Transition rail rehab as-builts.pdf

This document is a technical engineering drawing from the Montana Department of Transportation (MDT) for the Bozeman Area Seismic Retrofit project, specifically detailing a modified bridge approach section (Type 3) for a rail revision on I-90 in Gallatin County. The drawing provides a detailed plan and elevation view of bridge approach modifications, with annotations indicating specific design parameters for rail and bridge infrastructure, including existing and new connectors, positioning of structural elements, and precise measurements for various sections.

The project is associated with Federal Aid Project No. M 0002(508), covering rail revision work for multiple reference points including RP 307.628, 307.843, 308.000, 309.059, 309.370, and 310.978. The technical drawing includes multiple views (partial plan and partial elevation) with precise engineering specifications for bridge approach reconstruction, suggesting a seismic retrofit and infrastructure improvement initiative. The drawing provides technical details for contractors and engineers to understand the exact specifications of the bridge approach modification, including measurements, connector placements, and structural configurations.