LP-0B became operational in 1999, and was subsequently upgraded in 2003 with the construction of a mobile service tower, which was completed in 2004.
It is active, and is currently used by Minotaur rockets.
The first launch from LP-0B was of a Minotaur I in December 2006, and was the first launch from the Mid-Atlantic Regional Spaceport.

On October 19, 2017, the now-defunct Vector Space Systems announced plans to conduct three launches from pad 0B with its in-development Vector-R small satellite launch vehicle over the subsequent two years, with an option for 5 additional launches.
LP-0B became operational in 1999, and was subsequently upgraded in 2003 with the construction of a mobile service tower, which was completed in 2004. It is active, and is currently used by Minotaur rockets. The first launch from LP-0B was of a Minotaur I in December 2006, and was the first launch from the Mid-Atlantic Regional Spaceport. 
On October 19, 2017, the now-defunct Vector Space Systems announced plans to conduct three launches from pad 0B with its in-development Vector-R small satellite launch vehicle over the subsequent two years, with an option for 5 additional launches.
Mid-Atlantic Regional Spaceport Launch Pad 0