▁of ▁all ▁of ▁Mar ble ▁Arch ▁C aves , ▁including ▁the ▁newly ▁discovered ▁sections . ▁During ▁this ▁time , ▁survey ors ▁learned ▁of ▁the ▁death s ▁of ▁F rak es , ▁Og den ▁and ▁Col in ▁V ick ers — another ▁of ▁the ▁divers ▁in ▁the ▁original ▁team — in ▁the ▁M oss dale ▁Ca ver ns ▁accident . ▁In ▁t ribute , ▁a ▁number ▁of ▁cave ▁features ▁in ▁Sk reen ▁Hill ▁ 3 ▁were ▁named ▁after ▁the ▁three ▁ca vers . ▁▁ 1 9 8 2 – 1 9 8 5 : ▁show ▁cave ▁development ▁From ▁ 1 9 8 2 ▁until ▁after ▁opening ▁in ▁ 1 9 8 5 , ▁sections ▁of ▁Mar ble ▁Arch ▁C ave ▁under w ent ▁development ▁to ▁improve ▁access ibility ▁in ▁order ▁to ▁accept ▁tour ist ▁visitors . ▁As ▁well ▁as ▁concrete ▁path ways , ▁safety ▁bar riers ▁and ▁electric ▁light ing , ▁this ▁involved ▁installing ▁we irs ▁and ▁j ett ies ▁for ▁boat ▁access ▁to ▁enable ▁visitors ▁to ▁enter ▁the ▁c aves ▁by ▁the ▁same ▁route ▁that ▁Mart el ▁and ▁the ▁early ▁expl or ers ▁took . ▁▁ ▁The ▁development ▁also ▁included ▁b oring ▁a ▁new ▁entrance ▁sh aft ▁into ▁Screen ▁Hill ▁and , ▁significantly , ▁bl ast ing ▁a ▁cor rid or ▁through ▁the ▁short ▁section ▁of ▁rock ▁separ ating ▁Pool ▁Chamber ▁from ▁New ▁Chamber . ▁This ▁connected ▁Screen ▁Hill ▁all ▁the ▁way ▁to ▁The ▁J unction ▁for ▁walking ▁visitors ▁for ▁the ▁first ▁time . ▁▁ ▁At ▁this ▁time , ▁all ▁known ▁ent ran