File:Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels - NARA - 293688.tif
Original file (2,081 × 3,000 pixels, file size: 5.95 MB, MIME type: image/tiff)
Captions
Summary
[edit]Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels ( ) | |||||||||||||||||||||||||||
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Author |
Unknown authorUnknown author or not provided |
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Record creator InfoField | Department of the Interior. Bureau of Reclamation. Engineering and Research Center. (05/18/1981 - 03/04/1988) | ||||||||||||||||||||||||||
Title |
Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels |
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Description |
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Date |
30 June 1932 date QS:P571,+1932-06-30T00:00:00Z/11 |
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Collection |
institution QS:P195,Q518155 NARA's Rocky Mountain Region (Denver) (NRGA), Building 48, Denver Federal Center, West 6th Avenue and Kipling Street, Denver, CO, 80225-0307. |
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Record ID InfoField |
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Source | U.S. National Archives and Records Administration | ||||||||||||||||||||||||||
Other versions |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:57, 19 September 2011 | 2,081 × 3,000 (5.95 MB) | US National Archives bot (talk | contribs) | == {{int:filedesc}} == {{NARA-image-full |Title=Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels |Scope and content=Photograph from Volume Two of a series of photo albums documenting the construction of Hoover Dam, |
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Image title | Portrait |
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Author | NARA |
Width | 2,081 px |
Height | 3,000 px |
Bits per component | 8 |
Compression scheme | Uncompressed |
Pixel composition | Black and white (Black is 0) |
Image data location | 281 |
Number of components | 1 |
Number of rows per strip | 3,000 |
Bytes per compressed strip | 6,243,000 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
File change date and time | 10:35, 4 December 1998 |
Structured data
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image/tiff
Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels (English)
Photograph from Volume Two of a series of photo albums documenting the construction of Hoover Dam, Boulder City, Nevada. Full caption of photo reads: "Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels. Concrete is hauled by truck in dump-buckets into position under carriage, hoisted to upper deck by bridge crane operating over head, dumped into hoppers and compelled into forms by compressed air through two 8-inch steel and rubber pipes. Two gun units are operated, one from either side of deck. The entire assembly consists of three major units: the concrete gun carriage seen in the photograph, a traveler carriage used to support the compressed air pipes between the gun carriage and the form and the form carriage itself. All three units operate over rails placed on tunnel alignment. The form carriage is given flexibility for curve construction through a system of gores and wedges. See also following photographs." (English)
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- Template Unknown (author)
- US National Archives location: other
- Images from the National Archives and Records Administration
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- US National Archives series: Photograph albums, compiled 1903 - 1972
- Media contributed by the National Archives and Records Administration
- CC-PD-Mark
- PD US Government