1. under construction: a structure that is in the process of being built.
  2. ruined: a structure in a decayed or deteriorated condition resulting from neglect or disuse, or a damaged structure in need of repair. (IHO Dictionary, S-32, 5th Edition, 4456)
  3. under reclamation: an area of the sea that is being reclaimed as land, usually by the dumping of earth and other material.
  4. wingless: a windmill or windmotor from which the turbine blades are missing.
  5. planned construction: an area where a future construction is planned.