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America's Largest Landfills

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Roosevelt Regional Landfill

Location: Washington
Tons Per Day: 8,300
Remaining Life: 51.5 years
Operator: Republic Services
Landfill Gas: Leachate and methane gas are collected throughout the landfill by a system of pipes. The leachate — liquid formed during the decomposition process — is re-circulated through the landfill prompting rapid decomposition of waste and accelerating methane production. Current methane production supports the generation of 10 megawatts of electrical power. The landfill may eventually generate 52 megawatts of electricity; enough power for roughly 30,000 homes.

Source: Wunderlich Securities, Waste Management

Photo: Courtesy Image