Plattsmouth 10-A

TR-MISSOURI RIVER· Cass, Nebraska· Built 1959· Earth· 40 ft tall
High Hazard Flood Risk Reduction Local Government

Key Takeaway

Plattsmouth 10-A is classified as high hazard in Nebraska. It was completed in 1959 and is 67 years old. Its primary use is flood risk reduction. 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 Height 40 ft (taller than 90.3% in NE)
Dam Length946 ft
Dam TypeEarth
Max Storage137 acre-ft
Normal Storage13 acre-ft
Surface Area3 acres
Drainage Area0 sq mi
Max Discharge1,932 cfs
Year Completed1959 (67 years old)
NID IDNE00097

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: October 18, 2023
State Regulated: Yes
Regulatory Agency: NE DNR

Ownership

City of Plattsmouth

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Plattsmouth 10-A?

Plattsmouth 10-A 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 Plattsmouth 10-A?

Plattsmouth 10-A is owned by City of Plattsmouth (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Plattsmouth 10-A built?

Plattsmouth 10-A was completed in 1959, making it 67 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 Plattsmouth 10-A?

Plattsmouth 10-A serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Plattsmouth 10-A?

Plattsmouth 10-A has a dam height of 40 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Plattsmouth 10-A last inspected?

Plattsmouth 10-A was last inspected on October 18, 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.