Lake Street bridge maintenance

County Road 3 over the Mississippi River in Minneapolis

Hennepin County and Ramsey County are making improvements to the Lake Street Bridge over the Mississippi River right now.

The bridge, built in 1989, is a significant crossing of the Mississippi River and an important landmark. Work on the bridge will assure a safe, usable, and attractive bridge for years to come.

Improvements include replacing the expansion joints, repairing the limestone veneer, repairing the plaza areas and sealing the concrete deck. It is anticipated that one half of the bridge will be worked on at a time in order to minimize traffic impacts.

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Current work

Maintenance work continues on Lake Street Bridge

Crews are replacing the bridge deck expansion joints along the northern half of the Lake Street Bridge (County Road 3) over the Mississippi River.

Small portions of the bridge deck were removed to install new bridge deck expansion joints, and new concrete was poured. With new concrete, curing time is needed to get it up to the strength needed to support traffic.

A bridge is designed to move slightly as a result of weather, weight and other factors. The expansion joints allow the bridge deck to move safely. They are also utilized to prevent corrosive materials from penetrating and damaging critical components of the bridge. The joints are one of the first components of a bridge deck that need to be replaced. Replacing them extends the life of he bridge.

In addition to replacing the expansion joints, crews are also doing masonry work to repair stone veneers on the bridge structure.

Work continuing through late October/early November

Weather permitting, expansion joint and masonry work on the northern half is expected to be complete by mid-October. Once completed, work will shift to the southern half.

One lane in each direction

Throughout this process, traffic will continue to remain at one lane in each direction. Currently, traffic is on the southern half of the bridge. Pedestrians also should use the southern half of the bridge to cross.

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