Glenn Forest Dam

TR-FOURMILE BRANCH· Spartanburg, South Carolina· Built 1990· 24 ft tall

High Hazard Recreation Private

Key Takeaway

Glenn Forest Dam is classified as high hazard in South Carolina. It was completed in 1990 and is 36 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	24 ft (taller than 59.6% in SC)
Max Storage	98 acre-ft
Normal Storage	48 acre-ft

Surface Area	5 acres
Year Completed	1990 (36 years old)
NID ID	SC02617

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: February 3, 2023

State Regulated: Yes

Regulatory Agency: SC DHEC

Ownership

GLEN FOREST LAKEOWNERS ASSOC

Private

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Pierce Dam

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L Cornwell Dam

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Henry Jacobs Dam

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Hillbrook Forest Lake Dam

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Park Lake Dam

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Frequently Asked Questions

What is the hazard classification of Glenn Forest Dam?

Glenn Forest 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 Glenn Forest Dam?

Glenn Forest Dam is owned by GLEN FOREST LAKEOWNERS ASSOC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Glenn Forest Dam built?

Glenn Forest Dam was completed in 1990, making it 36 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 Glenn Forest Dam?

Glenn Forest 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 Glenn Forest Dam?

Glenn Forest Dam has a dam height of 24 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 Glenn Forest Dam last inspected?

Glenn Forest Dam was last inspected on February 3, 2023. 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.