Photo courtesy US Army Corps of Engineers The U.S. Army Corps of Engineers has awarded a $691-million contract for the Howard A. Hanson Dam Additional Water Storage Fish Passage Facility in Washington state to a FlatironDragados-Aecon joint venture. The dam, located in King County, serves as the primary line of defense against catastrophic flooding in the Green River Valley. Delivered under an integrated design-build model, construction is expected to begin this year following the development phase and conclude in 2031. The project will add a downstream facility with vertically stacked ports to improve fish passage and expand water storage capacity. The upgrade will enhance flood control, support regional growth and restore salmon access to significant upstream habitat. Sound Transit opened the Crosslake Connection —a $3.82-billion, seven-mile segment of the transit agency’s light rail system—on March 28.…