The DNR supervises Boat and Water Safety for Minnesota Lakes. A website provides access to program goals, partners, statistics, and existing regulations we well as boating etiquette, dock rules, information on boat wakes, and much more. (https://www.dnr.state.mn.us/safety/boatwater/index.html) The site offers a link to the DNR’s Annual Boating Guide containing current regulations. https://www.dnr.state.mn.us/waters/watermgmt_section/pwpermits/docks.html
The placement of markers, buoys, rafts in the lakes is also controlled by the Department of Natural Resources. For details, see https://www.revisor.mn.gov/rules/6110.1500 .
However, the issuance of permits for such activities as deploying swim rafts and ski-jumps, marking swim areas, setting mooring buoys is the responsibility of Becker County’s Sheriff. For information on obtaining permits, and guidelines see: https://www.co.becker.mn.us/dept/sheriff/PDFs/Boat%20&%20Water%20Permit.pdf.
Lake Use Restrictions on Detroit and Cormorant have been authorized by the DNR for the City Beach Zone (swimming areas and no-wake zones), Long Bridge (no wake), Pelican River outlet (no wake), and the Sandbar Channel between Big and Little Detroit (no wake).