USGS Water-Year Summary 2021
04119000 GRAND RIVER AT GRAND RAPIDS, MI
LOCATION - Lat 42°57'47", long 85°40'38" referenced to North American Datum of 1927, in NE 1/4 sec.25, T.7 N., R.12 W., Kent County, MI, Hydrologic Unit 04050006, on right bank at downstream side of bridge on Fulton Street in Grand Rapids, 1.7 mi upstream from Plaster Creek, and at mile 41.
DRAINAGE AREA - 4,900 mi².
- WSP 924: 1938(M). WSP 1387: 1901-05, 1940.
PERIOD OF RECORD - March 1901 to December 1905, January 1906 to August 1918 (gage heights only), October 1930 to current year. Monthly discharge only for some periods, published in WSP 1307. Gage-height records collected in this vicinity since 1907 are contained in reports of the National Weather Service.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 585.24 ft above NAVD 88, converted on July 9, 2020 from NGVD 29 (levels by City of Grand Rapids). March 1901 to August 1918, nonrecording gage at Fulton Street Bridge and Oct. 1, 1930 to Oct. 26, 1953, water-stage recorder at sewage pumping station 1 mi downstream at datum 2.99 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 54,000 ft³/s, Mar. 28, 1904, gage height, 19.5 ft, from graph based on gage readings, site then in use; maximum gage height, 21.85 ft, Apr. 21, 2013.