A public hearing for the proposed Ameren coal ash landfill will be held in Union Tuesday, June 25.

It will take place at East Central College in Building 12 at 6 p.m.

The hearing is being conducted by the Missouri Public Service Commission over the certificate of public convenience and necessity sought by Ameren. PSC staff will be on hand to answer questions at the hearing.

In January, Ameren Missouri filed an application with the PSC seeking a certificate of public convenience and necessity to expand the boundaries of its Labadie Energy Center by 813 acres to permit the construction and operation of a utility waste landfill.

Not all of the 813 acres will be for the actual landfill. The landfill itself is only planned to be 166 acres, and the area surrounding it would be a buffer, according to Ameren.

Ameren Missouri has asked the PSC to approve its application by Dec. 31 so landfill construction can start in 2014.

The proposed landfill, which would be adjacent to the existing power plant, has been controversial because a group of residents, called the Labadie Environmental Organization, has filed a lawsuit against Franklin County over the project.

The group contends that Franklin County illegally changed zoning regulations to accommodate the landfill.

The residents oppose the landfill because they feel it is a health risk and could hurt property values.

Ameren officials contend their landfill will be built in a safe manner with a liner and groundwater monitoring equipment.

And county officials say that the county’s zoning regulations were changed in a legal manner to allow for the landfill.

In January, the group lost its case in Franklin County Circuit but has since appealed the ruling to the Missouri Court of Appeals Eastern District in St. Louis.

Formal PSC hearings in the case are scheduled for Sept. 23-25, in Room 310 of the Governor Office Building, 200 Madison St., Jefferson City.