LAND Remediation, Inc. was contracted to execute the full-scale remediation of a former MGP site adjacent to the Mohawk River in Cohoes, NY. The project scope required the closure of a public through road and construction of a temporary access road to facilitate operations.

Over 26,000 CY of MGP impacted soil were treated via in-situ solidification (ISS) to depths of 25 feet, extending to bedrock. An engineered grout mixture was blended into native soils using large excavators to create a low-permeability monolith. Subsequent to a controlled curing period, the upper 4 feet were excavated to install a clean cover system over the ISS mass. Along the riverbank, a ISS gravity wall was constructed to support excavation activities and control river migration. A temporary cofferdam system enabled river diversion, allowing for the targeted removal of contaminated sediments within the channel.

Final site restoration included riverbank restoration, riprap-lined drainage channels, a newly constructed small wetland, vegetative cover, and permanent road and culvert infrastructure.