By Robert A. Trennert
Driving the excessive twine is the 1st entire historical past of aerial mine tramways within the American West, describing their position within the evolution of mining after 1870. Robert A. Trennert exhibits how the mid-nineteenth century improvement of cord rope production made it attainable for American marketers reminiscent of Andrew S. Hallidie and Charles Huson to start erecting single-rope tramways within the 1870s and Eighteen Eighties. Their innovations have been via the extra monstrous double-rope platforms imported from Europe. by means of the flip of the century, aerial tramways have been universal all through western mining areas, hauling every little thing from gold and silver ore to coal and salt and altering the face of the undefined. Aerial mine tramways proved to have a unique fascination; humans frequently rode them for a thrill, occasionally with disastrous effects. They have been additionally very temperamental, wanted consistent consciousness, and have been at risk of injuries. The years among 1900 and 1920 observed the operation of a few of the west’s such a lot remarkable tramways, however the decline in high-country mining starting within the 1920s--coupled with the advance of extra effective technique of transportation--made this expertise all yet out of date by means of the tip of the second one global conflict. Historians and the final reader might be both enthralled by means of Trennert’s attention-grabbing tale of the increase and fall of aerial mine tramways.
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Extra resources for Riding the High Wire: Aerial Mine Tramways in the West
M. Clement wrote company president John Hays Hammond to express his frustration. ” Clement believed that the tramway could be made acceptable, but only with radical changes, including replacing all the carriers. 10 Trenton officials, apparently stung by the complaints, agreed in the spring of 1892 to make major changes in the Bunker Hill tramway at their own expense. ” When the repairs 36 BLEICHERT’ S D OUBLE-ROPE SYSTEM were completed, the 9,000-foot line featured two intermediate tension stations to offer additional support as it passed over the crest of the mountains.
Similar other tramways were located along the route of the Rio Grande Southern. As soon as the railroad reached San Bernardo in 1891, for example, a mill and tramway were built. Much the same occurred at the Suffolk Mine at Ophir. 37 The California Wire Works, of course, did not sit idly by while the competition built tramways. During the 1890s, Hallidie and his engineers redesigned the grip pulley and invented a new type of clip for attaching buckets to the cable. The original clip, which used a strap to secure it to the cable, had to be replaced every five months or so.
Both Hallidie’s California Wire Works and C. W. Badgley (Huson system) offered examples of the singlerope system, each touting its specific features. Even more interesting, J. ” Using the designs of Theodore Otto, Adolf Bleichert’s former partner, Pohlig’s double-rope tramway in the Transportation Building was nearly identical to the Trenton offering. 16 38 BLEICHERT’ S D OUBLE-ROPE SYSTEM The discharge terminal of Trenton’s exhibition tramway at Chicago’s World Fair in 1893 as depicted in the company’s 1896 catalog.
Riding the High Wire: Aerial Mine Tramways in the West by Robert A. Trennert