To remedy excessive steel corrosion and plate section loss in the J1A Culvert at DFW International Airport, Freese and Nichols completed a design study, structural evaluation and hydraulic modeling for five reconstruction options. The team determined an estimate of probable construction cost and life cycle cost analysis to provide the best long-term durability and the lowest initial and life cycle costs.
Freese and Nichols also provided construction management and construction phase engineering services for the culvert design. The project included constructing an 18-foot cast-in-place concrete lining in existing corrugated metal. In addition, the team constructed a 24-foot diameter, 2,800-foot-long storm drain tunnel under the main airport runway. The project's construction cost totaled $10 million, and construction was completed three months ahead of schedule.