Aquatic Contracting (AC) was contracted by the Columbia Soil and Water Conservation District to stabilize a compromised streambank adjacent to the City_s Sewer Pump Station in Scappoose. The vertical and highly incised streambank in this vicinity had scoured to within approximately 10 feet of the pump station and required stabilization measures along 140 feet of the bank prior to anticipated winter high/flood flow conditions. AC mobilized to the site, protected existing infrastructure, installed erosion control measures and isolated the in-water work area. AC then imported riprap and large wood (stick logs and root wad logs) to the site. Working carefully to minimize impacts to the existing vegetation and infrastructure, AC incorporated approximately 15 logs to create a large wood habitat structure on the outside of the meander bend. Rootwad logs, stick logs, piling logs and boulders were installed and pinned together per project plans to create a structure that would improve fish habitat while stabilizing the bank. AC then installed over 500 tons of riprap to stabilize the remaining streambank and protect the City_s Sewer Pump Station. To facilitate native tree and shrub growth along the stabilized bank, AC installed geotextile encased topsoil lifts, planted over 750 willow cuttings, and seeded and mulched all temporarily disturbed areas.
MORE RESTORATION PROJECTS