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Historical map overlays

USGS scanned historical topographic maps. Enable an overlay and adjust its opacity. Works in 2D and 3D.

Sun azimuth: 315°   Sun altitude: 45°   Z factor: 1   Lidar opacity: 1
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By Tom Ashworth — HUMBOLDT COUNTY, CALIFORNIA County

Gold Mining Site CA • HUMBOLDT COUNTY, CALIFORNIA County County
Description
LOCATION COUNTY: Humboldt County STATE: California Gold is the principal mineral resource of Humboldt County, primarily from placers along the Klamath and Trinity rivers. The total production through 1959 was 131,300 ounces. There are six lode gold mines shown on U. S. Forest Service quadrangles.
Historical Notes
Source: Tom Ashworth's Prospectors Cache (tomashworth.com / Tom Ashworth). Author: Tom Ashworth. Original page: humboldt_ca.shtml. Area: by Tom Ashworth. Map coordinates refined from text (landmark: "Tom, HUMBOLDT COUNTY, CALIFORNIA County, California, USA"). Still approximate — verify on the ground. LOCATION COUNTY: Humboldt County STATE: California Gold is the principal mineral resource of Humboldt County, primarily from placers along the Klamath and Trinity rivers. The total production through 1959 was 131,300 ounces. There are six lode gold mines shown on U. S. Forest Service quadrangles.
Status / Verification historical_site — Legendary or approximate

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