Dunn Ranch

Tr Hamilton Cr· Riverside, California· Built 1987· Earth· 44 ft tall
High Hazard Water Supply Irrigation Private

Key Takeaway

Dunn Ranch is classified as high hazard in California. It was completed in 1987 and is 39 years old. Its primary use is water supply. 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 44 ft (taller than 52.6% in CA)
Dam Length425 ft
Dam TypeEarth
Max Storage90 acre-ft
Surface Area7 acres
Drainage Area0 sq mi
Year Completed1987 (39 years old)
NID IDCA01302

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: No
Last Inspection: April 27, 2022
State Regulated: Yes
Regulatory Agency: DWR, Division of Safety of Dams

Ownership

The Agri-Empire Corporation

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Dunn Ranch?

Dunn Ranch 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 Dunn Ranch?

Dunn Ranch is owned by The Agri-Empire Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Dunn Ranch built?

Dunn Ranch 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 Dunn Ranch?

Dunn Ranch 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 Dunn Ranch?

Dunn Ranch has a dam height of 44 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 Dunn Ranch last inspected?

Dunn Ranch was last inspected on April 27, 2022. 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.