Minn. Stat. § 161.27: TRUNK HIGHWAYS ACROSS BODIES OF WATER.

Subdivision 1. Permit.

The commissioner may establish, construct, and maintain trunk highways into, through, or across any lake and may alter and change the channel of any stream when necessary or expedient in the construction or maintenance of any trunk highway; provided that no such trunk highway improvement affecting public waters shall be made until a permit therefor is issued by the commissioner of natural resources as provided by law.

Subd. 2. Acquisition of lands.

For the purposes set forth in subdivision 1 the commissioner may acquire lands and properties or any interest therein by purchase, gift, or condemnation.