Serenity Lake Dam
Serenity Lake Dam is an earth dam located in Stevens County, Washington, built in 1972. It carries a High hazard potential classification and has a poor condition assessment.
About Serenity Lake Dam
The primary purpose of Serenity Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Longwood Limited Partnership (private). It impounds the Tr-colville River near Valley.
The dam stands 17 feet tall and stretches 525 feet across, creates a reservoir covering 61 acres, has a maximum storage capacity of 209 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1972, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 08/26/2021.
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 | Stevens |
| Nearest City | Valley |
| River/Stream | Tr-colville River |
| Coordinates | 48.15347, -117.65708 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Length | 525 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 209 acre-ft |
| Max Storage | 209 acre-ft |
| Normal Storage | 145 acre-ft |
| Surface Area | 61 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 300 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Longwood Limited Partnership |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 08/26/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00060 |
| Federal ID | WA00060 |
| More Info | State Dam Safety Program |