Erin Lake Dam

CHATTAHOOCHEE RIVER· DeKalb, Georgia· Built 1960· Earth· 34 ft tall

High Hazard Recreation Local Government

Key Takeaway

Erin Lake Dam is classified as high hazard in Georgia. It was completed in 1960 and is 66 years old. 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	34 ft (taller than 85% in GA)
Dam Length	366 ft
Dam Type	Earth
Max Storage	166 acre-ft

Surface Area	12 acres
Drainage Area	0 sq mi
Year Completed	1960 (66 years old)
NID ID	GA01324

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: March 28, 2019

State Regulated: Yes

Regulatory Agency: GA-SAFE DAMS PROGRAM

Ownership

Dekalb County Natural Resources Management Office

Local Government

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Lake Windsor Dam

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Frequently Asked Questions

What is the hazard classification of Erin Lake Dam?

Erin Lake 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 Erin Lake Dam?

Erin Lake Dam is owned by Dekalb County Natural Resources Management Office (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Erin Lake Dam built?

Erin Lake Dam was completed in 1960, making it 66 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 Erin Lake Dam?

Erin Lake 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 Erin Lake Dam?

Erin Lake Dam has a dam height of 34 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 Erin Lake Dam last inspected?

Erin Lake Dam was last inspected on March 28, 2019. 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.