PENETRATION BITUMINOUS MACADAM
National Archives
Education
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PENETRATION BITUMINOUS MACADAM Produced: 1930
Description Macadam roads are constructed in Massachusetts and Rhode Island. Crushed stone and sand are spread on road beds, rolled, and broomed to remove foreign deposits. A layer of bituminous cement is spread and rolled. Emphasizes the need for careful leveling of the various layers to prevent buckling and rutting.
https://catalog.archives.gov/id/7338
Human-made No record of this work says a model made it. What this means.
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- Internet Archive, in FedFlix: US government films
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- The Internet Archive states none for this item.
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- National Archives
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- The archive gives no rating. Invisible Network shows it to Tweens profiles and older, judged from its collection and subjects. How films are placed
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