Granite (NYSE: GVA) today announced that its wholly owned subsidiary, Layne, A Granite Company, has been awarded an approximately $13 million contract by the Lewis and Clark Regional Water System (LCRWS) to construct two high-capacity horizontal collector wells within an existing wellfield adjacent to the Missouri River near Vermillion, South Dakota. The project is funded by federal and member sources and will be included in Granite’s third quarter CAP.

“This project exemplifies the breadth of our water supply construction capabilities, showcasing our expertise in delivering high-capacity water supply solutions in both groundwater and surface water environments,” said Granite Vice President of Regional Operations, Gernot Penzhorn. “It also highlights the regional diversity of our projects.”

Each well is designed with a pumping capacity of 25 million gallons per day (MGD), contributing a total of 50 MGD of raw water supply to the LCRWS. The wells will be constructed as 16-foot inner diameter concrete caissons, reaching an approximate depth of 135 feet.

“Lewis & Clark’s staff and engineers have enjoyed working with Layne on several different well projects through the years, including our first collector well,” said LCRWS Executive Director, Troy Larson. “The top-notch professionals at Layne have always done a great job and we are looking forward to working with them again on our next two collector wells. When completed, the three collector wells will be the heart and soul of our system that over 350,000 people are relying upon in the tristate region.”

In 2021, Layne’s Ranney® Collector Well group successfully constructed the first horizontal collector well for LCRWS at Site B, which produces over 20 MGD, approximately seven times more than any of the system’s conventional wells. The success of that project served as the catalyst for the design and construction of the two new horizontal collector wells at Site C.

LCRWS is a wholesale provider of water to 20 member cities and rural water systems across southeast South Dakota, northwest Iowa, and southwest Minnesota. Layne has supported LCRWS for over two decades, offering professional hydrogeologic services, installation and redevelopment of water supply wells, and pump installation and maintenance.

Construction is expected to begin in September 2025 and be completed in June 2028.

About Granite

Granite is America’s Infrastructure Company™. Incorporated since 1922, Granite (NYSE: GVA) is one of the largest diversified construction and construction materials companies in the United States as well as a full-suite civil construction provider. Granite’s Code of Conduct and strong Core Values guide the Company and its employees to uphold the highest ethical standards. Granite is an industry leader in safety and an award-winning firm in quality and sustainability. For more information, visit the Granite website, graniteconstruction.com, and connect with Granite on LinkedIn, X, Facebook, and Instagram.

About Layne

Layne is a global water management, infrastructure services and drilling company, providing responsible solutions to the world of essential natural resources — water, minerals and energy. We offer innovative, sustainable products and services with an enduring commitment to safety, excellence, and integrity.

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