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04180988 St. Marys River at Rockford, OH LOCATION.--Lat 40°41'41", long 84°38'48", Mercer County, OH, Hydrologic Unit 04100004, on left bank downstream from the SR 118 bridge, on north side of Rockford, 0.1 mi north of intersection with SR 33. DRAINAGE AREA.--340 mi2. PERIOD OF RECORD.--October 2005 to current year.
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Value Jun 23