This collection is a sub-subgroup under the Montana Department of Transportations records, RS 492. The Preconstruction Bureau formerly operated under the DOT Engineering Division. The Bureau is now defunct. To see the other Department of Transportation records, visit the primary finding aid, RS 492.

This collection consists primarily of project files collected in connection to proposed highway projects around Montana, including correspondence relating to the projects, reports and studies, and transcripts of the public hearings held to discuss the proposed projects, files of the Bureau Chief Steve Kologi during the late 1970s, 1980s, and 1990s. Also included are files of the Environmental Landscape Unit as well as maps associated with the Libby Dam Project / Relocation of Montana Highway 37.