Johnson Lake Dam

Gwinnett, Georgia· Earth· 26 ft tall
Low Hazard Recreation Private

Key Takeaway

Johnson Lake Dam is classified as low hazard in Georgia. Its primary use is recreation.

Physical Details

Dam Height 26 ft (taller than 62.1% in GA)
Dam Length310 ft
Dam TypeEarth
Max Storage29 acre-ft
Normal Storage20 acre-ft
Surface Area2 acres
Drainage Area0 sq mi
NID IDGA05739

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: July 13, 2016
State Regulated: No

Ownership

Johnson,H.W.

Private

Nearby Dams

Hughes Lake Dam

Gwinnett, GA

Low Hazard 33 ft

Sugarloaf Lake Dam

Gwinnett, GA

High Hazard 34 ft

Sugarloaf Lake Dam #5a

Gwinnett, GA

Unknown 29 ft

Rc&D Watershed Structure Y-14

Gwinnett, GA

High Hazard 40 ft

Sugar Loaf #2 B

Gwinnett, GA

Low Hazard 25 ft

Sugar Loaf Dam 3 B

Gwinnett, GA

Low Hazard 23 ft

Lake Louella Dam

Gwinnett, GA

High Hazard 30 ft

Lionel Lake Dam

Gwinnett, GA

Low Hazard 27 ft

Frequently Asked Questions

What is the hazard classification of Johnson Lake Dam?

Johnson Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Johnson Lake Dam?

Johnson Lake Dam is owned by Johnson,H.W. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Johnson Lake Dam?

Johnson 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 Johnson Lake Dam?

Johnson Lake Dam has a dam height of 26 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 Johnson Lake Dam last inspected?

Johnson Lake Dam was last inspected on July 13, 2016. 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.