Pollux

SLIDE OUT COULEE· Chouteau, Montana· Built 1960· Earth· 25 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Pollux is classified as low hazard in Montana. It was completed in 1960 and is 66 years old. Its primary use is fire protection.

Physical Details

Dam Height 25 ft (taller than 70.3% in MT)
Dam Length350 ft
Dam TypeEarth
Max Storage47 acre-ft
Normal Storage28 acre-ft
Year Completed1960 (66 years old)
NID IDMT03521

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
State Regulated: Yes
Regulatory Agency: DNRC

Ownership

LAZY K-6 RANCH INC

Private

Nearby Dams

Djokjakarta

Chouteau, MT

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Diogenes

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Low Hazard 25 ft

Dioscuri

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Low Hazard 15 ft

Sweet Pea

Chouteau, MT

Low Hazard 20 ft

Vielleux, Joe

Chouteau, MT

Low Hazard 20 ft

Castor (Choteau)

Chouteau, MT

Low Hazard 20 ft

Squiggles #2

Chouteau, MT

Low Hazard 15 ft

Squiggles #1

Chouteau, MT

Low Hazard 25 ft

Frequently Asked Questions

What is the hazard classification of Pollux?

Pollux 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 Pollux?

Pollux is owned by LAZY K-6 RANCH INC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Pollux built?

Pollux was completed in 1960, making it 66 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 Pollux?

Pollux 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.

How tall is Pollux?

Pollux has a dam height of 25 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.

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.