For the FHOP (Fish Habitat Offsetting Plan) project at Glacier Creek, Arch served as the Engineer of Record. We were responsible for designing a 600-meter-long permanent sheet pile wall shoring system. This project was critical in facilitating the construction of an access road through sensitive wetlands and aimed at restoring a fish habitat. Given the environmental sensitivity of the area, our team conducted extensive geotechnical analysis and environmental reviews. This ensured the system was not only robust but also environmentally compliant.
The shoring system could withstand flooding and the associated hydrostatic pressures. Some sections of the sheet piling and waler system extended over 60 feet deep. Civil engineering efforts focused on the careful placement of berms and soil material piles. Importantly, we emphasized minimizing environmental impact. The installation methodology was also meticulously planned to further reduce disruption to the surrounding wetlands.
Strict project constraints required the sheet pile wall to follow a specific route, avoiding ponds and watercourses while still supporting the road design. Therefore, Arch Engineers provided ongoing geotechnical and environmental monitoring throughout the project. This included installing monitors, preparing daily Logs of Environmental Monitoring (LEMs), and analyzing environmental impact data to ensure full alignment with Fish Habitat Offsetting Plan objectives.