Centralia Coal Mine Dam No 3d is an earth dam located in Lewis County, Washington, built in 1988. It carries a Low hazard potential classification.
Dam profile
NID height · 285 ft285 ft tall, taller than 99% of U.S. dams with a recorded height. Height is drawn to scale against the Statue of Liberty, 305 ft ground to torch; the profile is a generic embankment section and the water level is illustrative.
About Centralia Coal Mine Dam No 3d
The primary purpose of Centralia Coal Mine Dam No 3d is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Transalta Centralia Mining LLC (public utility). It impounds the Tr-packwood Creek near Centralia.
The dam stands 285 feet tall, creates a reservoir covering 200 acres, has a maximum storage capacity of 15,000 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1988, the structure is 38 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
At 285 feet, this dam is taller than 99% of all dams in the United States.
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Location
| State | Washington |
| County | Lewis |
| Nearest City | Centralia |
| River/Stream | Tr-packwood Creek |
| Coordinates | 46.72291, -122.82131 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 285 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 15,000 acre-ft |
| Max Storage | 15,000 acre-ft |
| Normal Storage | 7,500 acre-ft |
| Surface Area | 200 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | Transalta Centralia Mining LLC |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00580 |
| Federal ID | WA00580 |
| More Info | State Dam Safety Program |