The department has the power of eminent domain in chapter 117. The department may acquire by eminent domain or by purchase, lands or interests in lands in any project that the department considers necessary for state ownership, use, or development for the purposes of sections 84A.20 to 84A.30. No money shall be used to acquire land or interest in it until the department and the commissioner of management and budget determine that the money will not be required to meet the requisitions of the counties authorized under section 84A.23 or to pay certificates of indebtedness and their interest provided for in section 84A.23.