Even as crews work to solve engineering quandaries associated with building the Hanford Waste Treatment and Immobilization Plant project in southeast Washington at the Dept. of Energy’s Hanford Nuclear Waste Site, work continues on tearing out the old facilities.
In its so-called Fight Plan 2037, Vancouver International Airport identifies 75 projects as part of a 20-year, $5.6-billion improvement plan, which expands everything from terminals to a potential new runway.
The holiday season provided some rest for Bertha, the tunnel-boring machine roughly three-quarters of the way through its route to bore a new State Route 99 tunnel under downtown Seattle, but that doesn’t mean crews have had it so easy.
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.