Hancock Sewage Lagoon

Offstream-Tonoloway Creek· Washington, Maryland· Built 1963· Earth· 8 ft tall
Low Hazard Local Government

Key Takeaway

Hancock Sewage Lagoon is classified as low hazard in Maryland. It was completed in 1963 and is 63 years old.

Physical Details

Dam Height 8 ft (taller than 1.2% in MD)
Dam Length2,000 ft
Dam TypeEarth
Max Storage115 acre-ft
Normal Storage38 acre-ft
Surface Area13 acres
Drainage Area0 sq mi
Max Discharge340 cfs
Year Completed1963 (63 years old)
Year Modified1963
NID IDMD00096

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: April 11, 2018
State Regulated: Yes
Regulatory Agency: MD Dam Safety

Ownership

Town of Hancock

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Hancock Sewage Lagoon?

Hancock Sewage Lagoon 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 Hancock Sewage Lagoon?

Hancock Sewage Lagoon is owned by Town of Hancock (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Hancock Sewage Lagoon built?

Hancock Sewage Lagoon was completed in 1963, making it 63 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

How tall is Hancock Sewage Lagoon?

Hancock Sewage Lagoon has a dam height of 8 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 Hancock Sewage Lagoon last inspected?

Hancock Sewage Lagoon was last inspected on April 11, 2018. 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.