Boeing Creek M1 Detention Dam
Boeing Creek M1 Detention Dam is an earth dam located in King County, Washington, built in 1983. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Boeing Creek M1 Detention Dam
The primary purpose of Boeing Creek M1 Detention Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Shoreline (local government). It impounds the Boeing Creek near Within Seattle City Limits.
The dam stands 40 feet tall and stretches 160 feet across, has a maximum storage capacity of 12 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1983, the structure is 43 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 08/05/2020.
At 40 feet, this dam is taller than 87% of dams nationwide.
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 | King |
| Nearest City | Within Seattle City Limits |
| River/Stream | Boeing Creek |
| Coordinates | 47.75204, -122.36007 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Length | 160 ft |
| Year Completed | 1983 (43 years old) |
Storage & Hydraulics
| NID Storage | 12 acre-ft |
| Max Storage | 12 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,200 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Shoreline |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/05/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00483 |
| Federal ID | WA00483 |
| More Info | State Dam Safety Program |