
The gold-bearing quartz veins of the Sierra Nevada foothills define the landscape of this 1880s survey, where the concentrated mining operations around Nevada City and Grass Valley are meticulously documented. Famous lode mines like the Empire Mine and Idaho Mine stand as primary industrial hubs near the eastern edge of the sheet, connected to the wider world by the Nevada Co. Narrow Gauge R.R. To the west, the landscape transitions into ranch lands and earlier hydraulic mining sites, evidenced by settlements like Smartsville and the appropriately named Condemned Bar along the Yuba River.
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