Removing rocks obstructing the Hell Gate, a narrow tidal strait in New York’s East River. It used 300,000 pounds (140,000 kg) of explosives, probably the largest artificial explosion in the 19th century. October 10, 1885, scan from a book from 1893 [1303×806]

Removing rocks obstructing the Hell Gate, a narrow tidal strait in New York’s East River. It used 300,000 pounds (140,000 kg) of explosives, probably the largest artificial explosion in the 19th century. October 10, 1885, scan from a book from 1893 [1303×806]

by Xi_JinpingXIV