STV Wins Key Project to Design Wastewater Treatment Plant Expansion in Central Texas 

KYLE, TX – STV, a professional services firm that plans, designs and manages infrastructure projects across North America, today announced that it has signed a contract with the City of Kyle, Texas, to serve as lead design engineer for the second phase of the city’s Wastewater Treatment Plant (WWTP) expansion. STV’s work will double the plant’s current capacity from 4.5 million gallons per day (MGD) to 9 MGD and incorporate a new total phosphorus limit of 0.5 mg/L, which is currently being finalized as part of the plant’s permit amendment. The expansion will equip the city to meet the increasing infrastructure needs of its rapidly growing community.  

STV will provide a full suite of planning and design services for Kyle’s WWTP, including the development of a nutrient management strategy and the installation of vital equipment that will double the plant’s flow capacity while meeting strict water quality permit limits.  

Located approximately 20 miles south of Austin, Kyle is set to become the most populous city in Hays County within the next 10 years. Since 2000, the city’s population has grown more than 800%, from 5,000 residents to more than 50,000 in 2022, according to the city’s census data. When the city’s existing wastewater treatment plant was reaching capacity, Kyle embarked on a major expansion project in 2020 that increased average daily plant capacity from 3.0 MGD to 4.5 MGD. STV provided value engineering and TCEQ permit renewal support. In Phase 2, the firm will lead the necessary improvements to increase flows that can be treated and discharged to 9.0 MGD, doubling the plant’s capacity. 

“Kyle is a fast-growing city and this project’s swift completion is key to maintaining the city’s service to their community,” said Lindsay Webb, P.E., project manager at STV. “Through our longstanding relationship with the City of Kyle, STV’s local knowledge and technical expertise is addressing this region’s crucial needs for water and wastewater infrastructure, while helping the community anticipate additional infrastructure expansion needs to create the most efficient plant.” 

Since 2017, STV has provided the City of Kyle with design services for roadways and traffic signals, wastewater interceptors and lift station improvements, as well as survey services for the city. The plant expansion is the largest collaboration to-date between the city and STV. 

STV has extensive experience with water and wastewater infrastructure in Texas and across the U.S. In Austin, STV served as lead designer for the rehabilitation and improvement of the South Austin Regional Wastewater Treatment Plant, one of the city’s two major municipal treatment facilities. In Dallas, STV converted the Central Regional Wastewater System’s grit removal basins to higher-capacity vortex basins. In San Antonio, STV provided a full suite of design and construction management services for the Vista Ridge Regional Supply Project (VRRSP), the largest public-private partnership (P3) water project in North America at the time of its completion. As a result, VRRSP supplies 20 percent more water for the San Antonio region, providing water security and meeting the needs of the rapidly growing community.