In 2024 and 2025, Vangard Renewables & Cemstone completed construction of a Digester Tank (3 million gallons), a Hydrolysis Tank (330,000 gallons), and a Digestate Storage Lagoon measuring 395 feet by 255 feet with a depth of 26 feet—providing approximately 12 million gallons of digestate storage capacity—in River Falls, Wisconsin.

Although the project is located on the Peterson Farm, the system primarily processes food waste from industrial facilities that would otherwise be sent to landfills. Through the anaerobic digestion process, this material is converted into renewable natural gas, which is then injected into the natural gas grid.

The three structures required approximately 3,500 cubic yards of concrete and 291 tons of reinforcing steel. Due to the aggressive chemical environment within the digester, the concrete mix incorporated an integral crystalline waterproofing admixture to enhance long-term durability. This proved especially critical during leak testing, as the admixture sealed minor weeps and hairline cracks that could have allowed water intrusion and required additional repairs. Additional challenges included sandy subsurface soils that drew moisture from the 0.42 w/cm concrete mix, as well as winter conditions during placement of the Digester. All structures were constructed in compliance with ACI 350 standards.