Unstable slope means more blasting on Interstate 81 in Montgomery County Timothy Martin July 30, 2013 1 minute read An unstable slope is expected to cause delays starting tomorrow On Interstate 81 in Montgomery County. WFIR’s Timothy Martin reports. Share: Post navigation Previous: Will drop in gas prices continue?Next: New partnership benefits Explore Park Related Stories Roanoke College men’s lacrosse team receives NCAA DIII Tournament bid Clark Palmer May 4, 2026 Walk & Roll to School Day a chance for city elementary school kids to hit the road – safely Gene Marrano May 4, 2026 Hollins University receives $10 million gift to support HOPE Scholarship program Web Staff May 4, 2026