Replacing an aging water treatment plant to meet increasing demand.
Key Services
Construction
Self-Perform
Strategic Partnerships
Delivery Method
Design-Build (DB)Capacity
2 MGDThe challenge
The City of Bonner Springs, a rapidly growing suburb west of Kansas City, faced a critical challenge as its aging water treatment plant could not meet increasing demand, particularly during peak summer months. To address this issue, the city engaged CAS Constructors to design and build a new $29 million, 2 MGD water treatment plant capable of meeting both current and future demand. The project presented several challenges, including managing extreme market volatility that threatened cost and schedule stability, integrating advanced water treatment technologies like greensand filtration and nano-filtration, and addressing the needs of new service areas, such as the Lake of the Forest community. Furthermore, self-performing major scopes of work and maintaining collaboration among stakeholders required precise coordination and adaptability throughout construction.

Key Facts
City’s largest capital improvement project to-date
Self-performed excavation, concrete formwork and process equipment installation
Challenge met
The CAS Constructors team successfully delivered the new Bonner Springs Water Treatment Plant by leveraging the design-build method, which provided continuous cost and schedule tracking to mitigate the impact of market volatility. By collaborating with the city during design development, the team was able to adjust project scope in real time, ensuring budget alignment without compromising essential features.
Self-performing key scopes of work, including excavation, concrete formwork, and process equipment installation, allowed the team to maintain quality control and meet the project’s tight timeline.
Advanced technologies, such as greensand filtration and nano-filtration, were integrated to address the city’s water quality issues, while the addition of a new raw water well, storage clearwell, and booster pump station ensured expanded capacity and service reach. The completed plant now provides Bonner Springs with autonomy and a reliable, high-quality water supply.