Photo #7351 - Tunnel Boring Machine breaking through a mountain face to finish Arrowhead Tunnel Project

Photo #7350 - Tunnel Boring Machine breaking through a mountain face to finish Arrowhead Tunnel Project

Photo #7352 - Tunnel Boring Machine breaking through a mountain face to finish Arrowhead Tunnel Project

Photo #7353 - Tunnel Boring Machine breaking through a mountain face to finish Arrowhead Tunnel Project

Photo #7354 - Tunnel Boring Machine breaking through a mountain face to finish Arrowhead Tunnel Project

Photo #7355 - Tunnel Boring Machine breaking through a mountain face to finish Arrowhead Tunnel Project