Butterfly Lake Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Missouri |
| County | Ste. Genevieve |
| Nearest City | RIVER AUX VASES |
| River/Stream | RIVER AUX VASES |
| Coordinates | 37.78781, -90.24726 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 68 ft |
| Dam Height | 68 ft |
| Dam Length | 600 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 1,768 acre-ft |
| Max Storage | 1,768 acre-ft |
| Normal Storage | 1,091 acre-ft |
| Surface Area | 65 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 22,465 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/22/2022 |
| Emergency Action Plan | Yes |