SIC for "excavation"
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1794 - Excavation Work
Special trade contractors primarily engaged in excavation work and digging foundations, including digging and loading. Contractors in this industry may also perform incidental concrete work. …Examples: Excavation work - contractors, Foundation digging (excavation) - contractors -
1799 - Special Trade Contractors, Not Elsewhere Classified
Special trade contractors primarily engaged in construction work, not elsewhere classified, such as construction of swimming pools and fences, erection and installation of ornamental metal work, house moving, shoring work, waterproofing, dampproofing, fireproofing, sandblasting, and steam cleaning of building exteriors. …Examples: Antenna installation, except household type - contractors, Artificial turf installation - contractors, Awning