‍The Zimmer power plant site is a retired power generation facility located along the Ohio River near Moscow, Ohio. The plant stopped producing electricity in May 2022.

Today, the company continues to operate a landfill facility, originally opened in 1991, that is approximately three miles from the retired power plant site, where it manages materials associated with past operations and other authorized sources, including, since 2007, inert materials from the Miami Fort power plant.

No. The power plant was retired on May 31, 2022, and no longer generates electricity.

Current work at the site focuses on land management, environmental monitoring, and compliance with regulatory requirements.

The landfill site is used for the disposal of inert (non-hazardous and odorless) materials in accordance with applicable permits and regulations.

• The landfill is a permitted facility designed for the safe disposal of approved materials.

• Materials include inert (non-reactive) byproducts, such as limestone-based material made up of naturally occurring substances like silica and sediment.

‍The sedimentation pond is an engineered component of the landfill's water management system. It collects and manages stormwater and landfill leachate generated through normal landfill operations.

Yes. The landfill operates under state and local environmental permits that require management of stormwater and water generated by landfill operations. 

• Contact stormwater and leachate are collected through engineered systems, including the sedimentation pond, and managed in accordance with permit requirements. 

• The facility's water management systems are routinely monitored as part of ongoing environmental compliance.

Yes. The landfill is monitored through a network of groundwater monitoring wells that are routinely sampled and tested. Required monitoring and reporting are conducted in accordance with applicable permits and regulations. 

Yes. Certain approved materials continue to be transported to the landfill site.

• Materials from Miami Fort have been transported to the Zimmer landfill site since 2007, and this has not changed. 

These materials are odorless, inert byproducts and are handled in compliance with all applicable permits. No coal ash from other facilities, including Miami Fort, is brought to the Zimmer landfill site.

Trucks making deliveries to the Zimmer landfill site typically use a dedicated haul road. This is not a mandate or restriction; it is a practice instituted voluntarily by the company. 

There are occasions when it is safer to use state highways. In the interest of the safety of all stakeholders, trucks may access state highways as needed and to return to using the haul road once it is safe to do so.  

Note: The state highway is used by vehicles of all types, including a variety of large trucks carrying materials such as grain, as well as other industrial trucks and equipment unrelated to Zimmer. 

No. There have been no material changes to operations at the Zimmer landfill site in recent years. The site continues to operate consistently under established permits.

• Odors can result when rainwater or moisture interacts with certain landfill material, triggering natural physical, chemical, and biological processes.

• Odors may also come from leachate in the landfill that collects from time to time in a sedimentation pond.

• Weather conditions such as wind, temperature, and humidity can affect how odors travel and how strong they are.

No, the Miami Fort materials are inert and should not create odors. The intermittent odor is believed to be associated with the older landfill area containing material from when the Zimmer plant was operational.

The company continues to operate multiple systems and processes to minimize odors and monitor performance:

• Pond aeration systems

• Perimeter neutralization systems

• Carbon filtration systems

• Ongoing testing and evaluation of additional technologies

‍These systems operate continuously and are routinely monitored, with adjustments made as needed to improve odor control.

The Zimmer landfill site operates under state and local environmental permits and is subject to ongoing oversight.

• The team routinely monitors landfill conditions and odor mitigation systems.

• The company communicates regularly with federal, state, and local agencies regarding operations and public concerns.

• Air monitoring is conducted in coordination with regulatory agencies.

The Zimmer former power plant site and the landfill operations are regulated by federal, state, and local agencies, including the US EPA, Ohio EPA, and the Southwest Ohio Air Quality Agency.  

The Zimmer landfill site is an operational industrial facility, and public tours are not available.

The company continues to evaluate potential redevelopment opportunities for the Zimmer power plant site. Any future project will depend on market conditions, regulatory factors, and project feasibility.

The company encourages residents to reach out with questions or concerns.

• Community members can call the Odor Reporting Hotline at 513-467-5893 or contact the company’s community affairs team to share feedback or report issues, including odors.

‍When reporting an issue, it is helpful to include date, time, and location details to support further investigation.‍  ‍