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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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Alderdale — BENTON County

Gold Mining Site WA • BENTON County County
Description
East of Alderdale by 4 miles, in a deserted channel of the Columbia River, covering several miles, is the Artesian Coulee Placer in section 6, T4N, R24E. It was productive for a number of years.
Historical Notes
Source: Tom Ashworth's Prospectors Cache (tomashworth.com / Tom Ashworth). Author: Tom Ashworth. Original page: benton_wa.shtml. Area: Alderdale. Map coordinates refined from text (area: "Alderdale, BENTON County, Washington, USA"). Still approximate — verify on the ground. East of Alderdale by 4 miles, in a deserted channel of the Columbia River, covering several miles, is the Artesian Coulee Placer in section 6, T4N, R24E. It was productive for a number of years.
Status / Verification historical_site — Legendary or approximate

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