USGS Water-Year Summary 2024

14312000 SOUTH UMPQUA RIVER NEAR BROCKWAY, OR

LOCATION - Lat 43°08'00", long 123°23'50" referenced to North American Datum of 1927, in SW 1/4 sec.15, T.28 S., R.6 W., Douglas County, OR, Hydrologic Unit 17100302, on right bank, 10 ft upstream from Winston Bridge on State Highway 99, 2.5 mi northeast of Brockway, 4.2 mi downstream from Lookingglass Creek and at mile 132.8.

DRAINAGE AREA - 1,670 mi².

REVISIONS HISTORY - WSP 1248: 1946(M), 1948(M), 1951. WSP 1448: Drainage area. WDR OR 72-1: 1965(M). WYS 2014: 2014.

SURFACE-WATER RECORDS

PERIOD OF RECORD - December 1905 to June 1912, October 1923 to September 1926, January 1942 to current year. Monthly discharge only for some periods, published in WSP 1318.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 462.52 ft above NGVD of 1929 (Oregon Department of Transportation bench mark). Prior to June 24, 1949, nonrecording gage at several sites within 400 ft of present site at various datums. June 24, 1949 to Oct. 1, 1970, at datum 461.84 ft above NGVD of 1929 (Oregon Department of Transportation bench mark).

REMARKS - Regulation by Ben Irving Reservoir on Berry Creek, during summer months, since January 1980. Many small diversions for irrigation upstream from station.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Feb. 21, 1927, reached a stage of about 31.2 ft, present site and datum, discharge, 89,500 ft³/s. Discharge for flood in February 1890, which reached a stage 1.9 ft higher, according to local resident who lived nearby at time of both floods, has been found to be in error and should not be used.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 125,000 ft³/s Dec. 23, 1964, gage height, 34.28 ft; minimum discharge, 16 ft³/s Aug. 23, 1977.