// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | ⚡ Power Plant / Substation |
| Operator / Branch | US Army Corps of Engineers / BPA |
| Host County | Multnomah County OR |
| Nearest City | Cascade Locks, OR |
| Primary Risk Radius | 10 miles |
| Secondary Risk Radius | 25 miles |
// Strategic Significance
Bonneville Dam on the Columbia River generates 1,100 megawatts of hydroelectric power for the Pacific Northwest grid and is operated by the Bonneville Power Administration. The dam sits in the Cascadia Subduction Zone earthquake zone and a major Cascadia earthquake could simultaneously damage the dam and disrupt Columbia River navigation. BPA transmission lines from Bonneville are critical to the Pacific Northwest power grid.
// Civilian Impact Assessment
Multnomah County with 800,000 residents and the Pacific Northwest power grid. Bonneville provides 1,100 MW to the grid. Cascadia earthquake could damage the dam and transmission infrastructure simultaneously. Columbia River navigation critical to Pacific Northwest agriculture depends on Bonneville locks.
// Evacuation & Shelter Guidance
I-84, US-30, Columbia River. Multnomah County Emergency Management coordinates Cascadia earthquake dam failure and grid emergency protocols.