Newby Island Landfill Liquefaction Mitigation (1-8 Phases)

Raito has preformed 8 phases of work at Newby Island Sanitary Landfill to date. Each phase included construction of Cemex Deep Soil Mixing (CDSM) for liquefaction mitigation of approximately 24,000 cubic yards of the landfill perimeter. Improvement of the liquefiable layers required treatment depths of 38ft to 53ft below ground surface. CDSM was completed with multi-auger drilling equipment along with a length of narrow perimeter levee separating the landfill and protected wetlands. Treatment generally included three longitudinal walls installed parallel to the perimeter road with transverse walls connecting them in a grid pattern. Raito served as the General Contractor and self-performed the bulk of work for this project.

Project Highlights:

• Cement Deep Soil Mixing (CDSM) was used for ground improvement and liquefaction mitigation.

• One multi axle CDSM rig was used to depths up to 53 feet.