Top: Sectional view of workings under East River, New York, during preparations to destroy Flood Rock, part of the Hell Gate Rocks complex which prevented large vessels reaching New York Harbour, and presented a hazard to smaller ones. Bottom: Placing dyn

---

Size: 2501px × 3543px
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., /, america, bottom:, chemistry, civil, complex, destroy, dyn, dynamite, east, engineering, explosifs, flood, gate, harbour, hazard, hell, industrial, large, part, placing, preparations, presented, prevented, reaching, river, rock, rocks, sectional, smaller, top:, usa, vessels, view, workings, york