Posting Language
Title
Authorize an amendment to the construction contract for the Walnut Creek Wastewater Treatment Plant Expansion to 100 Million Gallons per Day Project with MWH Constructors Inc., to increase the contingency by $600,000,000, for a revised total contract amount not to exceed $1,500,000,000. Funding: $600,000,000 is available in the Capital Budget of Austin Water.
Body
Lead Department
Financial Services Department.
Managing Department
Capital Delivery Services.
Fiscal Note
Funding is available in the Capital Budget of Austin Water.
Procurement Language:
Contract Amendment.
MBE / WBE:
This contract was awarded in compliance with City Code 2-9A (Minority-Owned and Women-Owned Business Enterprise Procurement Program). Current participation to date is 9.95% MBE and 7.32% WBE.
Prior Council Action:
December 8, 2022 - City Council approved Construction Manager-at-Risk methodology
May 30, 2024 - City Council authorized negotiation and execution of a contract for pre-construction and construction services for the Walnut Creek Wastewater Treatment Plant Expansion to 100 Million Gallons per Day project with MWH Constructors Inc. in an amount not to exceed $900,000,000.
For More Information:
Direct questions regarding this Recommendation for Council Action to Austin Financial Services - Central Procurement at: FSDCentralProcurementRCAs@austintexas.gov or 512-974-2500.
Council Committee, Boards and Commission Action:
March 11, 2026 - To be reviewed by the Water and Wastewater Commission.
Additional Backup Information:
The Walnut Creek Wastewater Treatment Plant (WWTP) is undergoing an expansion from its current permitted capacity of an average daily flow of 75 million gallons per day (MGD) and a 2-hour peak flow of 165 MGD to an average daily flow of 100 MGD and a 2-hour peak flow of 300 MGD. This expansion is needed based on projected future flows of wastewater into the plant, in accordance with Texas Commission on Environmental Quality (TCEQ)...
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