USGS Water-Year Summary 2018
14092050 LAKE BILLY CHINOOK NEAR GRANDVIEW, OR
LOCATION - Lat 44°35'05", long 121°22'15" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.26, T.11 S., R.11 E., Jefferson County, OR, Hydrologic Unit 17070301, on right bank of Metolius River arm of Lake Billy Chinook, 0.8 mi east of Fly Creek and 3.8 mi northwest of Grandview.
DRAINAGE AREA - 7,490 mi². approximately.
PERIOD OF RECORD - October 2005 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (established by Portland General Electric Co.). Prior to Oct. 1, 2009, datum of gage was reported as NGVD of 1929, but datum was found to be 0.129 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 1,945.24 ft June 5, 2010; minimum elevation, 1,936.46 ft Nov. 25, 2010.