Historic
Alvord Lake Bridge
The Alvord Lake Bridge was the first reinforced concrete bridge built in America. It was built in 1889 by Ernest L. Ransome, an innovator in reinforced concrete design, mixing equipment, and construction systems. The bridge was constructed as a single arch 64 feet (20 m) wide with a 20-foot (6.1 m) span.
Why it's on the map
The Alvord Lake Bridge was the first reinforced concrete bridge built in America.
The bridge was designated a historic civil engineering landmark by the American Society of Civil Engineers in 1969.
Source: Wikipedia / Wikidata
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