Lemhi River Salmon Habitat Restoration

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Project Highlights

· Relocated stream segments to utilize existing native vegetation to create immediate increases in shade conditions

· Created channel constrictions to allow the channel to scour pools and deepen the channel

· Utilized a diversity of treatment types to enable comparison and evaluation of best practices for future projects

Services Provided: Topo & Bathymetric Survey; Wetland & Native Vegetation Survey; Edge Treatment & Native Plant Revegetation Plans; 404 Permitting; Construction Management; Post-project Monitoring

Flow Range: 40 – 350 cfs

Design Approach: Intermountain Aquatics provided ecological design support to the RIO Applied Sciences & Engineering team for this project.  Intermountain Aquatics developed innovative edge treatment designs to ensure that robust boundary conditions were established throughout the project area and assisted with channel pattern designs to utilize existing mature, native vegetation.

River is re-located to utilize existing willows, large woody debris provides bank stability, scour, and habitat

River is re-located to utilize existing willows, large woody debris provides bank stability, scour, and habitat

Revegetation includes transplanted wetland sod and containerized willows above a fabric-encapsulated soil lift

Revegetation includes transplanted wetland sod and containerized willows above a fabric-encapsulated soil lift