USGS Water-Year Summary 2021
07152500 ARKANSAS RIVER AT RALSTON, OK
LOCATION - Lat 36°30'15", long 96°43'41" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.02, T.23 N., R.5 E., Pawnee County, OK, Hydrologic Unit 11060006, on right upstream abutment of bridge on State Highway 18 at Ralston, 2 mi downstream from Salt Creek, 2 mi upstream from Grayhorse Creek, and at mile 594.0. Prior to Feb. 10, 1988, gage was near left bank on downstream side of pier of bridge.
DRAINAGE AREA - 54,208 mi² of which 7,577 mi² probably is noncontributing. from automated delineation using 10-meter National Elevation Dataset digital elevation model data dated 10/01/2006 and Watershed Boundary Dataset dated 10/01/2006, using Albers Equal-Area Projection, North American Datum 1983.
- WDR 2012: Drainage area.
PERIOD OF RECORD - October 1925 to current year. Monthly discharge only for some periods, published in WSP 1311. Gage-height records collected in this vicinity since 1922 are contained in reports of National Weather Service.
GAGE - Water-stage recorder. Datum of gage is 777.33 above NAVD of 1988 determined by GNSS Level II Survey using Alltera network with RTK Trimble R-10 tied to RM-21 by USGS Personnel on 07-31-2019. Prior to 07-31-2019 Datum of gage was 776.70 ft above NGVD of 1929. Feb. 10, 1988 to Feb. 24, 1939, gage was near left bank on downstream side of pier of bridge at same datum. Feb. 23, 1939 to Nov. 14, 1935, nonrecording gage near left bank on downstream side of bridge at same datum. Nov. 13, 1935 to Oct. 1, 1925, nonrecording gage at site of former highway bridge 1,200 ft downstream at same datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 11, 1923, reached a stage of 23.8 ft, referred to outside gage on basis of stages observed in 1923 and 1944 at site 1,200 ft downstream.
EXTREMES FOR PERIOD PRIOR TO REGULATION - Maximum discharge for period of record 211,000 ft³/s, Oct. 13, 1973.
Maximum gage height for period of record, 22.98 ft, Oct. 13, 1973.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - Prior to regulation by Kaw Lake, water years 1926-75, 4826 ft³/s.