Letz Lake

TR-DRY FORK MARIAS RIVER· Pondera, Montana· Built 1952· Earth· 30 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Letz Lake is classified as low hazard in Montana. It was completed in 1952 and is 74 years old. Its primary use is fire protection.

Physical Details

Dam Height 30 ft (taller than 82.7% in MT)
Dam Length140 ft
Dam TypeEarth
Max Storage34 acre-ft
Normal Storage15 acre-ft
Drainage Area2 sq mi
Max Discharge90 cfs
Year Completed1952 (74 years old)
NID IDMT01537

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: January 1, 1952
State Regulated: Yes
Regulatory Agency: DNRC

Ownership

NICK G LETZ

Private

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Keil Ranch Reservoir #1

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Dato

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Rigby, South

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Marias Hereford Ranch #30

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Frequently Asked Questions

What is the hazard classification of Letz Lake?

Letz Lake 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 Letz Lake?

Letz Lake is owned by NICK G LETZ (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Letz Lake built?

Letz Lake was completed in 1952, making it 74 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 Letz Lake?

Letz Lake 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 Letz Lake?

Letz Lake has a dam height of 30 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 Letz Lake last inspected?

Letz Lake was last inspected on January 1, 1952. 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.