RFP - US-89 Bridge Study - Gardiner

The Montana Department of Transportation seeks a qualified consulting firm to conduct a comprehensive alternatives analysis for the US‑89 bridge over the Yellowstone River in Gardiner. The scope includes constructability studies, Type‑Size‑Load calculations, hydraulic modeling, public involvement, traffic‑management planning, and compliance with historic preservation (Section 106) and environmental (4(f)) requirements. Deliverables must follow MDT’s Consultant Activity Descriptions and be submitted per the attached RFP instructions. • Perform a full alternatives analysis covering structural, geotechnical, hydraulic, and environmental aspects. • Provide conceptual traffic‑management plans and public outreach strategies. • Deliver reports that satisfy Section 106, 4(f), and MDT engineering standards.