Minn. Stat. § 92.50
Subd. 1. Lease terms.
(a) The commissioner of natural resources may lease land under the commissioner's jurisdiction and control:
(c) The lease term may not exceed 21 years except:
Subd. 2. Leases for tailings deposits.
(a) The commissioner may grant leases and licenses to deposit tailings from any iron ore beneficiation plant in any public lake not exceeding 160 acres in area after holding a public hearing in the manner and under the procedure provided in Laws 1937, chapter 468, as amended and finding in pursuance of the hearing:
Subd. 3. Security requirement.
The commissioner may require a performance bond, security deposit, or other form of security for removing any improvements or personal property left on the leased premises by the lessee upon termination or cancellation of the lease.
Subd. 4. Reimbursing costs.
In addition to other payments required by this section, the applicant must reimburse the state for costs incurred for cultural resources review, monitoring, or other services provided by the Minnesota Historical Society under contract with the commissioner of natural resources or the State Historic Preservation Office of the Department of Administration in connection with reviewing the lease request, preparing the lease terms, or constructing improvements on the leased premises.