The Michigan Department of Natural Resources says two ORV trails in Houghton and Keweenaw counties have been temporarily closed for emergency repairs. In Houghton County, the Bill Nicholls Trail is closed to through traffic between Obenhoff and Old Mill Hill roads near Atlantic Mine to repair and restore a washout on the trail. In Keweenaw County, a section of trail on South Mandan Road southeast of Copper Harbor is closed to repair a failure of the Montreal Bridge. As part of the repair project the bridge will also be upgraded to a 60-ton weight limit. Both sections are expected to reopen by this Saturday.