Lake Isaac Dam

Isaacs Creek· Frederick, Virginia· Earth· 39 ft tall

High Hazard Recreation Private

Key Takeaway

Lake Isaac 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	39 ft (taller than 85.8% in VA)
Dam Length	393 ft
Dam Type	Earth
Max Storage	424 acre-ft
Normal Storage	213 acre-ft

Surface Area	20 acres
Drainage Area	3 sq mi
NID ID	VA069021

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: July 1, 2020

State Regulated: Yes

Regulatory Agency: Department of Conservation and Recreation

Ownership

Lake Isaac Estates POA

Private

Nearby Dams

Cove Ridge Tailing Pond

Frederick, VA

High Hazard 60 ft

Daniel Mcdowell Dam

Frederick, VA

Unknown 19 ft

Unimin Fresh Water Dam

Frederick, VA

High Hazard 46 ft

Cove Dam #2

Frederick, VA

High Hazard 43 ft

Cove Lake Dam #1

Frederick, VA

High Hazard 27 ft

Unimin Tailings Dam

Frederick, VA

High Hazard 96 ft

Summit Golf Dam

Frederick, VA

Unknown 33 ft

Lake Holiday Dam

Frederick, VA

High Hazard 102 ft

Frequently Asked Questions

What is the hazard classification of Lake Isaac Dam?

Lake Isaac 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 Lake Isaac Dam?

Lake Isaac Dam is owned by Lake Isaac Estates POA (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Lake Isaac Dam?

Lake Isaac 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 Lake Isaac Dam?

Lake Isaac 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 Lake Isaac Dam last inspected?

Lake Isaac Dam was last inspected on July 1, 2020. 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.