Steve Wyrembelski, senior geotechnical engineer with the Walla Walla District, U.S. Army Corps of Engineers, performs an inspection of Blue River Dam, operated by the Corps’ Portland District, June 15 during a regional Cascadia Subduction Zone earthquake response exercise. Wyrembelski was flown by helicopter from Walla Walla to Portland District’s Cougar and Blue River dams, located about 38 miles east of Eugene, Oregon, to inspect the structures as part of a five-person local damage assessment team (LDAT). In the event of a real Cascadia megathrust quake, the Walla Walla-based team would travel to Portland District’s area of operations, if needed, to assist with infrastructure assessments in the aftermath.