Tioga Dam

White Earth River-TR· Williams, North Dakota· Built 1963· Earth· 39 ft tall
High Hazard Recreation Flood Risk Reduction Local Government

Key Takeaway

Tioga Dam is classified as high hazard in North Dakota. It was completed in 1963 and is 63 years old. Its primary use is recreation. 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 39 ft (taller than 91.8% in ND)
Dam Length1,660 ft
Dam TypeEarth
Max Storage1.6K acre-ft
Normal Storage820 acre-ft
Surface Area83 acres
Drainage Area6 sq mi
Year Completed1963 (63 years old)
NID IDND00026

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: June 27, 2019
State Regulated: Yes
Regulatory Agency: ND DWR

Ownership

City of Tioga

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Tioga Dam?

Tioga Dam 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 Tioga Dam?

Tioga Dam is owned by City of Tioga (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Tioga Dam built?

Tioga Dam was completed in 1963, making it 63 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 Tioga Dam?

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

How tall is Tioga Dam?

Tioga Dam 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 Tioga Dam last inspected?

Tioga Dam was last inspected on June 27, 2019. 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.