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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
04010500 PIGEON RIVER AT MIDDLE FALLS, NEAR GRAND PORTAGE, MN
LOCATION - Lat 48°00'44", long 89°36'58" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.24, T.64 N., R.6 E., Cook County, MN, Hydrologic Unit 04010101, on the Grand Portage Indian Reservation, on right bank 400 ft upstream from Middle Falls, 2.5 mi upstream from Grand Portage Port of Entry, 3.5 mi upstream from mouth, and 4.7 mi northeast of city of Grand Portage.
DRAINAGE AREA - 609 mi².
REVISIONS HISTORY - WSP 744:1927-28. WSP 804: 1934(M). WSP 974: Drainage area. WSP 1337:1924(M), 1925, 1926-28(M), 1930-31(M), 1938(M), 1941(M), 1945-46(M), 1947, 1948(M), 1950(M). Unpublished, 2009: 1926(M),
SURFACE-WATER RECORDS
PERIOD OF RECORD - June to October 1921, April to November 1922, March 1923 to current year. Published as "at International Bridge" April 1924 to September 1940; as "below International Bridge" October 1940 to September 1965. Monthly discharge only for some periods, published in WSP 1307.
GAGE - Water-stage recorder. Datum of gage is 787.58 ft above sea level (NGVD of 1929). Prior to Sept. 30, 1940, non-recording gage at International Bridge, 5.8 mi upstream at datum 102.24 ft higher. Oct. 1, 1940 to Dec. 31, 1975, at present site at datum 2.00 ft higher.
REMARKS - Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 12,800 ft³/s, gage-height 13.67 ft, May 13, 2022. Maximum daily mean discharge, 12,000 ft³/s, May 13, 2022; minimum discharge, 1.0 ft³/s, Jan. 15, 1977, minimum observed, occurred Jan. 15-21, 1977.
