Moonan Marsh

Crane Creek· Waseca, Minnesota· Built 1967· Earth· 9 ft tall
Low Hazard Fish And Wildlife Pond Local Government

Key Takeaway

Moonan Marsh is classified as low hazard in Minnesota. It was completed in 1967 and is 59 years old. Its primary use is fish and wildlife pond.

Physical Details

Dam Height 9 ft (taller than 25.1% in MN)
Dam Length20 ft
Dam TypeEarth
Max Storage150 acre-ft
Normal Storage100 acre-ft
Drainage Area33 sq mi
Max Discharge50 cfs
Year Completed1967 (59 years old)
NID IDMN00555

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: December 8, 2015
State Regulated: Yes
Regulatory Agency: MNDNR EWR

Ownership

County of Waseca

Local Government

Nearby Dams

Watkins Lake

Waseca, MN

Unknown 4 ft

Clear Lake

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Low Hazard 8 ft

Swan Lake

Steele, MN

Low Hazard 7 ft

Morristown Pond

Rice, MN

Low Hazard 10 ft

Morehouse Park

Steele, MN

Low Hazard 8 ft

Maas Detention

Rice, MN

Low Hazard 30 ft

Frequently Asked Questions

What is the hazard classification of Moonan Marsh?

Moonan Marsh 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 Moonan Marsh?

Moonan Marsh is owned by County of Waseca (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Moonan Marsh built?

Moonan Marsh was completed in 1967, making it 59 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 Moonan Marsh?

Moonan Marsh serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Moonan Marsh?

Moonan Marsh has a dam height of 9 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 Moonan Marsh last inspected?

Moonan Marsh was last inspected on December 8, 2015. 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.