California: Chas E. Uren, C.E., . Very Good. First Edition. [15x10.5in Neatline, 16.5x12in sheet]; Laid flat Plat map on light bisque paper of Jackson Mining District in Amador County, California, very detailed with ownership, roads, mining buildings, equipment and facilities, reservoirs, mine shafts and tunnels; Fold creases, a few small chips and closed tears along edges, light glue residue on verso where attached to hinge on court document, several light pencil marks, and Royal Bond watermark, copy of the US Supreme Court ruling is included with historical notes on the mines. A very good copy with no soiling or fading. Item #13806
This plat map is detailed with the typical section lines for a Mining District Map (T.6N. R.11 E. M.D.M.). In addition, it is very detailed with notes on the disputed boundaries subject to the suit before the United States Supreme Court. The disputed involved ore or gold-bearing rock taken in a lateral mine shaft by Kennedy from ground belonging to Argonaut (owner of the Pioneer Gold & Silver Mining Co. claim). The US Supreme Court affirmed the State and lower courts' rulings in favor of Argonaut and forcing Kennedy to cease operations in the lateral shaft and make reparations to Argonaut.
The Pioneer Mine was discovered in 1850 by William Tudor and James Hager, freed slaves, that worked the mine into the 1860's. They sold their claim to the Pioneer Gold & Silver Mining Company which was acquired by Argonaut Mining Company in 1893. The mine was very productive to the mid 1940's. In 1922, there was a mine fire 3,500 feet below ground that killed 48 immigrant miners.
The Kennedy Mine was discovered in 1856 by Andrew Kennedy. The site included a mill and the deepest mining shaft of 5,912 feet during 86 years of operations to 1942. The Kennedy site with building and equipment ruins is a park and preserve open to the public for tours and classes.