USGS Water-Year Summary 2023
05484800 Walnut Creek at Des Moines, IA
LOCATION - Lat 41°35'14.9", long 93°42'11.9" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 SE 1/4 sec.02, T.78 N., R.25 W., Polk County, IA, Hydrologic Unit 07100006, on left bank 25 ft downstream from bridge on 63rd Street in Des Moines, and 2.2 mi upstream from mouth.
DRAINAGE AREA - 78.4 mi².
REVISIONS HISTORY - WDR IA-73-1: 1972. WDR IA-75-1: 1973-1974.
Revisions: Gage datum was updated to 800.82 ft NAVD88 on January 1, 2023, as determined by a GNSS Level II survey. Gage datum was previously published as 801.04 ft NGVD29 from levels.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records from October 1971 to current year.
GAGE - Water-stage recorder. Datum of gage is 800.82 ft above North American Vertical Datum of 1988.