USGS Water-Year Summary 2021
05455010 South Branch Ralston Creek at Iowa City, IA
LOCATION - Lat 41°39'05", long 91°30'27" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 NE 1/4 sec.14, T.79 N., R.6 W., Johnson County, IA, Hydrologic Unit 07080209, on right bank 60 ft downstream from bridge on Muscatine Avenue in Iowa City, 1.3 mi upstream from mouth, and 3.1 mi upstream from mouth of Ralston Creek.
DRAINAGE AREA - 2.94 mi².
- WDR IA-66-1: Drainage area.
PERIOD OF RECORD - Discharge records from October 1963 to September 1995; stage-only records from October 1996 to current year.
GAGE - Water-stage recorder. Datum of gage is 678.03 ft above National Geodetic Vertical Datum of 1929. Beginning June 27, 2012, daily gage height values of <1.49 ft indicate stage was at or below the gage height of zero flow (GZF).
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 14, 1962, reached a stage of 10.5 ft, from flood profile, discharge not determined.