USGS Water-Year Summary 2023
04040260 GRATIOT RIVER AT 5 MILE POINT ROAD NEAR AHMEEK, MI
LOCATION - Lat 47°19'22", long 88°24'19" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.20, T.57 N., R.32 W., Keweenaw County, MI, Hydrologic Unit 04020103, on left downstream side of bridge on 5 Mile Point Road, 3 miles northwest of Ahmeek.
DRAINAGE AREA - 14.9 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 2014 to September 2018 (discontinued).
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 820 ft above NGVD 29.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 644 ft³/s, May 1, 2018, gage-height, 13.68 ft, from rating curve extended above 299 ft³/s.