37 Construction, installation, laying, repair, refurbishment, modification and maintenance of pipes, pipelines, pipeline systems, pipeline terminals and storage facilities for pipelines, pipe couplings, gaskets, and connectors; assembly services relating to the installation of pipes, namely, the connection of pipelines; repair of pipelines and pipeline connectors; construction of compressor stations, cross-compressor installations, plant facilities, pumping stations, meter stations, and horsepower additions for pipelines and pipeline facilities; construction services, namely, site clearing, restoration building sites, and excavation; construction services, namely, trenching in the nature of excavation and boring services for underground utility systems; construction project management services in the field of pipeline construction, repair, and maintenance; construction project management services, namely, budgeting of projects, constructability reviews, estimation of projects and feasibility studies; construction dewatering, namely, the removal of surface waters and groundwater to facilitate the construction of pipelines; covering, coating, and maintenance of pipelines; under-water installation services, namely, underwater installation of pipelines and connectors; hydro excavation services; pipeline pigging for the purpose of cleaning pipelines and cleaning services; installation of grease traps; industrial vacuum cleaning services via vacuum trucks; mining services, namely, longwall mining