Military Job #2
Concrete Storm Ditch, Marine Corp Air Station, Beaufort, SC
Award Price: $3,397,000
Architect: CEMS Engineering
Project Delivery: Design-Bid-Build
This project consisted of the demolition and subsequent construction of over 1,000 ft. of drainage basin at the MCAS Beaufort. The existing basin was exposed concrete and was a main section that received runoff from the main runway. At the beginning of the job a pump system was installed to intercept water as it came off the runway and pump it around the construction area. Once the pumping system was online the old concrete ditch was totally demolished and hauled off site. New structural fill and rock base was brought in and compacted to prep for the new poured in place box culvert system throughout the entire bottom of the existing ditch. The new culvert system was formed and poured in place with two connected side by side 6 x 10 runs. The foundation and top consisted of 12″ concrete with both outer walls and divider wall being 8″ thick.
New precast junction boxes were also installed at all the tie ins where existing drain pipes dumped from the runway. Once the underground culvert system and junctional boxes were installed, the entire site was backfilled and brought up to grade with new fill. It was shaped and contoured to allow for drainage and hydro-seed. The project location at one of the entry points to the flight line made safety very important. The everyday use, pieces of heavy equipment, skids steers, pump trucks, and a crane made traffic control around the busy area very important. We were able to do road closures for asphalt and concrete curb repair during off hours to not inhibit daily access.