Coolidge Municipal Airport, AZ – The project scope included the removal and replacement of 7,400 SY of PCCP, removal and replacement of unstable subgrade, joint sawing and sealing, spall repairs, and striping. All work was completed with minimal impact to daily air traffic, fueling, Marine Corps sky diving training operations and monthly fly-in events.
As the project’s general contractor, DBA proposed a construction sequencing plan that allowed the airport to maintain normal airfield operations. A low slump concrete mix was submitted and approved that would achieve full design strength in seven days. All new concrete was then placed back in service in just one week, instead of during the initially planned four-week shutdown. These factors allowed for all PCCP placement to be done in a total of six weeks.
Unique Innovations: The issue of maintaining a level grade prior to the placement of PCCP was a project challenge due in part to replacing sections in an alternating sequence. DBA shop-fabricated a leveling/grading beam and attached it to the Gannon tractor, supplying an efficient way to grade a narrow stretch of taxiway and apron subgrade.