Blanchard Springs Caverns (BSC) Dripstone and Discovery Trail Infrastructure repairs and safety upgrades. Work includes but is not limited to structural stabilization of tunnel entrance and exits, disposal and removal of existing supports, masonry repairs, Installation of Instrumentation & monitoring equipment, replacement of existing air lock doors at entrance and exits, replacement of existing security doors at entrance and exits, replacement of existing suspended ceiling system, components, and associated ductwork, replacement of existing bypass tunnel door, replacement of existing lighting and distribution system components, replacement of existing safety handrails, and replacement of the existing mine phone system and components.