Oaks Landfill


Oaks Landfill Mediated Agreement (PDF, 11.5 MB)

The Oaks Landfill is approximately 545 acres with a  waste disposal footprint of 170 acres. This County-owned site is located at 6001 Olney-Laytonsville Road, Maryland. The landfill received mixed municipal solid waste (MSW) from June 1982 until the County’s Resource Recovery Facility (RRF) began operation in the Spring of 1995.

Once the RRF operations began, the landfill received only ash residue and non-processible materials until 1997. By the time the landfill closed in 1997, over 7 million tons of waste had been placed within the disposal footprint. The Oaks Landfill has a leachate pretreatment facility and a gas management facility that will continue to be operated throughout the 30-year post-closure maintenance period. A 2.4-megawatt (MW) landfill gas-to-energy facility started operation in mid-2009.

The landfill gas-to-energy facility (LFGE) will produces approximately 1500 kW to 1600kW of electricity per day. The power generated by the LFGE provides electricity to Montgomery County residents through a PEPCO power grid. Based on the 2018 LFGE Emissions Report, the estimated environmental benefit from the Oaks Landfill Gas-to-Energy Facility includes the reduction of approximately 132.10 tons of methane gas emissions and 23,017.10 tons of CO2 emissions.

Leachate is collected from the landfill and stored in lined lagoons. The leachate is then pumped to an on-site pre-treatment plant and treated before being transported by truck for discharge into the permitted sanitary sewerage system. Landfill gas blower/flare systems and leachate management systems are checked daily by the plant contractor. Routine site inspections are performed to check for litter, illegal dumping along the site perimeter, erosion, fence damage, and other general maintenance issues.