Project Description Primer's work at RAFIC HARIRI INTERNATIONAL AIRPORT involved the rehabilitation of the existing breakwater of the airport's runway (length 2.3 km) by increasing the top level of the breakwater, replacing the existing concrete blocks according to the new design and profile, removing broken blocks, casting and installing new concrete blocks with volumes ranging from 6.5 to 20.5 m3, installing rock layers and dredging soil underwater to ensure the designed draft level of the channel between the breakwater and the runway.