Cerrudo Services repaired 800 feet of riprap and approximately 325 feet of concrete curb paving at the US Coast Guard Air Station in South San Francisco. A seawall protects the Air Station flight line and parking lot from tidal erosion and wind waves. Rip rap consisted of 1,500 tons of 200 lb class and ¼ ton class stones. The curb repair required the demolition of a 20” high existing curb and 1,650 SF of asphalt with underlying concrete slab. Unlike the demolished curb, the new curb and slab contain rebar reinforcement.
Communication and coordination with the Air Station was critical to the success of the project. Due to the frequency of HH-65 Dolphin rescue helicopter operations in and around the construction site, an ongoing exchange of schedules and work plans from both Cerrudo Services and the Coast Guard were crucial for maintaining construction deadlines and work site safety. The use of heavy equipment, the dumping, loading, and hauling of materials, and riprap installation all occurred in Coast Guard fueling areas and rescue helicopter flight paths. The overlapping of construction efforts and helicopter operations required meticulous attention to job site cleanliness to eliminate any potential foreign object damage to the helicopters.