Galloping Jack

TROTTING HARE DRAW· Johnson, Wyoming· Built 2006· Earth· 37 ft tall

Key Takeaway

Galloping Jack is classified as low hazard in Wyoming. It was completed in 2006 and is 20 years old. Its primary use is irrigation.

Physical Details

Dam Height 37 ft (taller than 83.1% in WY)
Dam Length836 ft
Dam TypeEarth
Max Storage90 acre-ft
Normal Storage71 acre-ft
Surface Area5 acres
Drainage Area0 sq mi
Max Discharge497 cfs
Year Completed2006 (20 years old)
NID IDWY02486

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: July 2, 2019
State Regulated: Yes
Regulatory Agency: SEO

Ownership

IBERLIN RANCH

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Galloping Jack?

Galloping Jack 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 Galloping Jack?

Galloping Jack is owned by IBERLIN RANCH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Galloping Jack built?

Galloping Jack was completed in 2006, making it 20 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 Galloping Jack?

Galloping Jack serves the following purposes: Irrigation, 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 Galloping Jack?

Galloping Jack has a dam height of 37 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 Galloping Jack last inspected?

Galloping Jack was last inspected on July 2, 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.