Asamera Cannon Mine Tailings Dam is an earth dam located in Chelan County, Washington, built in 1986. It carries a High hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 340 ft340 ft tall and 1,150 ft long, 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 Asamera Cannon Mine Tailings Dam
The primary purpose of Asamera Cannon Mine Tailings Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Conocophillips (private). It impounds the Dry Gulch near Wenatchee.
The dam stands 340 feet tall and stretches 1,150 feet across, creates a reservoir covering 2,500 acres, has a maximum storage capacity of 950 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1986, the structure is 40 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/19/2022.
At 340 feet, this dam is taller than 99% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Washington dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Chelan |
| Nearest City | Wenatchee |
| River/Stream | Dry Gulch |
| Coordinates | 47.38485, -120.34071 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 340 ft |
| Dam Length | 1,150 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 950 acre-ft |
| Max Storage | 950 acre-ft |
| Normal Storage | 540 acre-ft |
| Surface Area | 2,500 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,370 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Conocophillips |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/19/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00499 |
| Federal ID | WA00499 |
| More Info | State Dam Safety Program |