St. Clair County is an international center for commerce and a continental crossroads due to its tremendous transportation assets and the northern border it shares with Canada. The proof can be viewed on the riverfront in Port Huron, our county seat, where the twin spans of the Blue Water International Bridge carry six lanes of traffic to and from Canada.

Three major expressways – Interstate 69, Interstate 94 and Canada’s Highway 402 – begin at the bridge, the third-busiest gateway for commercial trucks on the U.S.-Canadian border.

Thousand-foot lakers and 700-foot salties slip beneath the bridge, which rises more than 150 feet above the place where the broad St. Clair River emerges full-born from Lake Huron.

Port Huron has been described as”Midway on the Seaway” because of its location on the 370-mile St. Lawrence Seaway. It’s also known as the “Maritime Capital of the Great Lakes,” and our deep-water port facilities include the Seaway Terminal in Port Huron.

St. Clair County also is home to the nation’s No. 2 border crossing for rail traffic as measured by value and volume of goods. The 6,129-foot St. Clair Tunnel opened in 1995 to accommodate double-stack freight cars. It replaced a tunnel built in 1891.  The CN line that traverses Canada branches west of Toronto and heads south into Michigan via the rail tunnel.  The line then heads south to Chicago and beyond, eventually crossing into Mexico.

Major airports at Flint and Detroit are located within an hour’s drive, and the St. Clair County International Airport offers a mile-long main runway and 24-hour service for corporate aircraft and general aviation.