Winchester

GASSETT DRAW· Johnson, Wyoming· Built 1961· Earth· 35 ft tall
Low Hazard Irrigation Private

Key Takeaway

Winchester is classified as low hazard in Wyoming. It was completed in 1961 and is 65 years old. Its primary use is irrigation.

Physical Details

Dam Height 35 ft (taller than 78.8% in WY)
Dam Length1,070 ft
Dam TypeEarth
Max Storage566 acre-ft
Normal Storage330 acre-ft
Surface Area39 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1961 (65 years old)
NID IDWY00792

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: August 1, 2019
State Regulated: Yes
Regulatory Agency: SEO

Ownership

WINCHESTER PLACE PROPERTY TRUST AGREEMENT

Private

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Frequently Asked Questions

What is the hazard classification of Winchester?

Winchester 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 Winchester?

Winchester is owned by WINCHESTER PLACE PROPERTY TRUST AGREEMENT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Winchester built?

Winchester was completed in 1961, making it 65 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 Winchester?

Winchester serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Winchester?

Winchester has a dam height of 35 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 Winchester last inspected?

Winchester was last inspected on August 1, 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.