PILLAR: Sustainable
AGENDA DATE: October 22, 2025
COUNCIL DISTRICT(S): 6
DEPARTMENT: Dallas Water Utilities Department
PRIORITY: N/A
______________________________________________________________________
SUBJECT
Title
Authorize an increase in the construction services contract with Rebcon LLC for additional work associated with the Bachman Dam and Spillway Improvement Project - Not to exceed $1,017,556.72, from $43,179,000.00 to $44,196,556.72 - Financing: Water Construction Fund
Body
BACKGROUND
On September 27, 2023, the City Council authorized a construction services contract for the Bachman Dam and Spillway Improvement Project with Rebcon LLC. The project includes the rehabilitation of the Bachman dam and spillway to address regulatory flood capacity as well as structural and stability recommendations. These improvements will ensure dam safety and regulatory compliance, minimize flood risk, and allow residents to enjoy the lake for years to come. The rehabilitation improvements will significantly reduce the potential of a breach by replacing the existing service spillway to improve capacity along with moving and widening the auxiliary spillway to pass flood events safely. Additional improvements include hardening the earthen embankment to protect the dam and comply with Texas Commission Environmental Quality dam safety guidelines, replacement of the railroad bridge that spans the existing spillway used for deliveries to the Bachman Water Treatment Plant, and replacement of the trail along the top of the earthen dam.
A significant amount of the project has included excavation and earth work, structural improvements, and concrete work at the existing spillway, railroad bridge and Bachman Branch outfall. During the course of construction, additional work outside the scope of the original contract has been required to remove and replace unsuitable subgrade materials, clear vegetation downstream of the spillway to ensure proper water conveyance, and complete concrete placement and slope repairs. In addition, alignment adjustments were made to the Bachman Trail on the northside of the dam to eliminate the need to remove trees, modifications were made to the auxiliary spillway to add rock riprap, articulated concrete blocks were added the backside of the dam for slope protection, modifications were made to the electrical circuit supporting the piezometers for dam safety monitoring, repairs were made to a Bachman Water Treatment Plant pipeline and pavement in the area of construction, and debris was removed from the face of the dam beyond the limits of the project.
This action will authorize an increase in the construction services contract with Rebcon LLC, for the Bachman Dam and Spillway Improvement Project and all additional work necessary to complete the project. The project is nearing completion and is currently estimated to be complete by the end of 2025.
ESTIMATED SCHEDULE OF PROJECT
Began Construction November 2023
Complete Construction December 2025
PRIOR ACTION/REVIEW (COUNCIL, BOARDS, COMMISSIONS)
On September 27, 2023, the City Council authorized a construction services contract with Rebcon LLC, for the Bachman Dam and Spillway Improvement Project, by Resolution No. 23-1357.
FISCAL INFORMATION
|
Fund |
FY 2026 |
FY 2027 |
Future Years |
|
Water Construction Fund |
$1,017,556.72 |
$0.00 |
$0.00 |
Construction $43,179,000.00
Change Order No. 1 (this action) $ 1,017,556.72
Total $44,196,556.72
LOCAL PARTICIPATION
|
Prime |
Status |
Workforce % |
|
Rebcon Construction, LLC |
Non-local |
32.32% |
OWNER/EXECUTIVE
Rebcon LLC
Danny Krieg, President
MAP
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