The Yellowjacket Renewable Natural Gas (RNG) project in upstate New York will convert 265,000 gallons per day of dairy waste from 12,886 dairy cows at five area farms into 305,000 MMBtu of RNG each year. Previously, the anaerobic digesters on these farms produced electricity that was used both onsite by the farms and transmitted to the local electric grid. However, some of the digesters are more than 10 years old, and they had begun to cost more to maintain and operate than they generated in value. After refurbishment work is complete, participating farmers expect to see drastically greater returns on their digesters.

Anaerobic digesters are under construction at four sites in upstate New York for our Yellowjacket project. During construction, we preserve the valuable topsoil from the site for use elsewhere on the farm.

“We’re excited for the digester upgrades to be complete so that we can see improved returns on our investments. Brightmark has been a fantastic partner throughout this process and we’re hopeful about the long-term results from this project.”

– Matt Lamb, Participating farmer and owner of Lake Shore Dairy

Project Benefits

GHG Reductions
The facility will offset 108,000 metric tons of greenhouse gas emissions each year, which has an equivalent carbon impact as planting 127,108 acres of forest.

Waste to New Products
Renewable products generated by the project include biofertilizer, digested dairy fiber for use as cow bedding or as a peat moss substitute, and reclaimed irrigation water.

Resource Recovery
The process of recovering and processing manure from the farms will prevent excess nitrogen and phosphorus from escaping into local air and water.

Project Locations

  • Boxler Dairy Farm – Varysburg, Wyoming County
  • Lamb Lakeshore Dairy – Wilson, Niagara County
  • Lamb Farms – Oakfield, Genesee County
  • Swiss Valley Farms – Warsaw, Wyoming County
  • Zuber Farms – Byron, Genesee County


The Swiss Valley, Zuber, Boxler, Lamb Lakeshore Dairy and Lamb Farms own the anaerobic digesters and are working in partnership with Brightmark on the project. The New York State Energy Research and Development Authority is also providing $1.5 million in funding toward the upgrades to the digesters.

Transform Your Waste.

Let's team up and turn your farm waste into renewable natural gas.