Demolition of parts of the Union Depot in downtown St. Paul — the next step in rebuilding the historic train station into a “multi-modal transportation hub ” — will begin Tuesday.

The demolition behind the main depot building will make room for train tracks and bus lanes.

Aan official groundbreaking of the project is scheduled for Tuesday at 2 p.m., at Kellogg Boulevard and Broadway Street, and lots of officials are expected:

• Gov. Mark Dayton (invited)
• Sens. Amy Klobuchar and Al Franken (invited)
• Congresswoman Betty McCollum (confirmed)
• Rep. Alice Hausman (confirmed)
• Mayor Chris Coleman (confirmed)
• Jim McDonough, Ramsey County Regional Railroad Authority chair (confirmed)
• Matt Kramer, president/CEO, St. Paul Area Chamber of Commerce (confirmed)
• Shar Knutson, president, Minnesota AFL-CIO (confirmed)

Thousands of construction jobs will be filled during the two-year construction process. A $35 million federal grant is helping to pay for this part of the $243 million project.