Colorado company Carbon Cycle Energy will break ground Thursday on a $100 million biogas plant in eastern North Carolina that will produce natural-gas-quality methane.

The facility being built by Boulder-based Carbon Cycle — also known as C2e — will produce about 2.4 million dekatherms of gas a year. One therm is the energy produced by burning 100 cubic feet of natural gas; a dekatherm is 10 therms.

A million dekatherms a year are contracted to Duke Energy (NYSE: DUK) for use at its North Carolina Buck, combined-cycle natural gas plants. That is enough to produce about 125,000 megawatt-hours of electricity annually, the equivalent of the power needed to supply about 10,000 homes.

The remaining 1.4 million dekatherms will be sold to an unnamed Fortune 100 company, officials said.

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