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Silver

Samson Mine Reversible Waterwheel & Man Engine
Society: ASMEMain Category: MechanicalSub Category: Minerals Extraction & RefiningEra: 1800-1829DateCreated: 1824Samson PitSankt AndreasbergState: Lower SaxonyCountry: GermanyWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/minerals-extraction-and-refining/-118-samson-mine-reversible-waterwheel---man-engin, https://www.asme.org/getmedia/ee57310a-3df7-4e67-8ed6-d54357184890/118_Samson_Mine_Reversible_Waterwheel_Man_Engin.aspx

This silver mine preserves two features of bygone practice. One is the reversible waterwheel of the ore-hoist, which originally was installed in 1565 and currently dates back to 1824. The present wheel is 9 meters in diameter and reaches a depth of 700 meters.

YearAdded:
1987
Image Credit: Public Domain (Author's Choice)Image Caption: Samson Mine Reversible Waterwheel & Man EngineEra_date_from: 1824
Marlette Lake Water System
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 1870-1879DateCreated: 1873-1887Lake Tahoe–Nevada State ParkCarson CityState: NVZip: 89703Country: USAWebsite: http://www.asce.org/Project/Marlette-Lake-Water-System/Creator: Schussler, Hermann

In the mid-1800s Virginia City was America's greatest producer of high-grade silver and gold ore. When mining activities began, natural springs provided water to the camps. As the population grew, the Virginia and Gold Hill Water Company was formed to address the need for more water. The company first drew water from tunnels that had been driven into the mountains by prospectors. Water was stored in wooden tanks and sent through pipes into the town. 

YearAdded:
1975
Image Credit: Courtesy Flickr/Jeff Moser (CC BY-ND 2.0)Image Caption: Marlette Lake Water SystemEra_date_from: 1873
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