Queensboro Bridge, Under Construction.

Bridge, Blackwell's Island Construction.

[Queensboro Bridge under construction.]

Bridge, Blackwell's Island Construction.

[Queensboro Bridge under construction.]

Queensboro Bridge. Upper road and towers. Construction view

Panama Canal Construction.

[Upper East Side with Queensboro Bridge and Hell Gate Bridge.]

Panama Canal Construction.

[Verrazano Bridge under construction.]

[French Line, S.S. "Normandie", Under Construction, Saint-Nazaire, France.]

Panama Canal Construction.

[Verrazano Bridge under construction.]

[Verrazano Bridge under construction.]

[Queensboro Bridge.]

Queensboro Bridge. View of bridge framework from Suicide Balcony.

Queensboro Bridge. Workers repainting bridge

[Construction.]

[Construction site.]

Panama Canal Construction.