This 1969 image depicts a 12-story concrete core for an office building in Vancouver, Canada, that was one of the earliest examples of top-down construction.
The second deadliest dam failure in U.S. history happened suddenly. The St. Francis Dam was a 205-ft-high concrete gravity arch dam located in San Francisquito Canyon, 30 miles north of Los Angeles.<
Moving hot oil across Arctic terrain was an unprecedented challenge following the discovery of America’s largest oil field in 1969 in Prudhoe Bay, Alaska.
This 1964 image is perhaps the closest ENR ever came to dabbling in Op Art. It shows two workers standing inside a large conical depression with fluted sides, which is a plastic form made of glass-fiber-reinforced polyester resin.
This 1925 cover image depicts a concrete mixing plant—one of three—for a vital project in downtown Chicago, in which South Water Street was transformed into Wacker Drive, a major multilevel street running along the Chicago River in the Loop.
The Colorado River was a fault line of near-tectonic political forces by the 1920s, as the seven states within its basin continued to grow in population.
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