Centralia Coal Mine Dam No 44
Centralia Coal Mine Dam No 44 is an earth dam located in Lewis County, Washington, built in 1975. It carries a Low hazard potential classification.
About Centralia Coal Mine Dam No 44
The primary purpose of Centralia Coal Mine Dam No 44 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 19 feet tall, creates a reservoir covering 28 acres, has a maximum storage capacity of 325 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1975, the structure is well into its service life at over 50 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Lewis |
| Nearest City | Centralia |
| River/Stream | Tr-packwood Creek |
| Coordinates | 46.74180, -122.82202 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 325 acre-ft |
| Max Storage | 325 acre-ft |
| Normal Storage | 180 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 115 cfs |
Ownership & Safety
| Purpose | Tailings |
| Owner | TransAlta Centralia Mining LLC |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00584 |
| Federal ID | WA00584 |
| More Info | State Dam Safety Program |