Davenport Sewage Lagoon No 2

Tr-Cottonwood Creek-Offstream· Lincoln, Washington· Built 1987· Earth·
High Hazard Other Local Government

Key Takeaway

Davenport Sewage Lagoon No 2 is classified as high hazard in Washington. It was completed in 1987 and is 39 years old. Its primary use is other. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Length1,300 ft
Dam TypeEarth
Max Storage53 acre-ft
Normal Storage37 acre-ft
Surface Area8 acres
Drainage Area0 sq mi
Max Discharge2 cfs
Year Completed1987 (39 years old)
NID IDWA01602

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: September 5, 2023
State Regulated: Yes
Regulatory Agency: Washington Dept of Ecology

Ownership

Davenport City

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Davenport Sewage Lagoon No 2?

Davenport Sewage Lagoon No 2 is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Davenport Sewage Lagoon No 2?

Davenport Sewage Lagoon No 2 is owned by Davenport City (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Davenport Sewage Lagoon No 2 built?

Davenport Sewage Lagoon No 2 was completed in 1987, making it 39 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Davenport Sewage Lagoon No 2?

Davenport Sewage Lagoon No 2 serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was Davenport Sewage Lagoon No 2 last inspected?

Davenport Sewage Lagoon No 2 was last inspected on September 5, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.