BridgesEVALUATION, DESIGN, AND CONSTRUCTION
Blaine Spring Creek Bridge
Montana Department of Transportation, MT
- 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
- 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.