Winner: Agricultural

Digester Tank/Tangoon

In December 2023, an exciting project began at Dinner Bell Dairy. The first pour of the tank was 770 yards in 8.5 hours. The tank used a total of 1,731 cubic yards of concrete and was completed in March 2024. The tangoon used 2,772 cubic yards of concrete, completed in July.

The tank consisted of Natural Resources Conservation Service approved mix containing fly ash, and walls consisting of a 6000 PSI concrete including Xypex (an additive to improve durability and waterproofing) as well as a superplasticizer (a high-range water reducer that allows for a higher slump, without compromising the strength with added water). The tangoon consisted of an NRCS mix containing slag.

JP Tank expressed excitement over pouring the tank as it is the tallest they have done at 32 feet, one of the largest digester tanks in the country.

Challenges with building this tank were constructing during the cold months and ensuring there were no issues with the complexity of the 6000 PSI mix. Each truck that arrived at the job with 616 yards of concrete, was only allowed 25 minutes to unload to maintain spec.

Project Team Members

Owner: Vanguard Renewables, Inc.
Concrete Supplier: Carew Concrete & Supply
Engineer: Excel Engineering, Inc.
Site/Civil Engineer: MSA Professional Services, Inc.
Contractor: JP TANK INC.