PROVISIONAL DATA SUBJECT TO REVISION

Station operated in cooperation with Portland Water Bureau.

STATION.-- 14139800  SOUTH FORK BULL RUN RIVER NEAR BULL RUN, OR

LOCATION.--Lat 45° 26'38", long 122° 06'20", in NE 1/4 NE 1/4 sec.31, T.1 S., R.6 E., Clackamas
   County, Hydrologic Unit 17080001, in Mount Hood National Forest, on right bank 6.2 mi 
   northeast of Bull Run, and at mile 0.6.[location map]
DRAINAGE AREA.--15.4 mi2. 
PERIOD OF RECORD.--October 1974 to current year. 
REVISED RECORDS.--WDR OR-91-1:  1989. 
GAGE.--Water-stage recorder and crest-stage gage.  Elevation of gage is 990 ft above NGVD of 1929, 
    from topographic map. 
REMARKS.--No regulation or diversion upstream from station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge,3,630 ft3/s Feb 7, 1996, gage height, 9.54 ft, 
   from rating curcve extended above 1,800 ft3/s on basin of slope-area measurment of peak 
   flow; minimum discharge, 5.4 ft3/s Oct 13, 1994.  

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