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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
04116000 GRAND RIVER AT IONIA, MI
LOCATION - Lat 42°58'19", long 85°04'09" referenced to North American Datum of 1927, in NW 1/4 sec.30, T.7 N., R.6 W., Ionia County, MI, Hydrologic Unit 04050006, on left bank 15 ft downstream from bridge on State Highway 66 in Ionia, 2.7 mi downstream from Prairie Creek, and at mile 87.
DRAINAGE AREA - 2,840 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - March to June 1931, July 1951 to current year. Gage-height records collected in this vicinity 1907-28 (flood seasons only) are contained in reports of the National Weather Service.
GAGE - Water-stage recorder. Datum of gage is 614.63 ft above NAVD 88, converted on July 9, 2020 from NGVD 29. Mar. 19 to Sept. 24, 1931, nonrecording gage at site 1.5 mi upstream at different datum.
REMARKS - Diurnal fluctuation below approximately 5,000 ft³/s caused by powerplants upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 25,100 ft³/s, Apr. 20, 2013, gage height, 24.69 ft; minimum discharge, 40 ft³/s, May 13, 1968.
