The selected consultant team will analyze the challenges related to debris flow hazards and habitat impacts at both the Hudson and Turkington Road bridge crossings, and will develop alternatives to inform a final design that will cost-effectively provide resilient, reliable access while minimizing long-term maintenance needs and impacts to habitat. Phase 1: Site Investigation and Alternative Analysis The consultant will perform an existing condition site assessment of the vicinity which will include: • Attend project kickoff and site visit • Review past emergency actions and completed projects • Review previous debris flow and roadway alternatives studies at the site (see “Available Reports” below) • Evaluate existing environmental data and supplement existing survey and site assessments as needed to determine permitting constraints • Perform bathymetric and topographic survey to capture Jones Creek and the project area (It is anticipated the topographic survey will be completed using a combination of drone survey, and traditional land-based survey) • Perform a geomorphic assessment to characterize existing in-stream and riparian habitat conditions, scour potential, and to provide sediment transport context and geomorphic support for the alternative analysis
