The 48-year-old Interstate 40 bridge between Arkansas and Tennessee was rated as being in “fair” condition with a sufficiency factor of 58% before a “significant” fracture was discovered on May 11. The structure has remained closed to traffic since that time as crews work to repair the damage, first stabilizing the bridge to accommodate the equipment needed and then removing and replacing the damaged portion of a 900-foot structural beam. The Tennessee Department of Transportation (TDOT) said a fracture may be caused by overload, shock, fatigue or stress. A critical fracture could lead to collapse, if not properly repaired and...