On 03/24/2013 10:44 AM, dsimonhon3 wrote:
> I began building the Builders In Scale "The Ore Bin" and the framework is done.
> When i placed my Blackstone high side gondola in front of it,the bin seems a little
> The bin measures 25 ft. long by 25 ft high by 10 ft. deep.
> I searched for some ore bin pics with gondolas to compare,but no luck.
The size suggests these are the overall dimension, with the actual ore bin about
8' wide by 12' deep inside. This gives about 64 sq' section area by 23' for
1472 cu' level full. Say about 147,200 lbs or 74 tons at at a nominal
100lbs/cu'. That gives you three car loads, since gondolas were normally sized
for coal at about 55lb/cu', so you can't fill one much more than 1/2 high
without overloading it.
Is this compatible with your mine's planned output and the railroad's car
handling schedule? An ore bin is essentially a surge tank, taking a fairly
steady output per mining shift, and holding it until cars can be shifted in,
loaded and cleared out. Depending on car availability, and frequency of railroad
service, your mine may need a couple days to a week or more of storage capacity.
If those bins fill up, mining either ceases or you have to stockpile on the
ground, at extra cost for the handling. Neither is good for company
For photo resources, try to borrow a copy of Myrick's RRs of Arizona V-3, on the
Clifton-Morenci copper district and its railroads. This shows quite a few
examples of ore bins. The Logging & Mining Annual(name?) of a few years back
has a long and very well illustrated article, by Mallory Hope Farrel, on that
district's Coronado RR, originally 20" gauge and later mixed 20" and 36" gauges
This has many ore bin photos from the several transfer points and mine
inclines. Circa 1910 the 20" gauge Longfellow Incline's bins ran about 300'
along the 36" gauge Coronado line, but I suspect much of this capacity was
provided to keep ore from several sources separate.
I believe that there were also extensive ore bins on the mining branches east of
Leadville, but am not familiar with area. Sundance may have covered this
district in one of their "Trails among the Columbine'. The San Juan area mines
tended to place mills/concentraters at the closest water supply, and feed them
with aerial trams, eliminating the railroad transfer. Same for the districts
west of Boulder, where circa 1900 the C&NW bought actual ore hoppers (see the
Trout Creek kit) but soon sold them off for lack of traffic. The Leadville
branches moved ore from the ridgetop mines down to the riverside mills. The
Cliffton-Morenci district ore roads, the Coronado and the Shannon, were mining
company lines moving ore from the mines above Chase Creek canyon, 5 to 12 miles
down to the smelters located at the SG railhead along the San Francisco River.
If you have a good engineering university nearby, with a library that has kept
their older texts available, you may be able to find circa 1900-1930 books on
mining plant that illustrate ore bins.