Bridges

EVALUATION, DESIGN, AND CONSTRUCTION

Blaine Spring Creek Bridge

Montana Department of Transportation, MT

Project Features

  • 1,500 linear feet of reconstructed gravel and paved roadway sections.
  • Dust Palliative on gravel roadway sections
  • Replacement of a 130’ span bridge with an overhead steel truss supported by a new foundation system
  • Concrete drilled shaft foundations
  • Bridge rail & approach guardrail sections
  • Decorative lattice bracing on truss to match original historic bridge
  • New roadway signage
  • Project is located in an area with abundant wetland and riparian habitat. Proposed streambank restoration measures include riprap revegetation with vegetated soil lifts

Project Activities

  • Topographic site survey
  • Cultural, wetlands, and rare plant surveys
  • National Environmental Policy Act (NEPA) documents
  • Categorical Exclusion for Federal Highway Administration
  • Plans, Specifications, and Estimates (PS&E)

Additional Environmental Compliance

  • Conducted Cultural Resources Inventory & Report, as there are several archaeological sites within the project limits.
  • Staff Biologist completed wetlands delineation in compliance with COE standards.
  • Conducted Rare Plant Survey.
  • Wildlife and fisheries baselines and potential impact needs addressed.
  • Threatened and Endangered Species (T&E) and Essential Fish Habitat (EFH) inventory conducted with a “no adverse affect” determination documented.
  • Conducted asbestos and metals testing to document existing hazardous materials.
  • Completed Biological Resources Report summarizing impacts to wildlife, fisheries, and wetlands.
  • Completed permit applications including floodplain.

Project Photos