Clean Energy Fuels Corp. announced on December 1, 2025 that its South Fork Dairy facility in Dimmitt, Texas, has finished construction and is now injecting pipeline‑quality renewable natural gas (RNG) into the interstate natural gas system. The plant, which processes up to 300,000 gallons of dairy manure per day through four anaerobic digesters, is the company’s largest RNG project to date and the first time the firm’s RNG is feeding the grid directly.
The $85 million project was financed entirely by Clean Energy and is expected to produce roughly 2.6 million gallons of RNG annually. The facility’s design allows it to capture methane from the dairy’s 16,000‑to‑17,500‑cow herd, convert it to RNG, and blend the product to meet pipeline specifications. The investment expands the company’s upstream supply chain and positions it to meet growing fleet demand while creating new revenue streams from environmental credits.
By injecting RNG into the pipeline, Clean Energy can generate Renewable Identification Numbers (RINs) under the Renewable Fuel Standard and is projected to earn California Low Carbon Fuel Standard (LCFS) credits beginning in the first quarter of 2026. The credits add a valuable income stream that offsets the high capital cost of the plant and supports the company’s broader strategy of scaling RNG production to support its 600‑plus fueling network.
Clean Energy’s recent financial results provide context for the milestone. In Q3 2025, the company reported revenue of $106.1 million—slightly up year‑over‑year—while posting a net loss of $23.8 million and adjusted EBITDA of $17.3 million, down from $23.6 million in Q4 2024. Management attributed the loss to ongoing investments in RNG capacity and the timing of capital expenditures, while noting that revenue growth is driven by strong demand from fleet customers and the expansion of its fueling network. Senior Vice President Clay Corbus highlighted the South Fork project as a “major step forward in building our low‑carbon RNG supply to meet growing fleet demand,” underscoring the company’s confidence in the long‑term value of the investment.
The South Fork facility’s history includes a devastating fire on April 10, 2023, which killed an estimated 18,000 dairy cows and temporarily halted construction. The incident underscored the operational risks associated with large‑scale agricultural operations but did not derail the project’s ultimate completion. The company’s ability to resume and finish the plant demonstrates resilience and a commitment to advancing its circular‑economy model of converting dairy waste into clean fuel.
The completion of the South Fork plant strengthens Clean Energy’s competitive position in the U.S. RNG market, providing a reliable supply of low‑carbon fuel for its growing fleet of fueling stations. The plant’s ability to generate RINs and LCFS credits adds a new revenue stream that can help offset the high upfront cost of RNG infrastructure. As the company continues to expand its RNG portfolio, the South Fork facility will play a key role in meeting regulatory requirements and supporting the broader transition to decarbonized transportation fuels.
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