LOCATION.--Lat 48×08'18", long 100×32'22", SW14SW14SW14 sec.23, T.154 N., R.77 W., McHenry County, Hydrologic Unit 09010003, on right bank 400 ft south of county highway bridge, 9 mi upstream from mouth, and 5 mi northeast of Karlsruhe.
DRAINAGE AREA.--705 mi2, of which about 420 mi2 is probably noncontributing. (Drainage area shown is for former location 5 river miles downstream. Total drainage area has been reduced about 10 percent, which mostly consists of noncontributing area. New drainage areas will be published, but have not been delineated.)
PERIOD OF RECORD.--March 1937 to current year. Monthly discharge only for some periods, published in WSP 1308.
GAGE.--Water-stage recorder. Elevation of gage is 1,500 ft above National Geodetic Vertical Datum of 1929, from topographic map. Mar. 1937 to Sept. 30, 1994, at site 5 miles downstream, at datum 20 ft lower.
REMARKS.--Records fair except for estimated daily discharges, which are poor. Some regulation by Fish and Wildlife Service dams on Cottonwood and Wintering Lakes, controlled capacity, about 850 acre-ft.
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