Lyon Lake Dam
Lyon Lake Dam is an earth dam located in Grant County, Washington, built in 1971. It carries a Low hazard potential classification.
About Lyon Lake Dam
The primary purpose of Lyon Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Wa Dfw (state). It impounds the Tr-crab Creek.
The dam stands 13 feet tall and stretches 530 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 68 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1971, 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.
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Location
| State | Washington |
| County | Grant |
| River/Stream | Tr-crab Creek |
| Coordinates | 47.27376, -119.32890 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Length | 530 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 68 acre-ft |
| Max Storage | 68 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | WA DFW |
| Owner Type | State |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00043 |
| Federal ID | WA00043 |
| More Info | State Dam Safety Program |