The department shall: (1) maintain and preserve the records of the commission in its office at Helena; and (2) file and preserve copies of all plans, specifications, contracts, estimates, and official acts taken by it or by the commission.
Mont. Code Ann. § 60-2-202, under Department of Transportation General Powers and Duties.
Mont. Code Ann. § 60-2-202
The department shall: (1) maintain and preserve the records of the commission in its office at Helena; and (2) file and preserve copies of all plans, specifications, contracts, estimates, and official acts taken by it or by the commission.