What's Happening?
McCarthy Building Companies has achieved a significant milestone in the $168 million expansion of a water treatment plant in Mesa, Arizona. The project, which began in January 2024, includes the construction of a second reservoir with an 8-million-gallon
capacity. Due to the soft soil in the area, McCarthy implemented a leak-detection system beneath the reservoir to prevent potential settlement and leakage issues. This system includes a layer of rock and perforated pipes to detect and address any leaks. The project is part of Mesa's long-term water operational strategy and is expected to be completed by October.
Why It's Important?
The expansion of the water treatment plant is crucial for Mesa's water management strategy, ensuring a reliable water supply for the East Valley region. The implementation of advanced leak-detection technology highlights the importance of innovation in infrastructure projects, addressing potential challenges proactively. This project not only enhances the city's water infrastructure but also demonstrates effective collaboration between contractors and engineers, setting a precedent for future infrastructure developments. The successful completion of this project will contribute to the region's economic growth and sustainability.
What's Next?
Phase two of the project will double the plant's treatment capacity from 24 million to 48 million gallons per day. Planned work includes the addition of a mirrored sand-ballasted flocculation system and ozone generation for disinfection. McCarthy expects to complete phase two by early summer 2027. The project will continue to utilize innovative construction techniques and collaboration to ensure timely and efficient completion. The expansion will play a vital role in supporting the region's growing water demands and enhancing the overall water management system.













