USGS Water-Year Summary 2020
07159550 LAKE HEFNER AT OKLAHOMA CITY, OK
LOCATION - Lat 35°34'58", long 97°35'43" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.23, T.13 N., R.4 W., Oklahoma County, OK, Hydrologic Unit 11050002, on south side of dam on Bluff Creek, 50 ft north of intake structure, 3.0 mi northeast of Hefner Canal at Oklahoma City (07240000) and 6.0 mi northeast of Bethany.
DRAINAGE AREA - 8.99 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. The source of water for Lake Hefner is mainly diversion of water from the North Canadian River at Lake Overholser through Bluff Creek Canal and runoff in the drainage basin.
- WDR 2012: Drainage area.
PERIOD OF RECORD - November 17, 1999 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929
EXTREMES FOR PERIOD OF RECORD - Maximum contents, unknown acre-ft, June 5,6, 2013, elevation 1,201.11 ft: minimum, 39,340 acre-ft, Jan. 27, 2013, elevation, 1,182.29 ft.