Little Tonoloway Dam

Little Tonoloway Creek· Washington, Maryland· Built 1953· Earth· 17 ft tall
Low Hazard Private

Key Takeaway

Little Tonoloway Dam is classified as low hazard in Maryland. It was completed in 1953 and is 73 years old.

Physical Details

Dam Height 17 ft (taller than 33.8% in MD)
Dam Length423 ft
Dam TypeEarth
Max Storage66 acre-ft
Normal Storage42 acre-ft
Surface Area8 acres
Drainage Area3 sq mi
Max Discharge810 cfs
Year Completed1953 (73 years old)
Year Modified1953
NID IDMD00062

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: May 10, 2016
State Regulated: Yes
Regulatory Agency: MD Dam Safety

Ownership

Tonolway Rod and Gun Club

Private

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Frequently Asked Questions

What is the hazard classification of Little Tonoloway Dam?

Little Tonoloway 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 Little Tonoloway Dam?

Little Tonoloway Dam is owned by Tonolway Rod and Gun Club (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Little Tonoloway Dam built?

Little Tonoloway Dam was completed in 1953, making it 73 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

How tall is Little Tonoloway Dam?

Little Tonoloway Dam has a dam height of 17 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 Little Tonoloway Dam last inspected?

Little Tonoloway Dam was last inspected on May 10, 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.