The Mill Valley renewable natural gas (RNG) project in Milbank, South Dakota includes building two new anaerobic digesters on Mill Valley Farm in Allegan County. The 3,200 cows that live on this farm produce a total of 42.3 million gallons of manure each year. After the project is complete, the methane generated by this manure will be captured, cleaned, and converted into RNG, which can be used for transportation, cooking, or electricity. Mill Valley is part of the third tranche of projects developed under the Brightmark RNG Holdings LLC joint venture with Chevron U.S.A. Inc. 

“As dairy farmers, we can be part of the solution in helping the environment. The digester projects are a win-win because we have the ability to further process the manure, while reducing greenhouse gasses. Agriculture continually evolves. Our improvements in sustainability in the last generation are just short of incredible. Unfortunately, we don’t often tell our story. We are looking forward to partnering with Brightmark to bring these next generation projects to South Dakota.”
Lynn Boadwine, Owner of Boadwine Dairy, Inc. and Mill Valley Dairy 

Project Benefits


GHG Reductions: The Mill Valley project is anticipated to prevent 27,160 tons of greenhouse gas emissions each year.

Waste to New Products: The facility will generate 80,300 MMBtu of renewable natural gas per year. Other renewable products generated by the project include biofertilizer and digested dairy fiber for use as cow bedding or as a peat moss substitute. 

Project Locations


The Mill Valley Project is located in Milbank, South Dakota.

Mill Valley Farm

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