Rosean

ROSEAN DRAW· Weston, Wyoming· Built 1955· Earth· 23 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Rosean is classified as low hazard in Wyoming. It was completed in 1955 and is 71 years old. Its primary use is fire protection.

Physical Details

Dam Height 23 ft (taller than 32.5% in WY)
Dam Length900 ft
Dam TypeEarth
Max Storage117 acre-ft
Normal Storage53 acre-ft
Surface Area11 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1955 (71 years old)
NID IDWY00614

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: October 19, 2022
State Regulated: Yes
Regulatory Agency: SEO

Ownership

AGNES K. MORGAN

Private

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Frequently Asked Questions

What is the hazard classification of Rosean?

Rosean 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 Rosean?

Rosean is owned by AGNES K. MORGAN (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Rosean built?

Rosean was completed in 1955, making it 71 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 Rosean?

Rosean 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 Rosean?

Rosean has a dam height of 23 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 Rosean last inspected?

Rosean was last inspected on October 19, 2022. 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.