SOMERSET COUNTY - The Maine Department of Transportation will begin working to replace the Corson Corner Bridge on July 8th. The bridge carries Routes 43 and 151 over Black Stream, connecting the Towns of Athens and Hartland in Somerset County. During construction, drivers should expect an alternating one-way traffic pattern. S.E. MacMillan Co., Inc. of Bangor is the contractor on this project, which is expected to be finished by the beginning of October.