Aspect’s Andrew Holmson will be presenting at the American Public Works Association’s (APWA) fall conference in Spokane on Thursday, October 6. He and City of Port Angeles Engineering Manager Kathryn Neal will present Protect and Innovate: Port Angeles Landfill Stabilization – the story of how the City and a large, multidisciplinary team relocated 400,000 cubic yards of refuse away from a 140-foot bluff overlooking the Strait of Juan de Fuca while building Washington’s tallest reinforced soil slope.
Aspect has provided geotechnical engineering, hydrogeology, and environmental support to the City’s closed landfill facility since 2007. We led the engineering geology team in determining long-term and short-term shoreline and bluff retreat rates, evaluating options for removal of existing shoreline protection structures, extending or modifying the structures, evaluating bluff slope failure mechanisms and slope stabilization options, landfill cell relocation, and fill slope stabilization and design. Work on the slope was completed ealier this year. Aspect continues to support the City with operation and maintenance of the landfill gas system and have provided environmental monitoring and support to meet regulatory reporting requirements.