37 Construction, installation, laying, repair, refurbishment, modification and maintenance of pipes, pipelines, pipeline systems, and pipe couplings, gaskets, and connectors; construction services in the nature of pipe fitting services, namely, the connection of pipelines and repair of pipelines and connectors; construction of compressor stations, cross-compressor installations, plant facilities, pumping stations, and horsepower additions for pipelines and pipeline facilities; construction project management services in the field of pipeline construction, repair, and maintenance; construction project management services; 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; horizontal directional drilling for installing underground pipelines; excavation services; advisory services relating to excavation; construction services, namely, core boring and restoration; construction services, namely, site clearing, site restoration, and excavation; ash removal services; sludge removal services; debris removal services; installation, maintenance and repair of electrical transmission and distribution power lines; telecommunication wiring; installation, maintenance and repair of telecommunications equipment; installation, maintenance and repair of fiber optic networks; horizontal directional drilling for installing telecommunications cables; emergency servicing of apparatus for supplying electricity, namely, repair of power lines; construction of manholes; construction services, namely, manhole adjusting