CONSTRUCTIONAMENDED

City of Austin Climate, Water, Environment, and Parks Committee Meeting Transcript Feb 2026

Austin Amends Walnut Creek CMAR Contract to $1.5 Billion

$900,000,000 initial authorization; proposed increase of $600,000,000 for a total value of $1,500,000,000City of Austin cityMWH CONSTRUCTORSFebruary 25, 2026

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Description

Austin Water plans to amend its construction manager at risk contract with MWH Constructors for the Walnut Creek Wastewater Treatment Plant expansion and modernization, increasing the total authorization from $900 million to $1.5 billion. The project will expand capacity, upgrade treatment to biological nutrient removal, add flood protection, and is scheduled for completion around 2032 while maintaining continuous 75 MGD operations.

Contract Details

Contract Amount

$900,000,000 initial authorization; proposed increase of $600,000,000 for a total value of $1,500,000,000

Vendor

MWH CONSTRUCTORS

Agency

City of Austin city, TX

Contract Type

CONSTRUCTION

Document Date

February 25, 2026

Contract Term

Construction through approximately 2032; construction started October 2025 with multiple GMP packages

Renewal Date

2032-12-31

Renewal Info

Amendment increases CMAR authorization by $600 million over the original May 2024 approval; project delivered in eight GMP packages with ongoing value engineering and cost savings identified during preconstruction.