CARIBOU - The Maine Department of Transportation will be making improvements to the Otter Brook Bridge in Caribou. The bridge carries Route 1 (Van Buren Road) over Otter Brook. Crews will be replacing an old metal culvert with a new precast concrete box. Work will begin on June 29th and should be finished by September 7th. Drivers should expect a single-lane traffic pattern. The contractor on this project is Soderberg Construction out of Caribou. The contract price is $692,797.