Sheepshed Detention Dam

WILLOW CK./MILK RIVER· Valley, Montana· Built 1954· Gravity·
Low Hazard Flood Risk Reduction Federal Government

Key Takeaway

Sheepshed Detention Dam is classified as low hazard in Montana. It was completed in 1954 and is 72 years old. Its primary use is flood risk reduction.

Physical Details

Dam Length1,410 ft
Dam TypeGravity
Max Storage343 acre-ft
Normal Storage0 acre-ft
Surface Area57 acres
Drainage Area5 sq mi
Year Completed1954 (72 years old)
Year Modified1954
NID IDMT00694

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 Sheepshed Detention Dam?

Sheepshed 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 Sheepshed Detention Dam?

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

When was Sheepshed Detention Dam built?

Sheepshed Detention Dam was completed in 1954, making it 72 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 Sheepshed Detention Dam?

Sheepshed Detention Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was Sheepshed Detention Dam last inspected?

Sheepshed 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.