| | Thumbnail | | Creator | Date | Title / Author / Date / Location | Price | | | Description |
| 8123 |  | Details | Vincent, H.S. | 1901 |
| Black Hills Copper Company Mine Workings, Deadwood, South Dakota |
|
Vincent, H.S. |
|
| 1901 |
| LOC:90 |
| $200.00 | Vincent--H-S- | Black-Hills-Copper-Company-Mine-Workings--Deadwood--South-Dakota | Original mining engineering blueprint dated May 1901, showing the workings of the Black Hills Copper Company at Deadwood, South Dakota. A plan and accompanying section record the arrangement of underground workings and their relationship to the surface and mineral vein. Shafts, branching passages, survey bearings, and geological features are shown at a scale of 1 inch to 100 feet.
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Prepared during the development of mining in the Black Hills, the drawing documents the practical surveying and engineering work behind copper exploration in a district better known for gold. The blueprint bears the credit of H. S. Vincent, U.S. Deputy Mineral Surveyor, Denver, Colorado. |