Davenport Sewage Lagoon No 1
Davenport Sewage Lagoon No 1 is an earth dam located in Lincoln County, Washington, built in 1993. It carries a High hazard potential classification and has a fair condition assessment.
About Davenport Sewage Lagoon No 1
Davenport Sewage Lagoon No 1 is a dam in Lincoln, Washington. The dam is owned by Davenport City (local government). It impounds the Tr-cottonwood Creek-offstream near Davenport.
The dam stands 7 feet tall and stretches 2,100 feet across, creates a reservoir covering 39 acres, has a maximum storage capacity of 48 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1993, the structure is 33 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/25/2021.
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 | Lincoln |
| Nearest City | Davenport |
| River/Stream | Tr-cottonwood Creek-offstream |
| Coordinates | 47.66765, -118.14897 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Length | 2,100 ft |
| Year Completed | 1993 (33 years old) |
Storage & Hydraulics
| NID Storage | 48 acre-ft |
| Max Storage | 48 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 39 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 4 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Davenport City |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 08/25/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA01727 |
| Federal ID | WA01727 |
| More Info | State Dam Safety Program |