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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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Summit County Gold Panning

Gold Mining Site CO • Summit County County
Description
Ranking first in Colorado for placer gold production and tenth for lode gold, Summit County produced an estimated minimum of 739,511 ounces from placer mines and 271,159 ounces from lode mines through 1959. The area near the northern county line, along Route 9 you will find the Big Four Mine, which is 16 miles south of Kremmling in Grand County, area lead-zinc mines produced a by-product gold.
Historical Notes
Source: Gold Fever Prospecting — Colorado Gold Panning Locations. Compiled by Tom Ashworth (Prospectors Cache / goldfeverprospecting.com). Documented placer gold or recreational panning area. Map coordinates are approximate (county centroid or geocoded place name). Verify claim status, private land, and current regulations before prospecting. Ranking first in Colorado for placer gold production and tenth for lode gold, Summit County produced an estimated minimum of 739,511 ounces from placer mines and 271,159 ounces from lode mines through 1959. The area near the northern county line, along Route 9 you will find the Big Four Mine, which is 16 miles south of Kremmling in Grand County, area lead-zinc mines produced a by-product gold.
Status / Verification historical_site — Legendary or approximate

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