Warwick Landfill Gas Project

Warwick Landfill Gas Project is a landfill gas capture project located at the Warwick Waste Management Facility, just southeast of the town of Warwick in the Southern Downs region of Queensland. Registered in February 2025 by LGI Limited, the project covers an unspecified area within the active footprint of the Warwick landfill.

Landfill gas projects operating under the Electricity Generation from Landfill Gas Methodology Determination 2021 involve installing or upgrading infrastructure to capture biogas (primarily methane) emitted from decomposing organic waste. The standard requirements for these projects involve actively extracting the gas and combusting it, using either enclosed flares or electricity generators, to destroy the potent methane by converting it into less harmful carbon dioxide and water.

The Southern Downs region surrounding Warwick is heavily utilized for mixed agriculture, particularly broadacre cropping like wheat and sorghum, alongside cattle and sheep grazing. The regional climate is considered semi-arid to subtropical, experiencing moderate annual rainfall typically ranging between 600mm and 800mm. The soils in the eastern Darling Downs area are predominantly highly fertile cracking clays, known as Vertosols, and some texture-contrast soils.

This specific project installs a new, sophisticated landfill gas collection system featuring 12 active gas extraction wells drilled to a depth of 40 metres, connected by underground piping to a dedicated enclosed flaring unit. It is designed to capture gas generated from both legacy and non-legacy waste. Notably, the system was delivered by LGI Limited at no cost to the local ratepayers, with the company fully funding the capital and operational expenditure. Unflared methane previously accounted for approximately 65% of the Southern Downs Regional Council’s total greenhouse gas emissions. Through the creation and sale of Australian Carbon Credit Units (ACCUs), the project actively reduces these emissions while providing the local council with a long-term royalty income stream.