PROVISIONAL DATA SUBJECT TO REVISION

Station operated in cooperation with Douglas County, OR and the U.S. Geological Survey National Streamflow Information Program (NSIP).

STATION.--14312000  SOUTH UMPQUA RIVER NEAR BROCKWAY, OR

LOCATION.--Lat 43° 08'00", long 123° 23'50", in SW 1/4 sec.15, T.28 S., R.6 W., Douglas 
   County, 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.
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 sea 
   level (State Highway Department 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 (State Highway Department bench mark).
REMARKS.--Regulation from Ben Irving Reservoir, since January 1980, on Berry Creek during
   summer months. Many small diversions for irrigation upstream from station.
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.
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 of 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.


NOTE: The most current shifted rating for this site can be found at USGS Rating Depot website.