Hemphill-Lamar Connector
Fort Worth
BEST PROJECT
OWNER: City of Fort Worth
LEAD DESIGN FIRM: TranSystems
GENERAL CONTRACTOR: McCarthy Building Cos.
STRUCTURAL ENGINEER: Aguirre & Fields
SURVEYING: A.N.A. Consultants LLC
GEOTECHNICAL: CMJ Engineering Inc.
ADA COMPLIANCE: K Plus K Associates LLP
SUBSURFACE UTILITY ENGINEERING: Surveying and Mapping Inc.
LANDSCAPING/IRRIGATION: Thompson Landscape Architects Inc. name
Related link: ENR Texas/Louisiana Best Projects 2021
The $31-million Hemphill-Lamar Connector in Fort Worth involved building a four-lane, 400-ft-long tunnel under the city’s primary east-west freeway and relocating four active rail lines near one of the country’s busiest rail intersections.
![Hemphill-Lamar Connector](/ext/resources/Issues/TXLA/November/TranSystems-04.jpg)
Photo courtesy of TranSystems
Through staged construction, detailed scheduling and coordination with 11 key stakeholders, the project team completed the connector five months ahead of schedule and nearly $4 million under budget.
![Hemphill-Lamar Connector](/ext/resources/Issues/TXLA/November/TranSystems-05.jpg)
Photo courtesy of TranSystems
Building the bridge for the new rail lines took place in four phases—two adjacent to live rail traffic and two in the middle of active tracks.
![Hemphill-Lamar Connector](/ext/resources/Issues/TXLA/November/TranSystems-06.jpg)
Photo courtesy of TranSystems
In excavating the area under Interstate 30 and the rail tracks, the team encountered extremely hard limestone approximately 7 ft below grade and faced the challenge of having to mine solid rock while working with low overhead clearance.
![Hemphill-Lamar Connector](/ext/resources/Issues/TXLA/November/TranSystems-07.jpg)
Photo courtesy of TranSystems
Underpass construction beneath active auto and train bridges required significant shoring, including rock anchors and sprayed concrete to prevent cave-ins. The horizontal and vertical curvature of the roadway under the bridges and between the two intersections complicated building the retaining walls and roadway alignment, so a full-time survey crew checked each wall segment to ensure accuracy.
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