Construction and construction management of tunnels and underground structures; Construction and maintenance of pipelines; Construction grading services; Construction of buildings, roads, bridges and dams; Construction of civil engineering structures by forming concrete; Construction of civil engineering structures by laying concrete; Construction of civil engineering structures by pouring concrete; Construction of civil engineering structures using concrete; Construction of civil engineering structures; Construction of roads, underground utilities, and housing pads; Construction of steel structures; Construction of retaining walls; Construction project management services; Construction project management services in the field of heavy and civil construction, namely, bridge, concrete, water main and utilities, and roadway and related work; Construction services, namely, excavation; Construction services, namely, grading; Construction services, namely, manhole adjusting; Custom construction of bridges; Custom construction of motorways; Excavation services for construction sites; Laying and construction of pipelines; On-site construction supervision; Pipeline construction; Pipeline construction and maintenance services; Pipeline construction and maintenance; Provision of construction advice; Road construction; Street construction