Detroit Metro Airport Rehabilitation of Runways and Associated Taxiways
As part of a large design team, C&S designed the pavement geometry, demolition plans, grading, soil erosion and sediment control, utility improvements, navaids modifications and technical specifications for the rehabilitation of portions of Runway 3L/21R and reconstruction of portions of Runway 9L/27R and associated taxiways at Detroit Metro Airport. The $60 million project included approximately 220,000 square yards of Portland cement concrete pavement reconstruction, associated bituminous shoulder reconstruction, and approximately 120,000 square yards of pavement rehabilitation for Runway 3L/21R. The project also included construction of new Taxiway G extension and realignment of existing taxiways.
As part of the geometric design, C&S developed and evaluated different alternatives for improving the taxiway intersections with Runway 9L/27R. The existing alignment of some taxiways within the project limits did not provide acceptable safety per recently updated FAA standards for runway-taxiway intersections. Alternatives for improving the taxiway geometries were reviewed with a focus group that included the Wayne County Airport Authority, FAA and airport stakeholders. The ultimate geometric layout designed for this project included the construction of Taxiway G extension, realignment of Taxiway F, partial relocation of Taxiway H, and relocation of Taxiway V-2. The new geometry will improve the overall safety of the taxiway intersections and improve airfield operations. The geometric design also included determining the most demanding design aircraft and the addition of lead-ins and fillets at taxiway intersections based on auto-turn software analysis.
C&S completed the design of utility improvements within the pavement reconstruction limits, including electrical power and control cables. To supplement the utility records research and topographic survey, C&S used ground penetrating radar along the pavement reconstruction areas to confirm records, provide utility information where records were lacking, and identify any discrepancies. The ground penetrating radar provided location and depth of utilities in the project limits. In addition, the utility design included special provisions to protect the existing utilities during the demolition of the existing runway and taxiway pavements.
During construction, C&S was responsible for daily construction inspection including civil, electrical, utilities and airport pavement construction. In addition, C&S performed on-site weekly inspections during construction as required by Michigan certified storm water operators. C&S was also responsible for construction administration services, including shop drawing reviews, responding to RFIs, reviewing change orders and participating in pre-construction and weekly progress meetings.
The design of the project was completed under an accelerated schedule. The scope of the project was increased significantly and accelerated to take advantage of available federal stimulus funding. The project won an award of excellence from the Asphalt Pavement Association of Michigan for the overlay of Runway 3L/21R.