Construction of buildings, namely, airports, office or residence towers, subway or railway stations, parking structures, hotels, and museums; construction of public infrastructural structures, namely, roads, expressways, tunnels, subway or railway lines, ports, docks, dikes, canals, piers and bridges; construction of structures involved in energy generation, namely, hydroelectric power stations, thermal power stations, and nuclear power stations; excavation of trenches or walls in the ground; construction services, namely, installation of structural foundations; foundation contractor services; ground treatment and ground improvement services, namely, cement or chemical grouting; installation of deep foundations; specialty geotechnical construction, installation of earth retention and slope stabilization systems using rock and soil anchors; land reclamation