
Pliocene Ridge serves as the high spine of this territory within the Tahoe National Forest, separating the drainages of Oregon Creek to the north from the Middle Yuba River to the south. The landscape is defined by its deep mining heritage, evident in the numerous sites scattered across the terrain. From the Alaska Mine and True Grit Mine to the Kate Hardy Mine near Kanaka Creek, the map documents an extensive industrial history of extraction.
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This is the sole edition of this map. No revisions or reprints were ever made.
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