle Creek, and at mile 102.4.
DRAINAGE AREA - 754 mi².
REVISIONS HISTORY - Dec. 22-27, 2022: Deleted erroneous gage-height on Dec. 22 and re-estimated discharge for Dec. 22-27.
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1961 to current year.
GAGE - Water-stage recorder. Current datum of gage is 1,232.18 ft. above NAVD88. Obtained Apr. 13, 2021. Previous datum of gage was 1,231.49 ft above NGVD of 1929. Since Aug. 10, 1965, auxiliary water-stage recorder 2.8 mi downstream at datum 1,219.49 ft above NGVD of 1929. After Apr. 13, 2021 the datum for the auxiliary gage is 1,220. 32 ft. above NAVD88.
REMARKS - Flow moderately regulated since 1968 by Marion Lake (station 07179794), 24 mi upstream. Satellite telemeter at station.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known since at least 1872, 32.5 ft, July 11, 1951, from information by local residents.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 56,000 cfs on June 17, 1975 at a gage-height of 28.03 ft.
