Frogger Plugs a Mineshaft Look both ways, people. Similar Images ...based on the tags: arcade-games, headframes, how-did-this-get-here, left-behind... Looking at the concrete headframe from street level. Acros 100 in Pentax 67 Looking to the chapel addition from the Chateau. This rockhouse was added below the shaft to load Gilpin Tram cars. Frontenac, as seen from the Missouri Flats area. On the National Mine property are two shafts, both serving the same workings. This one seems to have gotten some upgrades in the 1960s, judging from the condition of the metal. More than half a century of plans rot in the shadows, seemingly useless. Mammoth Mine overlooks Central City from atop Mammoth Hill. In the distance you can make out Coeur d’Alene Mine (red), which operated from 1885 through 1940. Wind-battered catwalk lights between the shaft house and headframe/rockhouse building. A wooden mold sitting outside of the foundry.