USGS Water-Year Summary 2019
07146800 WEST BRANCH WALNUT RIVER NEAR EL DORADO, KS
LOCATION - Lat 37°49'36", long 96°50'57" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 SE 1/4 sec.35, T.25 S., R.5 E., Butler County, KS, Hydrologic Unit 11030017, on right bank of downstream side of bridge on U.S. Highway 77 and at mile 1.0.
DRAINAGE AREA - 62 mi².
PERIOD OF RECORD - October 2009 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,259.49 ft above NAVD of 1988 (city of El Dorado).
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 8, 1979, reached a stage of 32.14 ft from National Weather Service. Flood stage is 21.00 ft, gage datum.