Autumn Ridge Detention Dam

Shanahan Drain· Macomb, Michigan· Built 1982· Earth· 11 ft tall
Significant Hazard Other Local Government

Key Takeaway

Autumn Ridge Detention Dam is classified as significant hazard in Michigan. It was completed in 1982 and is 44 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 11 ft (taller than 26.9% in MI)
Dam Length34 ft
Dam TypeEarth
Max Storage23 acre-ft
Normal Storage0 acre-ft
Surface Area1 acres
Drainage Area0 sq mi
Max Discharge400 cfs
Year Completed1982 (44 years old)
NID IDMI02425

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 6, 1982
State Regulated: No

Ownership

Macomb County

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Autumn Ridge Detention Dam?

Autumn Ridge Detention 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 Autumn Ridge Detention Dam?

Autumn Ridge Detention Dam is owned by Macomb County (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Autumn Ridge Detention Dam built?

Autumn Ridge Detention Dam was completed in 1982, making it 44 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 Autumn Ridge Detention Dam?

Autumn Ridge Detention Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Autumn Ridge Detention Dam?

Autumn Ridge Detention Dam has a dam height of 11 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 Autumn Ridge Detention Dam last inspected?

Autumn Ridge Detention Dam was last inspected on July 6, 1982. 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.