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STREAMS TRIBUTARY TO LAKE SUPERIOR
04035500 MIDDLE BRANCH ONTONAGON RIVER NEAR ROCKLAND, MI
LOCATION.--Lat 46°41'57", long 89°09'36", in SE1/4 sec.27, T.50 N.,
R.39 W., Ontonagon County, Hydrologic Unit 04020102, on left bank 10 ft
upstream from bridge on U.S. Highway 45, 700 ft downstream from East
Branch, and 2.8 mi southeast of Rockland.
DRAINAGE AREA.--671 mi2
PERIOD OF RECORD.--July 1942 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is
661.1 ft above sea level. Prior to Apr. 1, 1959, nonrecording gage at
site 400 ft upstream at same datum. Apr. 1, 1959, to Oct. 21, 1968,
nonrecording gage at present site and datum.
Station operated in cooperation with the Upper Peninsula Power Company.
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