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McCarthy Building Starts $202.5M North Texas Water Treatment Plant Expansion

McCarthy Building Co. begins $202.5M expansion at Tom Harpool Water Treatment Plant in Texas. Project with UTRWD and Carollo Engineers aims to double plant capacity, improve water treatment and provide resources to surrounding communities. Expected completion in 2028.

November 12, 2025 - West Edition #23
starlocalmedia.com, McCarthy Cos.

An overhead view of the Tom Harpool Water Treatment Plant
McCarthy photo
An overhead view of the Tom Harpool Water Treatment Plant

McCarthy Building Co. broke ground recently on Phase 2 of the Tom Harpool Water Treatment Plant expansion, according to starlocalmedia.com.

The project in Providence Village, Texas, is a partnership with the Upper Trinity Regional Water District (UTRWD) and Carollo Engineers.

When the project is completed in 2028, the expansion will double the plant's capacity from 30 to 60 million gal. per day, boost water treatment and provide water resources to the neighboring northern Denton and Collin County communities, starlocalmedia.com reported.

The expansion includes infrastructure upgrades, plant equipment installations and advanced water treatment technology.

The project "will be vital to sustaining the health, vitality and resilience of North Texas for generations to come by expanding access to critical water resources," according to a McCarthy press release. The company said the project will create more than 150 construction jobs.

McCarthy said some of its construction and trade partners include H₂O Innovations, Alterman Inc., Smith Pump Co. Inc., The Scruggs Co., J&S Valves and DN Tanks.

The nonprofit government agency serves approximately 29 cities and utility providers. UTRWD provides treatment services for rainwater, solid waste, drinking and non-potable water in a 950-sq.-mi. service district in the Dallas-Fort Worth suburbs.

"We're grateful for the support of our design partner Carollo Engineers as well as the assistance from the Texas Water Development Board for providing project financing through the State Water Implementation Fund for Texas," said Larry Patterson, the UTRWD executive director.

The district is providing $40.5 million in local funding, while another $162 comes from the Texas Water Development Board's State Water Implementation Revenue Fund for Texas.

Scott Hoff, executive vice president of Carollo, said his company has worked with UTRWD for more than 25 years. He anticipates continued collaboration to boost water treatment for thousands of North Texans, according to starlocalmedia.com.

"The fast-growing north service area continues to demand expanded water infrastructure," Hoff said. "This project will incorporate advanced treatment technologies and resilient design features to position the facility to meet the region's long-term needs."


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