The Fireglow Mine is an abandoned gold mine consisting of several adit openings, however all but two have since caved. The mine was started in the 1910s w/ workings done up until the late 1930s. This is the more significant mine, consisting of the main level that hosts an impressive stope leading diagonally high up into darkness. Here one can see the entrance, ore cart tracks, an aged ore chute, & a y-split in the tracks as this was where the miners were following the quartz vein, which is prominently visible throughout the mine including by the flooded incline shaft. Both directions following the stope don't go more than 150 feet, however one can see more old ore chute & rotting ladders leading up into the upper workings. The wood beams still stand despite being water worn to the point that they are becoming gooey. Look down to see a stairwell leading to significant workings of the lower level; the winze has been flooded to the brim in crystal green water for the past 80 years, giving it an eerie appearance. Combine that with the talking chatter of loud dripping water soaking you wet throughout the mine & its a great place to send shivers up the spine. Another visible flooded stope opening nearby reveals the mine to be significantly larger to an unknown depth.
A few mining terms:
Adit - A horizontal passage leading into the mine, not to be confused w/ a "tunnel", which would have an opening out the other side. Adits are sloped slightly upwards to allow for drainage of groundwater.
Crosscut - A horizontal opening that does not run along the vein. Typically a shaft will lead to crosscuts at each level that give access to drifts along the vein. Crosscuts typically run straight as an arrow through worthless rock.
Drift - A horizontal opening that runs along the vein. Typically there are many ore chutes from stopes above, and the drift will wander to follow the vein.
Level - If you follow a ladder down a shaft, you will arrive at horizontal workings every 100 feet or so, and these are called levels. The levels have a station near the shaft, and are named by the distance down the shaft.
Manway - Any kind of passage with a ladder in it could be called a manway. Shafts are divided into "compartments" and one of these is very often a manway. Sometimes the manway of a shaft is crowded with pipes and cables and such.
Ore chute - A "spout" built of wood used to load broken rock from above into waiting ore bins.
Raise - A raise is like a shaft that starts undergound and goes upwards. Typically a ladder next to an ore chute along a drift goes up a raise and gives access to a stope above.
Square set stoping (timbering) - The most expensive mode of underground mining. As ore is removed in a stope, it is replaced by a 10x10 foot lattice of 12x12 timbers. The ground was unstable here & the lattice helps protect from potential collapses. Many times the sets are backfilled with broken rock to help support the stope.
Stope - An excavation underground that actually removed whatever it was they were after. These are typically irregular in shape as they follow the ore whereever it goes. If the vein is wide and/or the rock is poor, the challenge in mining is to keep the rock supported while extracting the material in the stope.
Winze - A winze is like a vertical or inclined shaft that starts underground & connects one level down to another.
Source: Mining Terms: http://cholla.mmto.org/mines/terms.html
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