Seatac Airport Se Pond
Seatac Airport Se Pond is an earth dam located in King County, Washington, built in 2007. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Seatac Airport Se Pond
The primary purpose of Seatac Airport Se Pond 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 Port Of Seattle (local government). It impounds the Offstream - Des Moines Ck near Des Moines.
The dam stands 9 feet tall and stretches 490 feet across, has a maximum storage capacity of 14 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2007, the structure is relatively new.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. 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 07/30/2020.
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Location
| State | Washington |
| County | King |
| Nearest City | Des Moines |
| River/Stream | Offstream - Des Moines Ck |
| Coordinates | 47.43361, -122.30031 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Length | 490 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 14 acre-ft |
| Max Storage | 14 acre-ft |
| Normal Storage | 11 acre-ft |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Port of Seattle |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/30/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA01901 |
| Federal ID | WA01901 |
| More Info | State Dam Safety Program |