Photograph as originally submitted to this page in the Historical Marker Database www.HMdb.org. Click on photo to resize in browser. Scroll down to see metadata.

Photographer: Syd Whittle
Taken: June 27, 2011
Caption: Serpentine Core
Additional Description: Plaque Reads:
60 Inch
Serpentine Core
Experimental Bored Shaft
Depth 1125 feet
Idaho-Maryland Mine
Grass Valley
Submitted: July 8, 2011, by Syd Whittle of Mesa, Arizona.
Database Locator Identification Number: p161123
File Size: 4.029 Megabytes

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