<p>Jimmy Roth, left, and Roy Truman of Glacier Precast Concrete install an extension on the sound wall near the U.S. 93 Alternate Route west of Kalispell on Wednesday afternoon. Traffic may be affected when installation of the large extensions continues next week. May 1, 2013 in Kalispell, Montana. (Patrick Cote/Daily Inter Lake)</p>

May 6, 2013