Editing Vandenberg Space Force Base (section)

===== Delta IV =====
After the end of the shuttle program at Vandenberg in 1989, SLC-6 was reconfigured in 1999 to support polar-orbit satellite launches by the new [[Delta IV]] family of launch vehicles, utilizing a Common Core Booster for all its class sizes including the [[Delta IV rocket|Delta IV (Heavy)]] launcher. After the reconfiguration, the {{cvt|132|acre|ha}} launch site included structures similar to those at the Delta IV launch site at [[Cape Canaveral Space Launch Complex 37]] (SLC-37B) in Florida, with a Fixed Umbilical Tower, Mobile Service Tower, Fixed Pad Erector, Launch Control Center and Operations Building, and a [[Horizontal Integration Facility]]. SLC-6 also featured a Mobile Assembly Shelter that protects the rocket from adverse weather.

The first of the Delta IV launch vehicles to fly from SLC-6 successfully lifted off at 20:33 PDT on 27 June 2006 when a Delta IV Medium+ (4,2) rocket lofted NROL-22, a classified satellite for the [[National Reconnaissance Office]], into orbit. The payload was successfully deployed approximately 54 minutes later.<ref>{{Cite web|url=https://www.nasaspaceflight.com/2006/06/delta-iv-nrol-22-launch-success/|title=Delta IV - NROL-22 launch success|first=Chris|last=Bergin|date=27 June 2006|access-date=14 September 2023}}</ref> ten Delta IVs were launched from SLC-6, with the last launching in 2022 before the site was relinquished to SpaceX.