Posting Language
Title
Authorize an amendment to the contract for engineering services for the Williamson Creek Wastewater Interceptor Project for Austin Water with CAS Consulting and Services, Inc., to increase the contract amount by $7,443,884, for a revised total contract amount not to exceed $14,490,600. Funding: $7,443,884 is available in the Capital Budget of Austin Water.
Body
Lead Department
Austin Financial Services.
Managing Department
Austin Capital Delivery Services.
Fiscal Note
Funding is available in the Capital Budget of Austin Water.
Procurement Language:
Contract Amendment.
MBE / WBE:
This contract was previously awarded in compliance with City Code 2-9A (Minority-Owned and Women-Owned Business Enterprise Procurement Program). Current participation to date is 70.18% MBE and 6.23% WBE.
Prior Council Action:
May 30, 2024 - Council approved an amendment for additional services to the professional services agreement with CAS Consulting and Services, Inc., for the Williamson Creek Wastewater Interceptor Project.
August 8, 2019 - Council approved an amendment for additional services to the professional services agreement with CAS Consulting and Services, Inc., for the Williamson Creek Wastewater Interceptor Project.
August 4, 2016 - Council approved a professional service agreement with CAS Consulting and Services, Inc. for the Williamson Creek Wastewater Interceptor Project.
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:
January 14, 2026 - To be reviewed by the Water and Wastewater Commission.
May 8, 2024 - Recommended by the Water and Wastewater Commission on a 7-0 vote with Commissioners Penn, Angoori, Musgrove and Tuñón Sion absent.
July 10, 2019 - Recommended by the Water & Wastewater Commission on a 6-5 vote with Commissioners Turrieta, Michel, and Williams absent, and Commissioners Lee and Penn recusing.
July 13, 2016 - Recommended by the Water and Wastewater Commission on a 7-0 vote with Commissioners Blanding, Parker, and Penn absent and Commissioner Turrieta recusing.
Additional Backup Information:
Austin Water’s wastewater collection system is fundamental for the conveyance of wastewater to Austin Water’s wastewater treatment plants. The wastewater collection system is a large and complex system, consisting of approximately 3,000 miles of wastewater mains and serves approximately one million customers. Due to deterioration from the harsh conditions of the wastewater environment, wastewater collection system assets require ongoing repair and replacement in order to prevent sanitary sewer overflows. In addition, portions of the existing collection system are at, or near, capacity during heavy rain events.
The Williamson Creek Wastewater Interceptor Project will replace approximately 18,800 linear feet of deteriorated existing 36-inch and 42-inch segments with a new 72-inch diameter gravity interceptor in the vicinity of South First Street to the Onion Creek Tunnel near William Cannon Drive and South Pleasant Valley Road (manhole # 25295 to junction # 44350). The need for this project was initially identified in long-range planning studies and is a key project in Austin Water’s fiscal year 2025 to fiscal year 2029 Capital Improvement Project plan.
This amendment will provide funding for services to perform the construction phase engineering services, specialty inspections, and close-out services for Williamson Creek Wastewater Interceptor project.
The previous Council authorization provided for preliminary, design and bid phase engineering services.
Parts of the construction will be in City Parkland. Williamson Creek Greenbelt trails will also be temporarily affected in certain areas along the creek, thus restricting public access and use during that time. All disturbed areas will be restored afterward.
This project is specifically for a segment of lower Williamson Creek where the existing sewer interceptor needs to be replaced and upgraded.
The project is located within zip codes 78744 and 78745 (Districts 2 and 3).
AUTHORIZATION HISTORY
|
AMOUNT |
DATE |
DESCRIPTION |
|
$4,000,000.00 |
08/04/16 |
(Council) - Professional Engineering Services |
|
$59,000.00 |
08/04/16 |
(Administrative Authority) - Professional Engineering Services |
|
$2,400,995.53 |
08/08/19 |
(Council) - Professional Engineering Services |
|
$586,720.97 |
05/30/24 |
(Council) - Professional Engineering Services |
|
$7,443,883.85 |
01/22/26 |
Proposed (Council) - Construction Design Services |
|
$14,490,600.40 |
Total Contract Authorization |
CONTRACT HISTORY
|
AMOUNT |
DATE |
DESCRIPTION |
|
$1,103,443.00 |
10/26/16 |
Preliminary Engineering Report |
|
$6,494.23 |
11/08/18 |
SA #1 - Additional Design Services |
|
$1,685,691.23 |
11/14/18 |
SA #2 - 30% Design Services |
|
$3,525,711.52 |
12/03/19 |
SA #3 - Design and Bidding Phase Services |
|
$83,071.44 |
10/08/21 |
SA #4 - Additional Design Services |
|
$55,584.11 |
10/26/23 |
SA #5 - Additional Design Services |
|
$586,720.97 |
05/30/24 |
SA #6 - Additional Design Services through Award |
|
$7,443,883.85 |
Proposed |
SA #7 - Construction Design Services |
|
$14,490,600.40 |
Total Contract History |