1881 Article Flood Rock Excavation Explosion Hell Gate New York Harbor Reef MAB1 XGPC4 This is an original 1923

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1881 Article Flood Rock Excavation Explosion Hell Gate New York Harbor Reef MAB1 XGPC4 This is an original 1923This is an original 1881 two page print article about the removal of Flood Rock at Hell Gate in New York Harbor. The method employed in these operations is very simple in principle, but the work is both costly and tedious. To aid in this necessary operation, the surface of the reef is first cleared off with the aid of ordinary dredging machines and the water jet apparatus, the latter serving to carry away the sand and smaller loose particle of rock,