Up in the Colorado mountains there is a mine that requires a place to store black powder for blasting. It is on the dual-gauge, HO and HOn3 Denver and Rio Grande Western layout of Kent Courtney. Doctor Ben's Weathering Stain Set enabled the realism of this casting. Here it is being measured for its final placement about six feet from the floor. — at Monarch Mountain.Up in the Colorado mountains there is a mine that requires a place to store black powder for blasting. It is on the dual-gauge, HO and HOn3 Denver and Rio Grande Western layout of Kent Courtney. Doctor Ben's Weathering Stain Set enabled the realism of this casting. Here it is being measured for its final placement about six feet from the floor. — at Monarch Mountain.