Neelsville Estates Dam

OS-TR-Great Seneca Creek· Montgomery, Maryland· Built 1995· Earth· 15 ft tall
Significant Hazard Flood Risk Reduction Private

Key Takeaway

Neelsville Estates Dam is classified as significant hazard in Maryland. It was completed in 1995 and is 31 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 15 ft (taller than 21.8% in MD)
Dam Length300 ft
Dam TypeEarth
Normal Storage14 acre-ft
Surface Area1 acres
Drainage Area0 sq mi
Year Completed1995 (31 years old)
Year Modified1995
NID IDMD00510

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

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

Emergency Action Plan: No
Last Inspection: July 2, 2020
State Regulated: Yes
Regulatory Agency: MD Dam Safety

Ownership

Neelsville Estate Community Association INC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Neelsville Estates Dam?

Neelsville Estates Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Neelsville Estates Dam?

Neelsville Estates Dam is owned by Neelsville Estate Community Association INC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Neelsville Estates Dam built?

Neelsville Estates Dam was completed in 1995, making it 31 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 Neelsville Estates Dam?

Neelsville Estates Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Neelsville Estates Dam?

Neelsville Estates Dam has a dam height of 15 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 Neelsville Estates Dam last inspected?

Neelsville Estates Dam was last inspected on July 2, 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.