// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | 🌊 Major Dam / Flood Control |
| Operator / Branch | Bureau of Reclamation |
| Host County | Lewis and Clark County MT |
| Nearest City | Pepperell MA |
| Primary Risk Radius | 20 miles |
| Secondary Risk Radius | 100 miles |
// Strategic Significance
Canyon Ferry Dam on the Missouri River creates Canyon Ferry Lake the largest body of water in Montana. A failure would send water toward Helena the state capital within hours. The dam supplies water for agriculture and recreation across a large portion of central Montana.
// Civilian Impact Assessment
Helena MT with 33,000 residents sits downstream. The Missouri River valley below the dam contains significant agricultural land and rural communities.
// Evacuation & Shelter Guidance
US-12, Montana Route 284. Lewis and Clark County Emergency Management coordinates with Bureau of Reclamation.