mtd-malm2025-1_DAR2025(1)_plans.pdf

These are the detailed design and construction plans for the MT DAR MALM 2025(1) Defense Access Roads project in Fergus County, Montana, prepared by the U.S. Department of Transportation Federal Highway Administration. The project involves roadway reconditioning, drainage, roadway aggregate stabilization, and related infrastructure improvements across multiple road segments (E-02, E-04, E-05, E-11, E-01, E-10, E-09, and E-08), with a total combined road length of approximately 141.98 miles.

The plans include comprehensive technical details such as typical road cross-sections, aggregate surface course specifications, calcium chloride stabilization requirements, erosion control measures, riprap stabilization details, and metal culvert specifications. The project involves various construction activities including roadway aggregate surfacing, calcium chloride treatment, drainage structure repairs, temporary traffic control, and related earthwork. The design incorporates specific requirements for road widths, aggregate depths, slope stabilization, and culvert installations, with provisions for different road conditions and terrain types in the Fergus County area of Montana.