Ferndale Aerated Sewage Lagoon No 3
Ferndale Aerated Sewage Lagoon No 3 is an earth dam located in Whatcom County, Washington, built in 1986. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Ferndale Aerated Sewage Lagoon No 3
Ferndale Aerated Sewage Lagoon No 3 is a dam in Whatcom, Washington. The dam is owned by Ferndale City Hall (local government). It impounds the Tr-nooksack River-offstream near Within Ferndale City Limits.
The dam stands 17 feet tall and stretches 1,820 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 45 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1986, the structure is 40 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 10/08/2020.
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 | Whatcom |
| Nearest City | Within Ferndale City Limits |
| River/Stream | Tr-nooksack River-offstream |
| Coordinates | 48.83712, -122.59726 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Length | 1,820 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 45 acre-ft |
| Max Storage | 45 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 12 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Ferndale City Hall |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/08/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00514 |
| Federal ID | WA00514 |
| More Info | State Dam Safety Program |