Ada County Landfill - Boise, Idaho Municipal Solid Waste Landfill

Ada County Landfill is a municipal solid waste landfill located at 10300 Seamans Gulch Road in Boise, Idaho. Operated by Ada County, the facility has been in operation since 1972 and is projected to remain open until 2100. It serves as the primary waste disposal site for Ada County, handling residential and commercial solid waste. The landfill operates under the regulatory framework of the US EPA RCRA Subtitle D, which governs municipal solid waste landfills, and the Clean Air Act's landfill gas rules. As a Subtitle D facility, it must comply with requirements for liner systems, leachate collection, groundwater monitoring, and landfill gas management. The facility's long operational history and planned lifespan indicate a significant role in regional waste management. Environmental considerations for Ada County Landfill include landfill gas generation and methane leakage, leachate management, and proximity to the Boise metropolitan area. The facility's location in a semi-arid climate influences leachate production and gas collection efficiency. Proper management of these factors is essential to minimize environmental impact and ensure compliance with federal and state regulations.

The Ada County Landfill is situated in the Treasure Valley region of Idaho, near the Boise River and the city of Boise. The area's semi-arid climate results in lower precipitation, which can reduce leachate generation but also limits natural methane oxidation in cover soils. Landfill gas collection systems are critical to control methane emissions and comply with Clean Air Act requirements. Groundwater monitoring is essential due to the proximity to the Boise River aquifer, which serves as a drinking water source for the region. Community proximity and truck traffic are also key environmental considerations for this facility.