Posting Language
Title
Authorize negotiation and execution of an interlocal agreement with the cities of Round Rock, Cedar Park, and Leander for the reimbursement of costs related to the expansion and rehabilitation of a portion of the Brushy Creek Interceptor of the Brushy Creek Regional Wastewater System, with the City's share of funding not to exceed $1,400,000. Funding: $1,400,000 is available in the Capital Budget of Austin Water.
De
Lead Department
Austin Water.
Fiscal Note
Funding is available in the Capital Budget of Austin Water.
Prior Council Action:
July 23, 2009 - Council approved an interlocal agreement to purchase the City’s share of the Brushy Creek Regional Wastewater System from the Lower Colorado River Authority.
September 22, 2011 - Council approved an agreement with the Brazos River Authority for the operation and maintenance of the Brushy Creek Regional Wastewater System.
March 6, 2014 - Council approved an interlocal agreement with the Cities of Round Rock, Leander, and Cedar Park concerning the capacity, operation, maintenance, and improvements to the Southwest Interceptor of the Brushy Creek Regional Wastewater System.
May 18, 2017 - Council approved negotiation and execution of interlocal agreements with the cities of Round Rock, Cedar Park, and Leander for the reimbursement of costs related to the expansion of the Brushy Creek Regional Wastewater System.
May 7, 2020 - Council approved negotiation and execution of an amendment to the agreement with the cities of Round Rock, Cedar Park, and Leander to increase Austin’s reimbursement share related to the expansion of the Brushy Creek Regional Wastewater System.
March 21, 2024 - Council approved negotiation and execution of an interlocal agreement with the cities of Round Rock, Cedar Park, and Leander for the reimbursement of costs related to the expansion of the Brushy Creek Regional Wastewater System.
December 12, 2024 - Council approved negotiation and execution of an interlocal agreement with the cities of Round Rock, Cedar Park, and Leander for the reimbursement of costs related to the rehabilitation of the East Wastewater Treatment Plant of the Brushy Creek Regional Wastewater System.
For More Information:
Inquiries should be directed to Vicky Addie, 512-972-0332 or vicky.addie@austintexas.gov.
Council Committee, Boards and Commission Action:
January 14, 2026 - to be reviewed by the Water and Wastewater Commission.
Additional Backup Information:
The Brushy Creek Regional Wastewater System (Brushy Creek System) is a wastewater system located in southern Williamson County. The cities of Austin, Round Rock, and Cedar Park jointly purchased the Brushy Creek System from the Lower Colorado River Authority in 2009, and each city is a partial owner of the Brushy Creek System. The City of Leander joined the other cities in 2011.
Two wastewater treatment plants (WWTPs) of the Brushy Creek System are located in the City of Round Rock’s jurisdiction and treat wastewater within the Brushy Creek, Onion Creek, Chandler Creek, and McNutt Creek watersheds. The plants are known as the East WWTP and the West WWTP. Austin has approximately 5,007 retail wastewater connections which discharge into the Brushy Creek System (primarily within the Avery Ranch subdivision).
The partner cities have agreed to jointly pursue the expansion and rehabilitation of a portion of the Brushy Creek Interceptor - Downstream Collection System, Nodes P, Q, R and S for the benefit of the cities.
Partner cities will pay their proportionate costs for this expansion and rehabilitation project according to the Project Cost Allocation Percentages as shown in the table below:
It is anticipated that the rehabilitation will be completed by Fiscal Year 2030. The City of Round Rock will bid, manage, and oversee the expansion and rehabilitation project. Each of the cities will reimburse their proportionate share of costs to Round Rock as milestones are achieved.