Innes Dam

UNNAMED DRAINAGE· Prairie, Montana· Gravity·
Low Hazard Federal Government

Key Takeaway

Innes Dam is classified as low hazard in Montana.

Physical Details

Dam Length464 ft
Dam TypeGravity
Max Storage60 acre-ft
Normal Storage0 acre-ft
Surface Area10 acres
Drainage Area5 sq mi
NID IDMT00665

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: September 5, 2018
State Regulated: No

Ownership

DOI BLM

Federal Government

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Nefsy #3

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Saucer #2

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Mcclure Detention Dam

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Homestead Retention Dam

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Terry Sewage Ponds

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Saucer #3

Prairie, MT

Low Hazard 20 ft

Hines #2

Prairie, MT

Low Hazard 17 ft

Frequently Asked Questions

What is the hazard classification of Innes Dam?

Innes 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 Innes Dam?

Innes Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Innes Dam last inspected?

Innes Dam was last inspected on September 5, 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.