USGS Water-Year Summary 2020
12147900 SOUTH FORK TOLT RESERVOIR NEAR CARNATION, WA
LOCATION - Lat 47°41'38", long 121°41'16" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.32, T.26 N., R.9 E., King County, WA, Hydrologic Unit 17110010, on top and near the center of the dam, 11.4 mi northeast of Carnation, and at mile 8.4.
DRAINAGE AREA - 18.8 mi².
- WA-98-1: 1997.
PERIOD OF RECORD - October 1991 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (Seattle Public Utilites benchmark).
COOPERATION - Capacity table furnished by Seattle Public Utilites.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 59,511 acre-ft, May 20, 21, 2008, elevation, 1,766.54 ft; minimum contents observed, 16,280 acre-ft, Oct. 12, 2003, elevation, 1,711.77 ft.