Posting Language
Title
Authorize additional contingency for the construction contract for the Barton Creek - Bank Erosion Restoration at 1732 Toomey Road project for Austin Watershed Protection with Austin Filter Systems, Inc., to increase the amount by $81,000, for a revised total contract amount not to exceed $5,815,545. Funding: $81,000 is available in the Capital Budget of Austin Watershed Protection.
Body
Lead Department
Austin Financial Services.
Managing Department
Austin Capital Delivery Services.
Fiscal Note
Funding is available in the Capital Budget of Austin Watershed Protection.
Procurement Language:
Additional Authorization.
MBE / WBE:
This contract was awarded in compliance with the City Code Chapter 2.-9A (Minority-Owned and Women-Owned Business Enterprise Procurement Program). Current participation is 0.38% MBE and 0.94% WBE.
Prior Council Action:
August 29, 2024 - Council approved a contract with Austin Filter Systems, Inc. for Barton Creek - Bank Erosion Restoration at 1732 Toomey Road.
For More Information:
Direct questions regarding this Recommendation for Council Action to the Austin Financial Services - Central Procurement at FSDCentralProcurementRCAs@austintexas.gov or 512-974-2500.
Additional Backup Information:
The Barton Creek - Bank Erosion Restoration project stabilizes a failed streambank along Barton Creek to protect the Ann and Roy Butler Hike and Bike Trail, restores environmental function, and prevents further erosion within the Barton Creek watershed. The project includes bank stabilization, storm drainage improvements, and construction of an engineered trail bypass to replace an existing informal path and improve long-term trail resilience. The need for the project originated after flood events in 2016 and 2018 caused approximately 215 feet of streambank to fail along the south bank of Barton Creek, bringing the top of the approximately 20-foot bank to the edge of the trail and requiring temporary safety fencing to protect trail users.
During installation of limestone rock riprap along the creek bank, silty channel-bottom soils with lower-than-anticipated bearing capacity caused placed rock to settle, requiring additional material to achieve the required stabilization. In addition, sacrificial soil nails installed for slope stabilization did not initially meet performance standards due to unexpected subsurface conditions. The engineer of record revised the design by increasing soil nail lengths, and installation required substantially greater grout quantities than originally estimated because of voids and soil variability encountered during drilling.
The requested authorization will allow payment for these necessary construction modifications and ensure the completed project meets engineering performance standards, protects the public trail, and achieves Austin Watershed Protection goals related to erosion mitigation and infrastructure protection.
The Ann and Roy Butler Hike and Bike Trail is a heavily used public facility. Construction activities required temporary localized trail adjustments; however, the completed project improves long-term public safety by restoring separation between the trail and the creek bank and reducing the likelihood of future erosion-related impacts or closures.
Approval of this contract is time sensitive to allow construction completion and contract closeout.
This project is located within zip code 78704 (District 8).
AUTHORIZATION HISTORY
|
AMOUNT |
DATE |
DESCRIPTION |
|
$5,145,950.00 |
08/29/2024 |
(Council) - Constructions services for the bank stabilization of Barton Creek |
|
$514,595.00 |
08/29/2024 |
(Council) - 10% Contingency |
|
$74,000.00 |
09/10/2024 |
(Administrative Authority) - Change Orders |
|
$81,000.00 |
04/09/2026 |
Proposed (Council) - Additional Contingency |
|
$5,815,545.00 |
Total Contract Authorization |
CONTRACT HISTORY
|
AMOUNT |
DATE |
DESCRIPTION (CO%/CUMULATIVE CO%) |
|
$5,145,950.00 |
09/10/2024 |
Constructions services for the bank stabilization of Barton Creek |
|
$52,008.82 |
02/19/2025 |
CO #1 - Installation of delineators for bike lane versus water barriers per plan |
|
$515,412.26 |
08/07/2025 |
CO #2 - TCP Revision, Jack and bore adjusted slope and material change, additional soil nail quantity and grout and additional quantity of concrete for leveling pad |
|
$8,000.00 |
11/24/2025 |
CO #3 - Additional sacrificial soil nail quantity |
|
$94,173.92 |
Proposed |
Council - CO #5 -Additional rip rap placement, soil nail length and grout to meet performance standard |
|
$5,815,545.00 |
Total Contract History |