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Historic American Buildings Survey,
Engineering Record, Landscapes Survey
Arrowrock Dam, Spillway, Boise River, 22 miles upstream east of Boise, Twin Springs, Boise County, ID
- Title: Arrowrock Dam, Spillway, Boise River, 22 miles upstream east of Boise, Twin Springs, Boise County, ID
- Creator(s): Historic American Engineering Record, creator
- Related Names:
United States Reclamation Service
Davis, A. P.
Dearborn Chemical Company
T.E. Connelly, Incorporated
Case Construction Company
Gardner, Denis , historian
Doncaster, Kelsey J. , historian
Smith, Brent F. , photographer
Fraser, Clayton B. , photographer
Strough, Kirsten , photographer
U.S. Bureau of Reclamation , sponsor - Date Created/Published: Documentation compiled after 1968
- Medium:
Photo(s): 17
Data Page(s): 7
Photo Caption Page(s): 2 - Reproduction Number: ---
- Rights Advisory:
No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. (http://www.loc.gov/rr/print/res/114_habs.html)
- Call Number: HAER ID-27-A
- Repository: Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
- Notes:
- Significance: Arrowrock Dam is a key component of the Boise Project, an irrigation project designed by the United States Reclamation Service to irrigate roughly 390,000 acres in the Boise and Payette Valleys in southwestern Idaho. This project helped to make the Boise and Payette Valleys the most agriculturally productive region in Idaho. In large measure this was due to Arrowrock Dam on the Boise River, a dam that created a reservoir of more than 272,200 acre-feet of water for irrigation. Arrowrock Dam was the highest dam in the world when it was completed in 1915, measuring 350.5 feet high from bedrock. Experimental elements of its gravity-arch design would be applied to later dams that were even higher. It was only one of two Reclamation dams built with sand cement for the concrete. It was the first USRS dam built whose design required Ensign valves for its outlets to release water. Ensign valves were an important step in the rapid evolution of water regulating valves triggered by the construction of ever higher dams at the beginning of the twentieth century. The reinforced-concrete spillway at the Arrowrock site is a key appendage of Arrowrock Dam. The spillway serves as an overflow during periods of high water, directing flow around the dam and thus preventing reservoir spillage over the dam's crest. Moreover, the spillway operates in conjunction with the needle valves, helping to regulate the amount of water moving from the reservoir into the Boise River below the dam. The spillway's weir is equipped with movable drum gates, a unique feature that allows operators to impound water within the reservoir. When the drum gates are raised the capacity of the reservoir increases by about 15,000 acre-feet.
- Survey number: HAER ID-27-A
- Building/structure dates: 1911-1915 Initial Construction
- Building/structure dates: 1935-1937 Subsequent Work
- Building/structure dates: 1994 Subsequent Work
- National Register of Historic Places NRIS Number: 72000437
- Subjects:
- Place:
- Latitude/Longitude: 43.59511, -115.92080479113433
- Collections:
- Part of: Historic American Engineering Record (Library of Congress)
- Bookmark This Record:
https://www.loc.gov/pictures/item/id0507/
The Library of Congress generally does not own rights to material in its collections and, therefore, cannot grant or deny permission to publish or otherwise distribute the material. For further rights information, see "Rights Information" below and the Rights and Restrictions Information page ( https://www.loc.gov/rr/print/res/rights.html ).
- Rights Advisory: No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. http://www.loc.gov/rr/print/res/114_habs.html
- Reproduction Number: ---
- Call Number: HAER ID-27-A
- Medium:
Photo(s): 17
Data Page(s): 7
Photo Caption Page(s): 2
If Digital Images Are Displaying
You can download online images yourself. Alternatively, you can purchase copies of various types through Library of Congress Duplication Services.
HABS/HAER/HALS materials have generally been scanned at high resolution that is suitable for most publication purposes (see Digitizing the Collection for further details about the digital images).
- Photographs--All photographs are printed from digital files to preserve the fragile originals.
- Make note of the Call Number and Item Number that appear under the photograph in the multiple-image display (e.g., HAER, NY,52-BRIG,4-2).
- If possible, include a printout of the photograph.
- Drawings--All drawings are printed from digital files to preserve the fragile originals.
- Make note of the Survey Number (e.g., HAER NY - 143) and Sheet Number (e.g., "Sheet 1 of 4"), which appear on the edge of the drawing. (NOTE: These numbers are visible in the Tiff "Reference Image" display.)
- If possible, include a printout of the drawing.
- Data Pages
- Make note of the Call Number in the catalog record.
If Digital Images Are Not Displaying
In the rare case that a digital image for HABS/HAER/HALS documentation is not displaying online, select images for reproduction through one of these methods:
- Visit the Prints & Photographs Reading Room and request to view the group (general information about service in the reading room is available at: http://www.loc.gov/rr/print/info/001_ref.html). It is best to contact reference staff in advance (see: http://www.loc.gov/rr/print/address.html) to make sure the material is on site. OR
- P&P reading room staff can provide up to 15 quick copies of items per calendar year (many original items in the holdings are too old or fragile to make such copies, but generally HABS/HAER/HALS materials are in good enough condition to be placed on photocopy machines). For assistance, see our Ask a Librarian page OR
- Hire a freelance researcher to do further selection for you (a list of researchers in available at: http://www.loc.gov/rr/print/resource/013_pic.html).
- You can purchase copies of various types, including quick copies, through Library of Congress Duplication Services (price lists, contact information, and order forms for Library of Congress Duplication Services are available on the Duplication Services Web site):
- Make note of the Call Number listed above.
- Look at the Medium field above. If it lists more than one item:
- The entire group can be ordered as photocopies or high-quality copies.
- All the items in a particular medium (e.g., all drawings, all photographs) can be ordered as photocopies or high-quality copies.
- Call Number: HAER ID-27-A
- Medium:
Photo(s): 17
Data Page(s): 7
Photo Caption Page(s): 2
Please use the following steps to determine whether you need to fill out a call slip in the Prints and Photographs Reading Room to view the original item(s). In some cases, a surrogate (substitute image) is available, often in the form of a digital image, a copy print, or microfilm.
-
Is the item digitized? (A thumbnail (small) image will
be visible on the left.)
-
Yes, the item is digitized. Please use the digital image in preference to requesting the original. All images can be viewed at a large size when you are in any reading room at the Library of Congress. In some cases, only thumbnail (small) images are available when you are outside the Library of Congress because the item is rights restricted or has not been evaluated for rights restrictions.
As a preservation measure, we generally do not serve an original item when a digital image is available. If you have a compelling reason to see the original, consult with a reference librarian. (Sometimes, the original is simply too fragile to serve. For example, glass and film photographic negatives are particularly subject to damage. They are also easier to see online where they are presented as positive images.)
-
No, the item is not digitized. Please go to #2.
-
-
Do the Access Advisory or Call Number fields above indicate that
a non-digital surrogate exists, such as microfilm or copy prints?
-
Yes, another surrogate exists. Reference staff can direct you to this surrogate.
-
No, another surrogate does not exist. Please go to #3.
-
-
If you do not see a thumbnail image or a reference to another surrogate, please fill out a call slip in the Prints and Photographs Reading Room. In many cases, the originals can be served in a few minutes. Other materials require appointments for later the same day or in the future. Reference staff can advise you in both how to fill out a call slip and when the item can be served.
To contact Reference staff in the Prints and Photographs Reading Room, please use our Ask A Librarian service or call the reading room between 8:30 and 5:00 at 202-707-6394, and Press 3.