Minnesota Department of Transportation

511 Travel Info

I-535 Blatnik Bridge

Duluth, Minn. and Superior, Wis.


The Evaluation of Feasible Alternative tech memo talks about evaluation methodology, development of alternatives, minimizing economic impacts and more.

The Blatnik Bridge fact sheet gives information on the bridge history, deterioration and maintenance.

There is a need for two bridges between Duluth and Superior. Read more information on why the two bridges - Blatnik and Bong - exist.

The Alignment Screening tech memo is a 41-page document that talks about the screening process for conceptual designs of the bridge, evaluation criteria, stages of the process and much more.

A summary of the public feedback received and how comments were considered during this round of engagement (April-May 2021) can be found here.

The purpose and need statement is part of environmental documentation, focuses on the problems and not the solutions for the project, and is used as a guide to evaluate and select alternatives. You can also view a one-page summary of the purpose and need statement. The evaluation criteria for the purpose and need statement can also be viewed. Read a summary for how comments were addressed on the purpose and need and evaluation criteria documents.