USGS Water-Year Summary 2017
07171000 VERDIGRIS RIVER NEAR LENAPAH, OK
LOCATION - Lat 36°51'04", long 95°35'09" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.03, T.27 N., R.16 E., Nowata County, OK, Hydrologic Unit 11070103, on right bank on downstream side of State Highway 10 bridge, 2.8 mi east of Lenapah, 5.5 mi upstream from Cedar Creek, and at mile 144.6.
DRAINAGE AREA - 3,584 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.
PERIOD OF RECORD - October 1938 to current year. Monthly discharge only for some periods, published in WSP 1311.
REVISED RECORDS - WSP 977: 1942 (M). WDR 2012: Drainage area.
GAGE - Water-stage recorder. U.S. Army Corps of Engineers' satellite telemeter at station. Datum of gage is 644.90 ft above NGVD of 1929. Some regulation since April 1949 by Fall River Reservoir in Kansas. Flow regulated since 1960 by Toronto Lake in Kansas. Flow has been further regulated since 1966 by Elk City Lake in Kansas.
EXTREMES FOR PERIOD OF RECORD - The maximum peak stage occurred during backwater from Oologah Lake.
Minimum daily discharge for period of record, no flow at times in 1939,1940, and 1956.