USGS Water-Year Summary 2020
15088000 SAWMILL CREEK NEAR SITKA, AK
LOCATION - Lat 57°03'05", long 135°13'40" referenced to North American Datum of 1927, in SW 1/4 sec.34, T.55 S., R.64 E., City & Borough of Sitka, AK, Hydrologic Unit 19010212, (Sitka A-4 quad.), on Baranof Island, in Tongass National Forest, on left bank 500 ft upstream from mouth, 1.6 mi downstream from Blue Lake, and 4.0 mi east of Sitka.
DRAINAGE AREA - 38.7 mi².
- WSP 1372: 1921-22 and 1928-36.
PERIOD OF RECORD - September 1920 to December 1923, February 1928 to September 1942, October 1945 to September 1957, 1994 (peak discharge only, published in WRD AK 95-1), and May 2001 to current year. Records prior to 1945 furnished by U.S. Forest Service.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is sea level, from topographic map. Prior to April 1947, staff gages or water-stage recorders at several sites within 1,700 ft of present site at various datums. April 1947 to September 1957 at site about 200 ft upstream at different datum.
EXTREMES OUTSIDE PERIOD OF RECORD - It was reported that in October 1972, a storm produced a peak elevation at Blue Lake of 353.0 ft or 11.0 ft of spill at the spillway. Extending the spillway rating, this flood was estimated to be 17,000 ft³/s. It was reported to have been the largest since 1921.
PERIOD OF RECORD - Water years 2018 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: Febuary 2018 to current year.
A Design Analysis H-522 DCP with GOES. A Water-log temperature probe for water and tipping bucket for rain gage set to log at 15 min intervals.
EXTREMES FOR PERIOD OF RECORD - Water Temperature Maximum: 13 C September 26, 2018. Minimum: 1.1 C March 2, 2018