Colliersville

North Branch Susquehanna River· Otsego, New York· Built 1908· Concrete· 35 ft tall

High Hazard Hydroelectric Recreation Not Listed

Key Takeaway

Colliersville is classified as high hazard in New York. It was completed in 1908 and is 118 years old. Its primary use is hydroelectric. 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	35 ft (taller than 83.6% in NY)
Dam Length	324 ft
Dam Type	Concrete
Max Storage	7.8K acre-ft
Normal Storage	7.8K acre-ft

Surface Area	364 acres
Drainage Area	351 sq mi
Max Discharge	11,600 cfs
Year Completed	1908 (118 years old)
NID ID	NY00685

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: October 11, 2022

State Regulated: No

Ownership

Not Listed

Nearby Dams

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John Crane Dam

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Holbrook Pond Dam

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Gilbert Lake Dam

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Gerrit Lydecker Pond Dam

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Frequently Asked Questions

What is the hazard classification of Colliersville?

Colliersville 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 Colliersville?

Colliersville is owned by information not available (Not Listed). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Colliersville built?

Colliersville was completed in 1908, making it 118 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 Colliersville?

Colliersville serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Colliersville?

Colliersville has a dam height of 35 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 Colliersville last inspected?

Colliersville was last inspected on October 11, 2022. 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.