USGS Water-Year Summary 2020
12451200 LAKE CHELAN AT PURPLE POINT AT STEHEKIN, WA
LOCATION - Lat 48°18'22", long 120°39'11" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.06, T.32 N., R.18 E., Chelan County, WA, Hydrologic Unit 17020009, Lake Chelan National Recreation Area, on north shore of Lake Chelan, 0.5 mile southeast of Stehekin boat landing.
DRAINAGE AREA - 924 mi².
PERIOD OF RECORD - Unpublished data from Oct. 1 2007 to Sept. 4, 2018 available in archives of the U.S. Geological Survey.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1912. To convert to NGVD of 1929, subtract 1.73 ft.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 1,099.55ft, July 16, 2019; minimum elevation, 1,084.38 ft, March 21, 2019.