Scraping the Canals ID: 400 | This file appears in: The Valley's Canal System Building the canal system demanded extensive physical labor as work crews cleared the canals with animals and scrapers. | Date: 1908 | Source: HAER-AZ-19-6; Historic American Engineering Record, Library of Congress | Rights: Library of Congress Download Original File SourceHAER-AZ-19-6; Historic American Engineering Record, Library of CongressDate1908RightsLibrary of Congress "Scraping the Canals" appears in: The Valley's Canal System