Challenge Design-Build Project Delivery Addressed

TxDOT chose design-build delivery to capture these benefits:

• Ability to manage a complex traffic control plan without significantly inconveniencing the traveling public by using the unpopular traditional method
• Significantly faster completion compared to conventional delivery which would add years to the project duration
• Appropriate transfer of complex risks to a single entity with a single point-of-contact for all stakeholders
• Elimination of designer and builder disagreements through promotion of a truly collaborative team to reduce disputes, eliminate of claims and mitigate potential litigation between various parties

Summary

TxDOT needed to rapidly replace two Interstate bridges over the Trinity River in downtown Dallas and ease traffic congestion, while keeping half a million vehicles daily moving. PLC and WSP/AECOM deployed a complex plan to maintain traffic flow, while building most new work away from vehicles. The team used concrete spliced girders to span the river, protected and kept major utilities in service, and eliminated left exits and other complicated movements to streamline traffic flow.

Design-Build Team

Client/Owner: Texas Department of Transporation
Design-Builder: Pegasus Link Constructors, LLC
General Contractor: Pegasus Link Constructors, LLC
Engineer: WSP USA INC.
Specialty Contractor: American Bridge Company
Specialty Consultant: Huitt-Zollars, Inc.
Duration of Construction: 35 months
Project Cost: $723,000,000