From Star Trek Freedom's Wiki
Utopia Planitia is a vast lava plain on the planet Mars, and location of the surface structures of the starship construction facility, the Utopia Planitia Fleet Yards, one of the Federation's most extensive construction yards. Probably, all surface-based facilities are also part of the Martian colonies.
|Space Facilities: Starbase Valhalla | Mars Defence Perimeter | Production Facility|
|Ground Facilities: ATTU Center | Otono Medical Centre | Civilian Sector|
|Departments: Starfleet Command|