1629  Heavy Construction, Not Elsewhere Classified

Establishments classified in this industry are primarily engaged in
heavy construction projects, not elsewhere classified, such as
chemical complexes, dams and reservoirs, harbor and port facilities,
missile facilities, oil refineries, subways, water and sewer treatment
plants, power plants, industrial ovens and incinerators, athletic
fields, golf courses, and irrigation projects.  This industry also
includes contractors engaged in earthmoving not connected with
buildings and land drainage, leveling and reclamation.