Zezas Irrigation

COLORADO FLATS DRAW· Johnson, Wyoming· Built 1973· Earth· 39 ft tall
Low Hazard Irrigation Private

Key Takeaway

Zezas Irrigation is classified as low hazard in Wyoming. It was completed in 1973 and is 53 years old. Its primary use is irrigation.

Physical Details

Dam Height 39 ft (taller than 85.9% in WY)
Dam Length1,120 ft
Dam TypeEarth
Max Storage965 acre-ft
Normal Storage665 acre-ft
Surface Area56 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1973 (53 years old)
Year Modified2010
NID IDWY01038

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

JOHN ZEZAS & SONS RANCH INC.

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Zezas Irrigation?

Zezas Irrigation 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 Zezas Irrigation?

Zezas Irrigation is owned by JOHN ZEZAS & SONS RANCH INC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Zezas Irrigation built?

Zezas Irrigation was completed in 1973, making it 53 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 Zezas Irrigation?

Zezas Irrigation 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 Zezas Irrigation?

Zezas Irrigation has a dam height of 39 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 Zezas Irrigation last inspected?

Zezas Irrigation 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.