The Queen's Medical Center filed formal documents Thursday to buy Hawaii Medical Center West and restore emergency medical service to Leeward Oahu residents.

Queen's plans to invest a little more than $73 million.  $21 million would go to buying HMC West from St. Francis Healthcare.  The rest would pay for construction projects, buying equipment and moving costs.

HMC shut down both its East and West campuses last December.

Queen's hopes to have the HMC West facility up and running again sometime next year.