City Of Kyle Advances $250M Wastewater Expansion With STV's Accelerated Design

Phase 2 Design Amendment Positions Project Nearly Two Years Ahead of Schedule

STV today announced a major design amendment and early works package that accelerates Phase 2 of the City of Kyle’s Wastewater Treatment Plant (WWTP) expansion. As part of the city’s $200M-plus investment in its wastewater treatment improvements, STV is leading the expansion project, introducing advanced nutrient removal technologies and upgraded equipment to double the plant’s flow capacity and achieve compliance with new regulatory requirements ahead of schedule.

“This expansion is about more than just capacity, it’s about resilience,” said Lindsay Webb, vice president and water area manager for STV’s Central Texas region. “Our partnership with Kyle will strengthen infrastructure for decades, supporting sustainable growth, compliance and environmental stewardship.

The accelerated timeline will deliver treatment capacity 22 months ahead of the original schedule, with the first phase expected to be operational in late 2026. As lead engineer, STV is overseeing design, permitting, bidding and construction phase services for enhancements including:

• Expanded aeration basins for phosphorus removal
• An expanded headworks facility with upgraded ventilation
• A 7,000-square-foot grit removal building
• A filtration system enabling Type-1 reclaimed water output
• Four new clarifiers for improved water quality
• Biotrickling filters for odor control

These improvements will increase capacity from 4.5 million gallons per day (MGD) to 9.0 MGD, ensuring the city can keep pace with rapid growth. Kyle’s population has surged more than 800% since 2000 and is projected to become Hays County’s largest city. To meet this demand, the facility improvements are anticipated to deliver 6 MGD of type-1 water by November 2026 and the full 9 MGD by September 2028. Type-1 reclaimed water is the highest quality short of potable, that’s safe for ponds, lakes and rivers.

“Moving quickly on critical infrastructure projects like this is essential to better serving our residents and keeping pace with Kyle’s growth,” said Mike Murphy, water utilities director for the City of Kyle. “With STV as an integral partner, we’re delivering this project nearly two years ahead of schedule while maintaining the quality, reliability and long-term performance our community expects.”

The city’s WWTP expansion is part of a broader infrastructure strategy to plan for Kyle’s growth and protect water resources. STV has worked with the city on important water and wastewater projects since 2017, delivering design services for wastewater interceptors and lift station improvements and the development of the city’s Water and Wastewater Master Plans as well as the Aquifer Storage and Recovery Study. These plans address short-term and long-term water supply needs and identify future opportunities for resource recovery and reuse.

For over 45 years, the firm has a proven track record of developing and implementing integrated management strategies for water, wastewater, water resources and resource recovery projects across the Mid-Atlantic and the United States, including the Passaic Valley Sewerage Commission Resilience Improvements in Newark, New Jersey, resilience upgrades at the The Red Hook Wastewater Resource Recovery Facility, the award-winning Vista Ridge Regional Supply Project in San Antonio, Texas; the Walnut Hill Pump Station in Dallas, Texas, and the Owasso Wastewater Treatment Plant in Owasso, Oklahoma.

About STV
STV is one of the top infrastructure-focused professional services firms in North America. Founded in 1912, STV advises, plans, designs, engineers and delivers the infrastructure that powers local economies, including transportation systems, buildings, water and other facilities. Headquartered in New York City, the company has more than 65 offices and 3,300 employees who reimagine the solutions and structures that connect our communities. The firm is ranked 34th in Engineering News-Record’s Top 500 Design Firms survey and is 11th in its transportation category. For more information, visit stvinc.com.