A progressive design-build is a project delivery method where an owner hires a single team of designers and builders early and lets the project details, scope and price evolve together as design work advances. Think of it like hiring a contractor to sketch and refine a house with you step by step, rather than agreeing a fixed plan up front; it can speed delivery, improve coordination, and reduce costly surprises. Investors care because it can improve schedule certainty and cost control while shifting more accountability for delivery to one party.
spillwaytechnical
A spillway is the channel or structure on a dam designed to safely release excess water, acting like an overflow drain or pressure‑relief valve for a reservoir. For investors, spillways matter because their design, condition and capacity affect a project’s safety, regulatory approvals, maintenance costs, flood risk and potential hydropower output—issues that can influence liability, operating revenue and the value of infrastructure assets.
seismic analysestechnical
Seismic analyses are studies that measure how the ground and structures respond to earthquakes or other vibrations, using data and models to predict where shaking will be strongest and how materials will behave. Investors use them like a safety and risk checklist—results affect the value, cost, insurance, permitting and timeline of projects or assets located in quake-prone areas, so they influence investment decisions and potential liabilities.
potential failure modetechnical
A potential failure mode is a specific way a product, process, or system could stop working or perform incorrectly—think of it as a particular weak link in a chain or a part that might break in a car. Investors care because identifying these failure modes helps quantify risks to revenue, regulatory approval, safety, and repair or recall costs, which can affect a company’s cash flow, reputation, and stock value.
value engineeringtechnical
Value engineering is a systematic process to redesign a product, project or operation so it delivers the same or better function at lower cost or with fewer resources. For investors, it matters because it can boost profit margins and cash flow without raising prices by cutting waste, simplifying materials, or improving processes—like remodeling a kitchen to get the same look and usability but spend less money and reduce ongoing upkeep.
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PASADENA, Calif.--(BUSINESS WIRE)--
Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end solutions in water, environment, and sustainable infrastructure, announced today that Tetra Tech was selected as lead design engineer, as part of the Kuney Construction and J.F. Brennan team, to provide planning, assessment, engineering, and construction services for the Progressive Design-Build (PDB) Hydropower Dam Spillway Modernization Project for Chelan County Public Utility District (PUD).
Under the single-award, multi-year contract, Tetra Tech’s engineers, scientists, and technical specialists will support the Chelan County PUD and the PDB team to develop new and resilient spillway infrastructure for Rock Island Dam and Rocky Reach Dam in Washington. Tetra Tech will combine advanced subject matter expertise with in-house innovative design capabilities to improve the operational reliability and safety at both hydroelectric dam facilities on the Columbia River, the fourth largest river in the United States by flow. Our teams will conduct critical infrastructure condition assessments; perform structural, mechanical, and electrical analyses to develop new spillway gates, gate auto-hoists and controls; spillway concrete rehabilitation; perform advanced seismic analyses; develop structured risk and potential failure mode (PFM) analyses; perform targeted value engineering studies; and develop innovative design solutions for both dam facilities.
“Chelan County Public Utility District owns and operates the second largest nonfederal, publicly owned hydroelectric generating system in the nation,” said Roger Argus, Tetra Tech CEO. “Tetra Tech is pleased to use our Leading with Science® approach and high-end hydropower expertise to improve the safety and operational reliability of this critical infrastructure and support Chelan County PUD in providing a safe, resilient power supply for their customers.”
About Tetra Tech
Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With more than 25,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, and design sustainable and resilient infrastructure. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn and Facebook.
Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions ("Future Factors"), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section "Risk Factors" included in the Company’s Form 10-K and Form 10-Q filings with the Securities and Exchange Commission.
