Polo

HANNA CREEK· Sheridan, Wyoming· Built 1999· Earth· 26 ft tall
Low Hazard Irrigation Fire Protection Stock Or Small Fish Pond Fish And Wildlife Pond Private

Key Takeaway

Polo is classified as low hazard in Wyoming. It was completed in 1999 and is 27 years old. Its primary use is irrigation.

Physical Details

Dam Height 26 ft (taller than 46.3% in WY)
Dam Length1,160 ft
Dam TypeEarth
Max Storage134 acre-ft
Normal Storage95 acre-ft
Surface Area10 acres
Drainage Area3 sq mi
Max Discharge1,970 cfs
Year Completed1999 (27 years old)
NID IDWY02123

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

JAN PAMELA POLO RANCH, LLC

Private

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Frequently Asked Questions

What is the hazard classification of Polo?

Polo 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 Polo?

Polo is owned by JAN PAMELA POLO RANCH, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Polo built?

Polo was completed in 1999, making it 27 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 Polo?

Polo serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Polo?

Polo has a dam height of 26 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 Polo last inspected?

Polo 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.