Drain pipe work forces La. 431 road closure Drain pipe work forces La. 431 road closure Advocate staff report Aug. 08, 2013 Comments Poor weather conditions forced the state Department of Transportation and Development to reschedule the planned daylong closure of La. 431 for the removal and replacement of a cross drain pipe under the highway. The road closure, which was set for July 27, will start at 7 a.m. Saturday north of St. Amant High School. La. 431 is set to reopen at 3 p.m. Sunday.