USGS Water-Year Summary 2021
14308990 COW CREEK ABOVE GALESVILLE RESERVOIR, NEAR AZALEA, OR
LOCATION - Lat 42°49'24", long 123°07'29" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.01, T.32 S., R.4 W., Douglas County, OR, Hydrologic Unit 17100302, on left bank, about 600 ft upstream from bridge on Hauck Ranch Road, 1.1 mi downstream from Sugar Creek, 3.2 mi south of Galesville Dam, 6.9 mi northeast of Azalea and at mile 65.6.
DRAINAGE AREA - 64.7 mi².
- WYS 2014: 2014.
PERIOD OF RECORD - October 1985 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 1,900 ft above NGVD of 1929, from topographic map.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum flood since at least 1927, that of Jan. 15, 1974. Stage and discharge unknown at this site; however, was 10,600 ft³/s at site 7.4 mi downstream.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,980 ft³/s Jan. 9, 1995, gage height, 12.30 ft, from floodmark, from rating curve extended above 2,450 ft³/s; minimum discharge, 3.5 ft³/s Dec. 26, 1989, result of freezeup.