Glades

SOUTH BRANCH SLIPPERY ROCK CR· Butler, Pennsylvania· Built 1974· Earth· 24 ft tall

High Hazard Recreation State Government

Key Takeaway

Glades is classified as high hazard in Pennsylvania. It was completed in 1974 and is 52 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 52.7% in PA)
Dam Length	960 ft
Dam Type	Earth
Max Storage	8.6K acre-ft
Normal Storage	1.4K acre-ft

Surface Area	390 acres
Drainage Area	23 sq mi
Year Completed	1974 (52 years old)
NID ID	PA00804

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: November 20, 2020

State Regulated: Yes

Regulatory Agency: Pennsylvania Department of Environmental Protection

Ownership

PA GAME COMMISSION

State Government

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Frequently Asked Questions

What is the hazard classification of Glades?

Glades 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 Glades?

Glades is owned by PA GAME COMMISSION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Glades built?

Glades was completed in 1974, making it 52 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 Glades?

Glades 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 Glades?

Glades 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 Glades last inspected?

Glades was last inspected on November 20, 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.