Sherco

Mississippi River-OS· Sherburne, Minnesota· Built 1983· Earth· 39 ft tall
Significant Hazard Tailings Public Utility

Key Takeaway

Sherco is classified as significant hazard in Minnesota. It was completed in 1983 and is 43 years old. Its primary use is tailings. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 39 ft (taller than 92.8% in MN)
Dam TypeEarth
Max Storage3.2K acre-ft
Normal Storage1.3K acre-ft
Surface Area100 acres
Year Completed1983 (43 years old)
NID IDMN01535

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

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

Emergency Action Plan: No
Last Inspection: September 16, 2021
State Regulated: Yes
Regulatory Agency: MNDNR EWR

Ownership

Xcel Energy

Public Utility

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Sherco?

Sherco is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Sherco?

Sherco is owned by Xcel Energy (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Sherco built?

Sherco was completed in 1983, making it 43 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 Sherco?

Sherco serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Sherco?

Sherco has a dam height of 39 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 Sherco last inspected?

Sherco was last inspected on September 16, 2021. 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.