Arapahoe County Line Landfill - Littleton, Colorado Solid Waste Management Facility

Arapahoe County Line Landfill is an operational landfill located at 4200 E County Line Rd in Littleton, Colorado, within Douglas County. As a landfill facility, it plays a key role in the solid waste management infrastructure of the Denver metropolitan area, handling municipal solid waste generated by surrounding communities. The facility operates under the regulatory framework of the US EPA RCRA Subtitle D, which governs municipal solid waste landfills, including standards for liner systems, leachate management, and groundwater monitoring. Additionally, landfill gas management is subject to Clean Air Act regulations. The landfill's NAICS code 562212 indicates it is classified as a solid waste landfill, focusing on disposal of non-hazardous waste. Environmental considerations for this landfill include methane gas generation from decomposing waste, which is typically captured for energy recovery or flaring to reduce greenhouse gas emissions. Leachate collection and treatment are critical to protect local groundwater resources. The landfill's proximity to Littleton and residential areas necessitates careful traffic management and odor control to minimize community impact.

The landfill is situated in a semi-arid climate in Colorado, where water resources are precious. Leachate management is crucial to prevent contamination of groundwater, which is a primary drinking water source for the region. Methane emissions from the landfill contribute to greenhouse gas levels, but modern gas collection systems can mitigate this. The facility's location near residential areas in Littleton requires ongoing community engagement to address concerns about traffic, odors, and property values.