Construction June 11, 2018 trftimes Top Stories 0 Construction began Tuesday, May 29 at the intersection of Highway 1/Eighth Street and Atlantic Avenue in Thief River Falls. This section of Highway 1 will be closed through the first week of June, weather permitting. Phase 1B construction on Highway 1 from Davis Avenue North to the bridge starts after that time and continues for about one month. Phase 2 will impact Highway 1 from Highway 32 to Atlantic Avenue. Phase 2 begins after Phase 1B and will last approximately three weeks. For more information, go to www.citytrf.net.