18 Foot Penetration in Clay Soil 400 Blows #1 Vulcan

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Size: 1308px × 1910px
Photo credit: © ART Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ancient, bygone, clay, construction, dams, drivers, equipment, historic, history, image, lake, pile, reservoirs, rock, soils, texas, white