Spadra Landfill Gas-to-Energy Facility


Spadra Landfill

Spadra Landfill
Gas-to-Energy Facility

Landfill gas fueled 5 MW
Low NOx burners

4125 W. Valley Boulevard
Walnut, CA 91789


One of two smaller gas-to-energy facilities constructed by the Sanitation Districts in the 1980s, this facility is located at the now-closed Spadra Landfill. The gas that is produced creates 5 MW of electricity, which is enough to power approximately 7,000 homes.


On April 8, 2000, Spadra Landfill, located in the City of Pomona, closed to the general public after serving the eastern San Gabriel Valley since 1957.


The gas-to-energy facility is a conventional Rankine Cycle Steam Power Plant using landfill gas (LFG) as fuel to generate electricity. Landfill gas is fired in the plant’s boiler producing superheated steam. The superheated steam is used to drive the steam turbine/generator to generate electric power. Currently, the Spadra Landfill facility produces approximately 5 MW net of electric power. The power is sold to the local utility company, Southern California Edison (SCE), and is used to meet onsite needs.


The Sanitation Districts were among the leaders in the landfill industry to install extensive networks of LFG collection systems on all its sanitary landfills. The majority of the collected landfill gas is utilized for electrical power generation.

Significant benefits include the effective management of methane gas collected at landfills and the generation of revenue from energy sales.

By using boilers to combust the gas and a landfill gas pretreatment system customized for each facility, the Sanitation Districts maintain emission levels well below those required by the South Coast Air Quality Management District. Overall, the Sanitation Districts’ facilities have successfully demonstrated that a landfill gas-to-energy plant can combust low-BTU landfill gas as boiler fuel, reduce air emissions, and provide significant economic benefits for landfill owners.