USGS Water-Year Summary 2022
12115900 CHESTER MORSE LAKE AT CEDAR FALLS, WA
LOCATION - Lat 47°24'34", long 121°43'22" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.12, T.22 N., R.8 E., King County, WA, Hydrologic Unit 17110012, at the overflow dike, 3.1 mi southeast of town of Cedar Falls, and at mile 37.2.
DRAINAGE AREA - 78.4 mi².
PERIOD OF RECORD - October 1977 to current year.
GAGE - Water-stage recorder. Prior to Aug. 22, 2001, nonrecording gage at same site and datum. Datum of gage is 11.39 ft above NAVD 88 (2019 levels by USGS) and 7.39 ft above NGVD of 1929 (levels by City of Seattle).
COOPERATION - Prior to Aug. 22, 2001, gage-height record furnished by City of Seattle Water Department.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height observed, 1,568.59 ft, Nov. 25, 1990; minimum observed, 1,533.24 ft, Nov. 8, 1987.