Utopia Planitia started as Utopia Colony, a Human settlement which grew out of early colonization efforts started before 2069. By 2153, the colony had grown to include a hospital and a large weapons array used to deflect asteroids as part of a terraforming project.
Utopia Planitia Fleet Yards
Located in geosynchronous orbit over Utopia Planitia itself, the Fleet Yards are the Solar System's largest ship-building facility and the site of Starfleet's high-profile starship design projects. The Yards consist of various space stations and drydocks in a variety of sizes, as well as surface-based factories.