Stone Horn Ridge LLC is an Alaska energy company formed to expand energy options through underground coal gasification (UCG). UCG is a proven technology that converts deeply buried, unmineable coal into energy-rich syngas, a domestic, secure and environmentally sound source of clean energy. UCG-produced syngas is a bridge fuel that can be used to generate electricity, upgraded into synthetic natural gas or used as feedstock for producing clean-burning liquid fuels such as gasoline, diesel and jet fuel.

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"Underground coal gasification has the potential to slash coal's environmental impacts... it could be game changing technology for addressing climate change"

- John Thompson
director of the coal transition program at the Clean Air Task Force