Big Four Mine Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Missouri |
| County | Washington |
| Nearest City | FLETCHER |
| River/Stream | TRIB-CALICO CREEK |
| Coordinates | 38.15493, -90.77007 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 73 ft |
| Dam Height | 73 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 1,980 acre-ft |
| Max Storage | 1,980 acre-ft |
| Normal Storage | 1,980 acre-ft |
| Surface Area | 85 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 245 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Tailings |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/28/2021 |
| Emergency Action Plan | Yes |