File:Chicago & North Western Railway viaduct over Des Moines River, near Boone, Iowa (HAER).jpg

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English: ELEVATION OF TRUSS, FROM NORTH, WITH TRAIN - Chicago & North Western Railway viaduct over Des Moines River, near Boone, Iowa. This bridge is one of the last projects of noted bridge engineer George Morison, who died two years after the structure was built. The bridge was the longest and heaviest viaduct of its time, and may be the longest extant double-track railroad viaduct in the world. It is listed in the National Register of Historic Places.Historic American Engineering Record, Library of Congress Prints and Photographs Division:
  • Survey number: HAER IA-44
Date after 1993
date QS:P,+1993-00-00T00:00:00Z/7,P1319,+1993-00-00T00:00:00Z/9
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https://cdn.loc.gov/service/pnp/habshaer/ia/ia0400/ia0420/color/571504cv.jpg

This file comes from the Historic American Engineering Record (HAER). This is a program 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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Author Not provided, Historic American Engineering Record, Survey number: HAER IA-44
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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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Image extraction processThis file has an extracted image: Chicago & North Western Railway viaduct over Des Moines River, near Boone, Iowa. Chicago & Northwestern Railroad Boon Viaduct (HAER) (cropped).jpg.
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current05:17, 14 March 2017Thumbnail for version as of 05:17, 14 March 20171,024 × 819 (323 KB)Taterian (talk | contribs)Transferred from https://cdn.loc.gov/service/pnp/habshaer/ia/ia0400/ia0420/color/571504cv.jpg

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