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File:LOCK AND DAM NO. 26 (REPLACEMENT). LOCK - LOCK GUIDEWALLS -DOWNSTREAM GUIDEWALL, PARTIAL ISOMETRIC VIEW. M-L 26(R) 26-40 - Upper Mississippi River 9-Foot Channel Project, Lock HAER ILL,60-ALT.V,1-44.tif

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LOCK AND DAM NO. 26 (REPLACEMENT). LOCK - LOCK GUIDEWALLS -DOWNSTREAM GUIDEWALL, PARTIAL ISOMETRIC VIEW. M-L 26(R) 26-40 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26R, Alton, Madison County, IL
Title
LOCK AND DAM NO. 26 (REPLACEMENT). LOCK - LOCK GUIDEWALLS -DOWNSTREAM GUIDEWALL, PARTIAL ISOMETRIC VIEW. M-L 26(R) 26-40 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26R, Alton, Madison County, IL
Description
U.S. Army Corps of Engineers
Depicted place Illinois; Madison County; Alton
Date Documentation compiled after 1968
Dimensions 4 x 5 in.
Current location
Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
Accession number
HAER ILL,60-ALT.V,1-44
Credit line
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.

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Notes
  • Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstream. The original installation is unable to adequately accommodate the present volume of river traffic and suffers from severe structural deficiencies. Lock and Dam No. 26R represent the present state of the art in river navigation control works. The basic components of the installation are comparable to those utilized in the 1930s. The most striking difference between the older installations and Lock and Dam No. 26R is the immense size of the new structures. The significance of the new installation is not limited to its size. Throughout the design and construction process, the Corps of Engineers and the various contractors have engaged in an extensive program of computer-assisted design, testing, and evaluation. These sophisticated studies represent perhaps the most significant difference between the older structures and Lock and Dam No. 26(R).
  • Survey number: HAER IL-32
  • Building/structure dates: 1979
Source https://www.loc.gov/pictures/item/il0556.photos.063090p
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

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current02:49, 17 July 2014Thumbnail for version as of 02:49, 17 July 20144,863 × 3,882 (18.01 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 16 July 2014 (1201:1400)

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