Bowers Quarry is an active stone quarry located on the Isle of Portland, Dorset, England. It is located on the western side of Portland, where it lies west of the villages Weston and Easton. The quarry is operated by Albion Stone and became the site of the first Portland Stone mine. In October 2002 the firm successfully initiated Portland's first ever underground mining operation, which was a precursor to Jordans Mine, which would start in 2008. It has also been the selected site for the planned Mass Extinction Memorial Observatory.