File:Chicago Drainage Canal construction, 1900s.jpg

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Summary

Description
English: Chicago Drainage Canal construction, 1900s
Date
Source Rock excavation: methods and cost. New York : M.C Clark, 1904. p. 256
Author Gillette, Halbert Powers

Licensing

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1931, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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copyright status

public domain

applies to jurisdiction: United States

inception

1904

media type

image/jpeg

checksum

4460f49f834a08750dc4e4fb8221b927253d5885

determination method or standard: SHA-1

data size

86,154 byte

height

668 pixel

width

577 pixel

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Date/TimeThumbnailDimensionsUserComment
current14:09, 12 December 2014Thumbnail for version as of 14:09, 12 December 2014577 × 668 (84 KB)MddUser created page with UploadWizard

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allikas: https://en.wikipedia.org/wiki/File:Chicago_Drainage_Canal_construction,_1900s.jpg