The Dilithium Mine features both indoor and outdoor environments and is accessible through the Beta Ursae Block or through an unlockable transwarp. If you play Star Trek Online, those are probably words that make sense to you. The mine's appearance will change as fleet members upgrade its facilities by following its three progression tracks.
Completing the main progression track for the Dilithium Mine will reward fleets with discounts on project dilithium input costs, new construction projects, daily missions, and a daily repeatable that allows fleet members to refine ore beyond their normal cap. The sub tracks offer a variety of bonuses, mostly related to discounts on fleet projects.
Fleets will have access to the Dilithium Mine the moment it goes live but will need to reach the first tier of its main track before being granted access to the physical space.