// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | 🌊 Major Dam / Flood Control |
| Operator / Branch | Entergy Arkansas |
| Host County | Garland County AR |
| Nearest City | Pepperell MA |
| Primary Risk Radius | 10 miles |
| Secondary Risk Radius | 25 miles |
// Strategic Significance
Carpenter Dam impounds the 7,200-acre Lake Hamilton along the southern and southwestern portions of Hot Springs. Built in 1931 by Arkansas Power and Light (now Entergy), it generates 56 megawatts of hydroelectric power. Unlike Blakely Mountain Dam upstream, Carpenter Dam was NOT designed for flood control — making Lake Hamilton more prone to flooding than Lake Ouachita. The dam sits immediately adjacent to heavily developed residential and commercial lakefront property. Notable floods on Lake Hamilton occurred in 1982 and 1990. The dam is listed on the National Register of Historic Places.
// Civilian Impact Assessment
Lake Hamilton's shores are lined with residential developments, condominiums, marinas, and tourist businesses. A dam failure event or major uncontrolled release would directly inundate these properties with minimal warning time given the dam's proximity to the urban area. Flooding in 1982 and 1990 demonstrated the real flood risk even during normal operations.
// Evacuation & Shelter Guidance
Lake Hamilton shoreline residents should have immediate evacuation plans in place. Follow Garland County OEM directions. Move inland and uphill away from the lake and Ouachita River corridor immediately upon any emergency alert.