Underground Sewer Repair Begins Monday at Cretin and Marshall St. Thomas Newsroom November 21, 2012 The city of St. Paul will perform underground infrastructure repair at the intersection of Marshall and Cretin avenues beginning Monday, Nov. 26. The work is anticipated to end Wednesday, Nov. 28.Temporary traffic control, including detour routes, will be on site to maintain traffic flow and alternative routes. Advance warning signs will be set up this week.Left turns will be restricted at Cretin and Marshall avenues and detour routes will be posted. Through-traffic movement will be maintained at the intersection; however, there may be some delays during parts of the day because of limitations on traffic flow. People who regularly use this route may want to make alternative plans.If the project is delayed, a supplemental article will be published with additional details.