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Bridges & Structures

M-231 Road and Bridge Project.
Department of Transportation

Bridges & Structures

The Bureau of Bridges and Structures is responsible for statewide policy and procedure development and execution to ensure all bridges and structures are designed, constructed, maintained, and operated to ensure safety of the traveling public.

The bureau is devoted to efficient and innovative design, construction, and active preservation of Michigan's transportation structural assets.


Rebecca Curtis, Chief Bridge Engineer/Bureau Director

Jana Grover | 517-282-6167 Administrative Assistant

Structure Design

Structure Design provides statewide design support for MDOT trunkline structure projects. Structure Design delivers plans, specifications, and estimates for structures including bridges, culverts, and other ancillary structures.

Structure Construction

Provides statewide construction support to department projects with structural elements including, bridges, retaining walls, and sign and lighting support structures.

Structure Preservation & Management

The Office of Structure Preservation and Management is responsible for the administration of the overall Bridge capital outlay program, NBI Program, and Preservation Section.

Geotechnical Services

Geotechnical Services Section supports the planning, design, construction, and maintenance of geotechnical features essential for MDOT’s bridge and heavy civil infrastructure.

Bridge Information

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

Mackinac Bridge Authority
The Mackinac Bridge is a suspension bridge spanning the Straits of Mackinac, connecting Michigan's upper and lower peninsulas.

Blue Water Bridge
The Blue Water Bridge spans the St. Clair River between Port Huron, Michigan, and Point Edward and Sarnia, Ontario, and forms a critical gateway linking Canada and the United States.

International Bridge
The Sault Ste. Marie International Bridge connects Sault Ste. Marie, Ontario, with Sault Ste. Marie, Michigan, and is the only vehicular crossing between Ontario and Michigan within a 300-mile distance.