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Film transparency of postcard showing a boat transporting gold ore on Lake Mead, circa late 1930s

Date

1935 to 1939

Archival Collection

Description

An image of a mining building and a boat on Lake Mead. Gold ore claims were made near the northern shores of Lake Mead in the late 1930s, after the completion of Hoover Dam. Shipments of ore were towed down Lake Mead by barge for railroad transport. Text on bottom of image reads: "First load of gold ore to be transported on Boulder Lake by barge." Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Image

Film transparency of a postcard showing a boat transporting gold ore on Lake Mead, circa late 1930s

Date

1935 to 1939

Archival Collection

Description

An image of a mining building and a boat on Lake Mead. Gold ore claims were made near the northern shores of Lake Mead in the late 1930s, after the completion of Hoover Dam. Shipments of ore were towed down Lake Mead by barge for railroad transport. Text on bottom of image reads: "First load of gold ore to be transported on Boulder Lake by barge." Note: Boulder Dam was officially renamed Hoover Dam in 1947.

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Correspondence, Levi Syphus to Willard George

Date

1940-05-20

Archival Collection

Description

This folder is from the "Correspondence" file of the Sadie and Hampton George Papers (MS-00434)

Text

Slide of the old stamp mill, circa 1950s

Date

1950 to 1959

Description

The old stamp mill, location unknown. A stamp mill (or stamp battery or stamping mill) is a type of mill machine that crushes material by pounding rather than grinding, either for further processing or for extraction of metallic ores. Breaking material down is a type of unit operation. A stamp mill consists of a set of heavy steel (iron-shod wood in some cases) stamps, loosely held vertically in a frame, in which the stamps can slide up and down. They are lifted by cams on a horizontal rotating shaft. On modern mills, the cam is arranged to lift the stamp from the side, so that it causes the stamp to rotate. This evens the wear on the shoe at the foot of the stamp. As the cam moves from under the stamp, the stamp falls onto the ore below, crushing the rock, and the lifting process is repeated at the next pass of the cam. Each one frame and stamp set is sometimes called a "battery" or, confusingly, a "stamp" and mills are sometimes categorized by how many stamps they have, i.e. a "10 stamp mill" has 10 sets. They usually are arranged linearly, but when a mill is enlarged, a new line of them may be constructed rather than extending the line. Abandoned mill sites (as documented by industrial archaeologists) will usually have linear rows of foundation sets as their most prominent visible feature as the overall apparatus can exceed 20 feet in height, requiring large foundations. Stamps are usually arranged in sets of five. Some ore processing applications used large quantities of water so some stamp mills are located near natural or artificial bodies of water. For example, the Redridge Steel Dam was built to supply stamp mills with process water.

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Correspondence, Levi Syphus to Sadie George

Date

1910-10

Archival Collection

Description

This folder is from the "Correspondence" file of the Sadie and Hampton George Papers (MS-00434)

Text

Report from U.S. Geological Survey on pottery

Date

1912

Archival Collection

Description

This folder is from "Maps and Assorted Documents" file of the Sadie and Hampton George Papers (MS-00434)

Text

Correspondence, Levi Syphus to Mr. A. E. Green and Mr. David Naylor Jr.

Date

1926-02-11

Archival Collection

Description

This folder is from the "Correspondence" file of the Sadie and Hampton George Papers (MS-00434)

Text

Correspondence, Thomas Toland to F.A. Truett; Thomas Toland to Levi Syphus

Date

1917-05-18

Archival Collection

Description

This folder is from the "Correspondence" file of the Sadie and Hampton George Papers (MS-00434)

Text

Correspondence, Thomas Toland to Sadie George

Date

1917-05-21

Archival Collection

Description

This folder is from the "Correspondence" file of the Sadie and Hampton George Papers (MS-00434)

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Correspondence, Levi Syphus to Sadie George

Date

1916-01 to 1916-02

Archival Collection

Description

This folder is from the "Correspondence" file of the Sadie and Hampton George Papers (MS-00434)

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