Anderson Lake Dam
Anderson Lake Dam is an earth dam located in Mason County, Washington, built in 1966. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Anderson Lake Dam
The primary purpose of Anderson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lakeland Village Community Club (private). It impounds the Unnamed Tr-sherwood Creek near Allyn.
The dam stands 28 feet tall and stretches 240 feet across, creates a reservoir covering 44 acres, has a maximum storage capacity of 600 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 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 09/10/2020.
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 | Mason |
| Nearest City | Allyn |
| River/Stream | Unnamed Tr-sherwood Creek |
| Coordinates | 47.37953, -122.84875 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Length | 240 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 370 acre-ft |
| Surface Area | 44 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 520 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lakeland Village Community Club |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/10/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00114 |
| Federal ID | WA00114 |
| More Info | State Dam Safety Program |