Locke Dam
Locke Dam is an earth dam located in Pend Oreille County, Washington, built in 1973. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Locke Dam
The primary purpose of Locke 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 Fountain, William & Jack (private). It impounds the Tr-pend Oreille River near Locke.
The dam stands 25 feet tall and stretches 165 feet across, creates a reservoir covering 1,000 acres, has a maximum storage capacity of 2,300 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1973, the structure is well into its service life at over 50 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 09/27/2022.
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 | Pend Oreille |
| Nearest City | Locke |
| River/Stream | Tr-pend Oreille River |
| Coordinates | 48.42626, -117.32682 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Length | 165 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 2,300 acre-ft |
| Max Storage | 2,300 acre-ft |
| Normal Storage | 1,400 acre-ft |
| Surface Area | 1,000 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 174 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Fountain, William & Jack |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/27/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00019 |
| Federal ID | WA00019 |
| More Info | State Dam Safety Program |