37 construction services, namely grading, pad preparation, paving, excavation services, underground utility construction, grassing, seeding and sodding, hot plant-mixed bitumen courses, construction of minor bridges, barrier walls, curbs and gutters, driveways, retaining walls, lift stations, sinkhole remediation and stabilization, installation of traffic separators, tree removal, tree trimming, installation of fill and base materials, hauling of materials to construction sites, heavy highway construction, construction management and general contracting