1794  Excavation Work

Establishments classified in this industry are primarily engaged in
excavation work and digging foundations for buildings and in
subdividing and preparing land owned by others for future building
erection.  Contractors primarily engaged in concrete work are
classified in Industry 1771, Concrete Work Special Trade
Contractors.  Contractors primarily engaged in trenching or in
earth moving and land clearing not related to building
construction are classified in Industry 1629, Heavy Construction
Contractors, Not Elsewhere Classified.