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Gold prospector pouring water through his rocker box, Pinos Altos, New Mexico (1940). Rocker box exhibit at Dahlonega Gold Museum. A rocker box (also known as a cradle or a big box) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century.
The Gould Street Generating Station was a former 100 MW electric generating plant operated by Exelon that was located on Gould Street in south Baltimore, Maryland, USA. The plant was adjacent to an elevated section of freeway I-95 and was south of the Riverside neighborhood and west of the Locust Point neighborhood of Baltimore.
The largest gold-mining district in California is the famous Mother Lode of the Sierra Nevada. Found in the early 1850s, the lode is a zone one to four miles wide and running 120 miles northwest–southeast from El Dorado County in the north, through Amador, Calaveras, and Tuolumne counties, to Mariposa County in the south.
Panning for gold was the simplest method of recovering gold, but mostly used for prospecting since it was slow. A faster way was by a rocker box or by sluicing. Dirt was filled into the box or sluice together with water and rocking movements or gravity would make the gold particle go to the bottom whereas sand and fine gold particles would flow ...
Currently, yearly gold mining produces 2% of the existing above-ground gold which is 158,000 tonnes (as of 2006). [119] In 2008, gold mining produced 2,400 tonnes of gold, official gold sales close to 300 tonnes, and dehedging (physical delivery of metal sold months before by mining companies on terminal markets) close to 500 tonnes. [120]
Location of Montgomery County in Maryland. This is a list of the National Register of Historic Places listings in Montgomery County, Maryland.. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Montgomery County, Maryland, United States.