Fair Lakes Dam #1

Big Rocky Run tributary· Fairfax, Virginia· Earth· 25 ft tall

High Hazard Flood Risk Reduction Private

Key Takeaway

Fair Lakes Dam #1 is classified as high hazard in Virginia. Its primary use is flood risk reduction. 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	25 ft (taller than 46.7% in VA)
Dam Length	980 ft
Dam Type	Earth
Max Storage	99 acre-ft
Normal Storage	10 acre-ft

Surface Area	4 acres
Drainage Area	1 sq mi
NID ID	VA059043

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: April 4, 2022

State Regulated: Yes

Regulatory Agency: Department of Conservation and Recreation

Ownership

SRI Seven Fair Lakes LLC

Private

Nearby Dams

East Market Pond Dam

Fairfax, VA

Significant Hazard 12 ft

Fair Lakes Land Bay 2 Swm Bmp Pond Dam

Fairfax, VA

High Hazard 21 ft

Hampton Forest Section 4 Swm Dam

Fairfax, VA

High Hazard 16 ft

Penderbrook South Pond Dam

Fairfax, VA

Unknown 19 ft

Penderbrook North Pond Dam

Fairfax, VA

Unknown 20 ft

Fairfax Center Regional Swm Pond #D77

Fairfax, VA

Low Hazard 26 ft

North Twin Lake Dam

Fairfax, VA

Significant Hazard 26 ft

Martins Lake Dam

Fairfax, VA

Unknown 19 ft

Frequently Asked Questions

What is the hazard classification of Fair Lakes Dam #1?

Fair Lakes Dam #1 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 Fair Lakes Dam #1?

Fair Lakes Dam #1 is owned by SRI Seven Fair Lakes LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Fair Lakes Dam #1?

Fair Lakes Dam #1 serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Fair Lakes Dam #1?

Fair Lakes Dam #1 has a dam height of 25 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 Fair Lakes Dam #1 last inspected?

Fair Lakes Dam #1 was last inspected on April 4, 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.