STV wins project to design WWTP expansion for Kyle, Texas

Aug. 29, 2023
STV will help to double the Kyle, Texas plant’s wastewater treatment capacity from 4.5 MGD to 9 MGD and to incorporate a new total phosphorus limit of 0.5 mg/L.

STV, a professional services firm that plans, designs and manages infrastructure projects, 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 help 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 said that it 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 equipment to increase the plant’s flow capacity.

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 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, 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.

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Image courtesy Institute of Chemical Research of Catalonia (ICIQ).