Mont. Code Ann. § 82-2-222

If a mineral owner seeks to condemn streets, roads, alleys, or highways pursuant to Title 70, chapter 30, for the purposes stated in 82-2-221, there must also be attached to the complaint for condemnation a plat or plats showing the alternate facilities to be proposed and paid for by the condemnor. The court, in its final order of condemnation, may order the condemnor to construct reasonable and adequate alternate facilities that it considers appropriate under the circumstances.