Loon Lake Control Structure
Loon Lake Control Structure is a gravity dam located in Stevens County, Washington, built in 1951. It carries a Low hazard potential classification and has a fair condition assessment.
About Loon Lake Control Structure
The primary purpose of Loon Lake Control Structure is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Under Investigation (private). It impounds the Tr-sheep Creek near Springdale.
The dam stands 8 feet tall and stretches 25 feet across, creates a reservoir covering 279 acres, and has a maximum storage capacity of 5,590 acre-feet. Completed in 1951, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 09/08/2021.
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Location
| State | Washington |
| County | Stevens |
| Nearest City | Springdale |
| River/Stream | Tr-sheep Creek |
| Coordinates | 48.05851, -117.65177 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 8 ft |
| Dam Length | 25 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 5,590 acre-ft |
| Max Storage | 5,590 acre-ft |
| Normal Storage | 5,590 acre-ft |
| Surface Area | 279 acres |
Ownership & Safety
| Purpose | Recreation |
| Owner | Under Investigation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/08/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA01208 |
| Federal ID | WA01208 |
| More Info | State Dam Safety Program |