USGS Water-Year Summary 2022
07196090 ILLINOIS RIVER AT CHEWEY, OK
LOCATION - Lat 36°06'15", long 94°46'57" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.19, T.19 N., R.24 E., Adair County, OK, Hydrologic Unit 11110103, near downstream right abutment of Hampton Bridge, 0.85 mi west of Chewey, OK.
DRAINAGE AREA - 825 mi². 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 - 1996 to July 2010(Discharge measurements only). July 2010 to current year.
GAGE - Water-stage recorder. Current datum in use is 800.91 NAVD88. Current datum determined by a GNSS Level II REF FRAME: NAD_83(2011)(EPOCH:2010.0000) ITRF2014 (EPOCH:2022.6814)[NAVD88 (Computed using GEOID18)] Tied to locally set GNSS hub. Prior to 10/01/2022 datum in use was 800.88 NAVD88.
PERIOD OF RECORD - July 1996 to current year.