Ennis, Montana


  • 3″ R Prospector Hammer System on a Vermeer D24x40
  • 200 psi (13 bar) x 650 cfm air compressor

Job Description:

  • All cobble

Bore was only 200-ft (60 m) in length, but the ground conditions were all cobble – as seen in the entry pit photo. Bore was completed in 4 hours.