Portion of newly constructed permanent cap slides off face of Ontario County Landfill - 13WHAM-TV

Portion of newly constructed permanent cap slides off face of Ontario County Landfill | WHAM

Seneca, N.Y. — An estimated 3 1/2 acres of permanent cap slid off the face of the Ontario County Landfill earlier this week, the county announced Friday.

The New York State Department of Environmental Conservation and Casella Waste Management are investigating the incident, which happened late Tuesday afternoon.

The county said roughly half of the newly constructed seven-acre cap slid down the southwest face. No one was injured.

The material remains within the waste area of the landfill and hasn't impacted surrounding areas, according to the county.

Casella, which operates the landfill, placed the capping material on the section of the landfill over the summer.

Investigators are working to determine what caused the material to slide off.

The county said a "large volume" of soil damaged some landfill gas collection in the area, causing potential for increased gas odor in the area.

No waste material appears to have been exposed, compromised or migrated outside the landfill, according to county.

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