Stream Crossing Design & Permitting

Stream crossing and culvert replacements require a balance between safely conveying the travelling public, and allowing for aquatic organism passage.

Municipal officials whose culverts have washed out, or developers who need to cross a brook or stream, appreciate the requirement to provide a crossing of adequate size to convey today’s ever flashier stream flows. But too often existing, undersized or improperly installed culverts result in fish, wildlife, and other aquatic organisms getting “stuck” not being able to move up or downstream. At St.Germain, our engineers and scientists can provide the balance between transportation and environmental passage needs.

Our Stream Crossing Services Include:

  • Helping municipalities/landowners prepare grant applications such as Maine Department of Environmental Protection (MEDEP) Stream Crossing Public Infrastructure Improvement Projects proposal form
  • Assisting with Army Corp of Engineers, MEDEP, and US Fish and Wildlife Service permitting
  • Conducting stream channel and riparian corridor field surveys
  • Conducting stream longitudinal profile and cross section analysis
  • Conducting existing and replacement culvert flow analysis and sizing design
  • Desiging StreamSmart Road Crossing and Forest Service-recommended stream simulations
  • Completing streambank stabilization and riparian corridor assessments and consulting on restoration
  • Designing ADA-accessible canoe and kayak launches
  • Creating project-specific dewatering, spill control, and sediment control plans

Past projects include:

  • Baker Brook for Great Mountain Land Trust – Orland, Maine
  • Winkumpaugh Brook for Town of Orland – Orland, Maine
  • Little Cards Brook for The Nature Conservancy – Dedham, Maine
  • Fitts Mountain Road Brook – Dedham, Maine
  • Drew Brook for The Nature Conservancy – Greenfield Township, Maine
  • Spring Brook for Town of Dedham – Dedham, Maine