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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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Patterson — Benton County

Gold Mining Site WA • Benton County County
Description
On Blalock Island, in the Columbia River, is the location of the Blalock Island Placer Mine. It was 3 separate operations. Also the Gone Busted Placer is 2 operation, with dry wash plant, operated from 1938-1940 for placer gold.
Historical Notes
Source: Tom Ashworth's Prospectors Cache (tomashworth.com / Mike Higbee / 49erMike). Author: Tom Ashworth. Original page: benton_wa.shtml. State index: https://web.archive.org/web/20040830075749/http://www.tomashworth.com/goldloc.shtml Area: Patterson. Map coordinates are an approximate county centroid — not a precise claim site. On Blalock Island, in the Columbia River, is the location of the Blalock Island Placer Mine. It was 3 separate operations. Also the Gone Busted Placer is 2 operation, with dry wash plant, operated from 1938-1940 for placer gold.
Status / Verification historical_site — Legendary or approximate

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