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: Dawn Bowen
Taken: June 20, 2007
Caption: Rocker Shovel Loader
Additional Description: Invented in 1938, this machine was called "The first successful device to replace human labor" in narrow, confined tunnels in underground hard-rock mines. Operating by compressed air, the bucket scooped up the ore and waste rock that resulted from blasting. THe bucket was lifted overhead and dumped the material into a mine rail car, which hauled the rock from the mine. About 29,000 of these machines, manufactured by EIMCO in Salt Lake City, were sold throughout the world.
Submitted: June 26, 2007, by Dawn Bowen of Fredericksburg, Virginia.
Database Locator Identification Number: p3819
File Size: 2.706 Megabytes

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