USGS Water-Year Summary 2019
14139900 BULL RUN RESERVOIR NUMBER TWO NEAR BULL RUN, OR
LOCATION - Lat 45°26'52", long 122°08'52" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.26, T.1 S., R.5 E., Clackamas County, OR, Hydrologic Unit 17080001, Mount Hood National Forest, on headworks dam on Bull Run River, 4.1 mi northeast of Bull Run and at mile 6.5.
DRAINAGE AREA - 102 mi².
PERIOD OF RECORD - December 1961 to current year. Prior to October 1975, monthend contents only.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by City of Portland). Prior to Dec. 31, 1975, nonrecording gage at same site and datum.
COOPERATION - Capacity table dated Dec. 24, 1961, furnished by City of Portland.
EXTREMES FOR PERIOD OF RECORD - Maximum contents observed, 23,660 acre-ft Dec. 22, 1964, elevation, 866.00 ft; no contents at times during low-flow periods.