// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | 🌉 Bridge / Critical Crossing |
| Operator / Branch | Washington State Department of Transportation |
| Host County | Pierce County WA |
| Nearest City | Pepperell MA |
| Primary Risk Radius | 5 miles |
| Secondary Risk Radius | 20 miles |
// Strategic Significance
The Tacoma Narrows Bridge spanning Puget Sound is famous as the site of the original Galloping Gertie bridge that collapsed dramatically in 1940 due to resonance from wind. The current twin-span bridge is a critical link between the Kitsap Peninsula and the Tacoma metro. The Cascadia Subduction Zone earthquake risk creates serious vulnerability and the extreme Narrows winds that destroyed the original bridge remain an operational consideration.
// Civilian Impact Assessment
Pierce County with 930,000 residents and the Kitsap Peninsula with 280,000 residents. The original Tacoma Narrows Bridge collapse in 1940 is one of the most famous engineering disasters. Cascadia earthquake could damage the current bridge. The Kitsap Peninsula including Bremerton Naval Station depends on the bridge.
// Evacuation & Shelter Guidance
WA Route 16, WA Route 302, Puget Sound. Pierce County Emergency Management coordinates Cascadia earthquake bridge closure and Kitsap Peninsula isolation protocols.