The City of Kyle is advancing a major expansion of its Wastewater Treatment Plant (WWTP) to meet rapid population growth, strengthen system resilience and comply with evolving regulatory requirements. As lead engineer, STV is accelerating Phase 2 of the nearly $200 million investment by delivering a design amendment and early works package that will double treatment capacity – from 4.5 million gallons per day (MGD) to 9.0 MGD – while introducing advanced nutrient removal and reclaimed-water capabilities ahead of the original schedule.
What challenges is STV addressing?
Kyle’s population has increased more than 800% since 2000 and is projected to continue growing, placing pressure on aging infrastructure to keep pace with demand. The expansion must be delivered within an active treatment facility, meet stricter regulatory standards and provide additional capacity quickly – without sacrificing reliability, long-term performance or environmental stewardship. Coordinating permitting, bidding and construction under an accelerated timeline adds further complexity.
What solutions is STV delivering?
STV is overseeing design, permitting, bidding and construction-phase services for a comprehensive suite of improvements. These include expanded aeration basins for phosphorus removal; a larger headworks facility with upgraded ventilation; a new 7,000-square-foot grit removal building; four new clarifiers; biotrickling filters for odor control; and a filtration system capable of producing Type-1 reclaimed water. The accelerated delivery will bring new capacity online approximately 22 months earlier than planned, with the first phase operational in late 2026.
How will this project benefit Kyle and the region?
The expanded WWTP will support sustainable growth, protect local waterways and improve operational flexibility for decades to come. By delivering up to 6 MGD of Type-1 reclaimed water by November 2026 and the full 9 MGD by September 2028, the project helps the City of Kyle responsibly manage growth while advancing long-term water resource resilience.
Key Stats and Accolades
- Capacity increase from 4.5 MGD to 9.0 MGD
- Accelerated delivery: ~22 months ahead of schedule
- Type-1 reclaimed water capability for ponds, lakes, and rivers
- STV serving as lead engineer for design through construction support
