The creation of Bend Whitewater Park rehabilitated a stretch of the Deschutes River in Bend, Ore., creating an improved habitat for fish and wildlife as well as a safer passage for river rafters with the West Coast’s first “adjustable standing wave” kayak/surfing run.
The $11-million upgrade to the Asplund Wastewater Treatment Facility’s disinfection system allowed the Anchorage, Alaska, facility to stop using hauled-in chlorine gas for disinfection and instead use potentially less dangerous sodium hypochlorite to create chlorine gas on demand.
Originally built in the 1980s for industrial use, the historic Ivar’s Pier 54 was deteriorating and in need of seismic improvements following the 2001 Nisqually earthquake and a decade of deferred maintenance.
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.