Mardis Barry

Tr Susan River· Lassen, California· Built 1941· Earth· 14 ft tall
Significant Hazard Water Supply Irrigation Private

Key Takeaway

Mardis Barry is classified as significant hazard in California. It was completed in 1941 and is 85 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 14 ft (taller than 6.7% in CA)
Dam Length600 ft
Dam TypeEarth
Max Storage113 acre-ft
Surface Area29 acres
Drainage Area3 sq mi
Year Completed1941 (85 years old)
NID IDCA00939

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: November 4, 2021
State Regulated: Yes
Regulatory Agency: DWR, Division of Safety of Dams

Ownership

City of Susanville

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Mardis Barry?

Mardis Barry 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 Mardis Barry?

Mardis Barry is owned by City of Susanville (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Mardis Barry built?

Mardis Barry was completed in 1941, making it 85 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 Mardis Barry?

Mardis Barry serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Mardis Barry?

Mardis Barry has a dam height of 14 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 Mardis Barry last inspected?

Mardis Barry was last inspected on November 4, 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.