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Bridges and Structures

M-231 Road and Bridge Project.
Department of Transportation

Bridges and Structures

The Bureau of Bridges and Structures develops and implements statewide policies to ensure Michigan’s bridges and structures are safely designed, built, maintained, and preserved through efficient and innovative practices.

Questions? ContactRebecca Curtis, Chief Bridge Engineer/Bureau Director, or Deb Outwater at 517-599-8147.

The Blue Water Bridge with the sun rising.

Structure Design

Statewide design support, plan preparation and delivery, specifications, and estimates for bridges, culverts and other ancillary structures.

Structure Design
M-231 bridge located on the north side of the Grand River.

Structure Construction

Statewide construction support for projects with structural elements such as bridges, retaining walls, and sign or lighting support structures.

Structure Construction
The Charlevoix Lift Bridge opening.

Structure Preservation and Management

Oversees the bridge capital outlay program, National Bridge Inventory (NBI) and preservation efforts.

Structure Preservation and Management
A crane and workers placing segments of a soundwall.

Geotechnical Services

Supports planning, design, construction and maintenance of geotechnical features critical for MDOT’s bridge and heavy civil infrastructure.

Geotechnical Services
Michigan Bridge Conditions map screenshot showing locations of bridges with different reported conditions.
Michigan Bridge Conditions map screenshot showing locations of bridges with different reported conditions.

Michigan Bridge Conditions

Bridge condition ratings are an important tool for transportation asset management.

Launch the Michigan Bridge Conditions web map

Blue Water Bridge

The Blue Water Bridge spans the St. Clair River, connecting Port Huron, Michigan, and Point Edward and Sarnia, Ontario.

Gordie Howe International Bridge

The Gordie Howe International Bridge spans the Detroit River, connecting Detroit, Michigan, and Windsor, Ontario.

International Bridge

The Sault Ste. Marie International Bridge spans the St. Marys River, connecting Sault Ste. Marie, Michigan, and Sault Ste. Marie, Ontario.

Mackinac Bridge

The Mackinac Bridge spans the Straits of Mackinac, connecting Michigan's upper and lower peninsulas.