DEARBORN COUNTY – A piece of concrete fell from a S.R. 46 bridge resulting in a semi accident that left one man injured and tied up traffic on I-74 Monday.58-year-old Mark Troyer, of Middlebury, Indiana, was operating a 2006 Freightliner loaded with shingles heading westbound on I-74 near the 162 mile marker around 1 p.m.Crash investigators say a piece of concrete about two cubic feet fell from the S.R. 46 bridge into the westbound lane. Troyer was unable to avoid the collision and struck it head on. After the impact the semi traveled into the median where it overturned.Construction is currently ongoing at the bridge and police say the concrete became dislodged as heavy machinery on the bridge was in use.Troyer, who was restrained, suffered a minor leg injury.Indiana State Trooper Randel Miller commented, “Thanks in large part to seat belt use, Mr. Troyer only suffered a minor injury.”The interstate was closed for a couple of hours slowing traffic both east and west.The Indiana State Police were assisted on the scene by the Dearborn County Sheriff’s Department, St. Leon Fire Department and Sunman EMS.