Moccasin Detention Dam

WILLOW CK./MILK RIVER· Valley, Montana· Built 1957· Gravity·
Low Hazard Fire Protection Stock Or Small Fish Pond Federal Government

Key Takeaway

Moccasin Detention Dam is classified as low hazard in Montana. It was completed in 1957 and is 69 years old. Its primary use is fire protection.

Physical Details

Dam Length808 ft
Dam TypeGravity
Max Storage420 acre-ft
Normal Storage507 acre-ft
Surface Area58 acres
Drainage Area8 sq mi
Year Completed1957 (69 years old)
NID IDMT00705

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 2, 2019
State Regulated: No

Ownership

DOI BLM

Federal Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Moccasin Detention Dam?

Moccasin Detention 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 Moccasin Detention Dam?

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

When was Moccasin Detention Dam built?

Moccasin Detention Dam was completed in 1957, making it 69 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 Moccasin Detention Dam?

Moccasin Detention Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was Moccasin Detention Dam last inspected?

Moccasin Detention Dam was last inspected on December 2, 2019. 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.