Robertson

TERRY DRAW· Johnson, Wyoming· Built 1970· Earth· 28 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Robertson is classified as low hazard in Wyoming. It was completed in 1970 and is 56 years old. Its primary use is fire protection.

Physical Details

Dam Height 28 ft (taller than 55% in WY)
Dam Length408 ft
Dam TypeEarth
Max Storage74 acre-ft
Normal Storage41 acre-ft
Surface Area6 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1970 (56 years old)
NID IDWY00510

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: May 12, 2020
State Regulated: Yes
Regulatory Agency: SEO

Ownership

48 RANCH C/O BEN SCHIFFER

Private

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North Jack Rabbit

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Leslie No. 2

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Will No. 1

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Peterson

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Austin No. 1

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Posy No. 1

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Low Hazard 51 ft

Frequently Asked Questions

What is the hazard classification of Robertson?

Robertson 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 Robertson?

Robertson is owned by 48 RANCH C/O BEN SCHIFFER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Robertson built?

Robertson was completed in 1970, making it 56 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 Robertson?

Robertson 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 Robertson?

Robertson has a dam height of 28 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 Robertson last inspected?

Robertson was last inspected on May 12, 2020. 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.