Omisol Dam

Hooes Run· Prince William, Virginia· Earth· 21 ft tall

High Hazard Recreation Private

Key Takeaway

Omisol Dam is classified as high hazard in Virginia. 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	21 ft (taller than 31.6% in VA)
Dam Length	250 ft
Dam Type	Earth
Max Storage	156 acre-ft
Normal Storage	23 acre-ft

Surface Area	5 acres
Drainage Area	5 sq mi
NID ID	VA153007

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: August 21, 2012

State Regulated: Yes

Regulatory Agency: Department of Conservation and Recreation

Ownership

Omisol Homeowners Association

Private

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Frequently Asked Questions

What is the hazard classification of Omisol Dam?

Omisol 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 Omisol Dam?

Omisol Dam is owned by Omisol Homeowners Association (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Omisol Dam?

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

How tall is Omisol Dam?

Omisol Dam has a dam height of 21 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 Omisol Dam last inspected?

Omisol Dam was last inspected on August 21, 2012. 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.