Trigg Lake Dam Reclassification

Dallas County, Texas is soliciting bids on the Trigg Lake Dam Reclassification project at Dallas Fort Worth International Airport, with proposals due September 30, 2026. The work comprises raising the dam elevation by adding a 7-inch-high by 12-inch concrete wall, armoring the upstream face to prevent erosion, rehabilitating concrete extensions of downstream flumes to improve structural integrity, and rehabilitating the principal spillway to address water infiltration issues.

The contract establishes a total contract time of 360 consecutive calendar days from Notice to Proceed, with Substantial Completion required in 270 calendar days and Final Completion in an additional 90 calendar days. Work may be performed 24 hours per day, 7 days per week, except during specified holiday blackout periods (Independence Day, Labor Day, Thanksgiving, Christmas/New Years, Spring Break, Memorial Day, and World Cup periods through 2027). Construction will occur outside the Airport's Air Operations Area.

Payment is structured on a time-and-material basis for standby-time compensation, with documented Standby Time Work Reports required for any work stoppages resulting from airfield operations. All unit prices constitute full compensation including materials, labor, supervision, equipment, tools, delivery, installation, insurance, applicable taxes, fees, overhead, and profit.

Contractors must obtain Airport Identification Badges and Vehicle Permits at their own expense and coordinate with the Owner's Authorized Representative regarding all work activities. The contract documents incorporate by reference FAA requirements, Texas Department of Transportation standards, and various technical specifications applicable to construction within an active airport environment. Permit Number B25-0599 applies. Technical Specifications document (Version 4.3) prepared by Dunaway Associates, LLC and affiliated Texas-licensed professional engineers is attached.