Centralia Coal Mine Dam No 8a
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Washington |
| County | Lewis |
| River/Stream | Tr-South Hanaford Creek |
| Coordinates | 46.70702, -122.80861 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Length | 530 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 102 acre-ft |
| Max Storage | 102 acre-ft |
| Normal Storage | 58 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 2,897 cfs |
Ownership & Safety
| Purpose | Tailings |
| Owner | TransAlta Centralia Mining LLC |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/18/2025 |
| Emergency Action Plan | Yes |