Work may not be finished until next spring without 24-hour shifts 10:25 pm, May 10, 2021 × The pour begins Thursday, April 29, 2021, on the concrete deck of a railroad bridge over the 21st Street underpass in another milestone for the longterm project. The bridge deck on the other rail bridge over 21st Street will be Wednesday, May 5. Work is slated to start on the final of three bridges over Main Avenue in the project area next month. Michael Vosburg / Forum Photo Editor MOORHEAD — Moorhead's engineering department received the OK on Monday night, May 10, to send a letter and have residents provide input on whether a 24-hour, six-day-a-week schedule should be allowed for the Main Avenue underpass project that is in its fourth year.