USGS Water-Year Summary 2020
14211400 JOHNSON CREEK AT REGNER ROAD, AT GRESHAM, OR
LOCATION - Lat 45°29'12", long 122°25'14" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.15, T.1 S., R.3 E., Multnomah County, OR, Hydrologic Unit 17090012, on left bank, at Regner Road, 1.5 mi southeast of Gresham City Hall and at mile 16.3.
DRAINAGE AREA - 15.36 mi².
PERIOD OF RECORD - February 1998 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 305 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,750 ft³/s Dec. 7, 2015, gage height, 11.78 ft; minimum daily discharge, 0.13 ft³/s Sept. 6, 2003.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: January 1999 to current year.
INSTRUMENTATION - Temperature probe and data logger.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 26.6°C July 29, 2009; minimum, -0.2°C Dec. 16-18, 2005.