Little Twin Lakes Dam is an earth dam located in Mason County, Washington, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Little Twin Lakes Dam
The primary purpose of Little Twin Lakes Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Timberlake Community Club (private). It impounds the Tr-campbell Creek.
The dam stands 25 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 104 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1966, 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 | Mason |
| River/Stream | Tr-campbell Creek |
| Coordinates | 47.21650, -122.97243 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 104 acre-ft |
| Max Storage | 104 acre-ft |
| Normal Storage | 77 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 21 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Timberlake Community Club |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00090 |
| Federal ID | WA00090 |
| More Info | State Dam Safety Program |