The design of the Sydney Harbour Bridge closely resembles the Hell Gate Bridge over the East River in New York City, conceived in 1916 by noted engineer Gustav Lindenthal and his chief assistant, O.H. Ammann.
Freeman
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Image Credit: Courtesy Flickr/Kevin Gibbons (CC BY 2.0)Image Caption: Sydney Harbour BridgeEra_date_from: 1932
1988
The Charles River Basin was one of the pioneering environmental engineering projects in America. The project transformed 675 acres of unhealthy and unsightly salt marshes and tidal flats were into an environmental centerpiece for the Boston area by 1910. This was one of the first public projects to radically improve the environment and has served as a model for similar projects around the nation.
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Image Credit: Courtesy Wikipedia/Daderot (CC BY-SA 3.0)Image Caption: Charles River Basin ProjectEra_date_from: 1910
1981
The first long underwater tunnel in the world designed for motor vehicle use was built from 1920 to 1927. The 29.5-foot-diameter, 8,500-foot-long twin tubes of this tunnel were shield-driven by the pneumatic method through extremely difficult river-bottom conditions that were overcome by the ingenuity and determination of its engineers, Clifford M. Holland, Milton H. Freeman, and Ole Singstad. They were the largest in the United States when built.
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Image Credit: Courtesy Flickr/Bill Benzon (CC BY-SA 2.0)Image Caption: Holland Tunnel Ventilation SystemEra_date_from: 1920
1984