USGS Water-Year Summary 2024
05452200 Walnut Creek near Hartwick, IA
LOCATION - Lat 41°50'06", long 92°23'10" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 SW 1/4 sec.08, T.81 N., R.13 W., Poweshiek County, IA, Hydrologic Unit 07080208, on right bank 5 ft downstream from bridge on County Highway V21, 4.0 mi northwest of Hartwick, 1.2 mi downstream from North Walnut Creek, and 6.5 mi upstream from mouth.
DRAINAGE AREA - 70.9 mi².
REVISIONS HISTORY - WSP 1558: 1950(P), 1951-1957.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records from October 1949 to current year.
GAGE - Water-stage recorder. Datum of gage is 786.48 ft above North American Vertical Datum of 1988.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1947 reached a stage of 17.7 ft, from information by local residents, discharge not determined.