A switcheroo will take place next week on the Stone Arch Bridge as a major restoration of the historical structure hits the halfway point.
The Minnesota Department of Transportation will close the side of the bridge closest to downtown Minneapolis along with the portion of Portland Avenue below it.
At the same time, the eastern half of the bridge near St. Anthony Main and Father Hennepin Park, which closed in April, will reopen, allowing pedestrians, bicyclists and those who roll by other means to get to the middle of the bridge before having to turn around.
An official detour directs anybody needing to cross the full length of the bridge spanning the Mississippi River and St. Anthony Falls to the nearby 3rd Avenue bridge.
Over the past seven months, crews have been repairing and replacing worn stone, replacing the mortar on the entire bridge, and making other repairs as needed. Stone repair and mortar replacement will slow deterioration and improve the condition of the 140-year-old bridge, said MnDOT spokesman Jesse Johnson.
Work on the $38.5 million project will continue through the winter, Johnson said, with crews removing more stone and failing mortar and sawing joints.
“This work is in preparation for work next spring when the weather is warmer, which includes veneer replacement and tuckpointing,” Johnson said.
By working through the coldest months, the project will stay on schedule, Johnson said. That means the entire bridge will reopen to pedestrians and bicyclists by fall 2025. Some work on the bridge will continue into 2026.