Dan Evans was one of the designers of the two-mile long structure that stood as an alternative to the busy city streets and boasted impressive views of Elliott Bay and the Olympic Mountains.
The Alaskan Way Viaduct was a double-deck concrete highway that marked Seattle’s waterfront for more than 60 years.
Public Domain Concrete demolition via PXhere
Workers performing concrete chipping at substructure bridge repair sites had the highest level of respirable crystalline silica exposure, a time-weighted average of 527 micrograms per cubic meter of air. That is more than 10 times the PEL of 50 micrograms per cubic meter that OSHA established in its most recent silica regulation (1926.1153).