Joss

LANCE CREEK· Niobrara, Wyoming· Built 1918· Earth· 24 ft tall
Low Hazard Irrigation Private

Key Takeaway

Joss is classified as low hazard in Wyoming. It was completed in 1918 and is 108 years old. Its primary use is irrigation.

Physical Details

Dam Height 24 ft (taller than 35.6% in WY)
Dam Length1,060 ft
Dam TypeEarth
Max Storage538 acre-ft
Normal Storage375 acre-ft
Surface Area50 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1918 (108 years old)
NID IDWY00968

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: May 3, 2023
State Regulated: Yes
Regulatory Agency: SEO

Ownership

E BAR C LIMITED PARTNERSHIP

Private

Nearby Dams

Lance Creek No. 2

Niobrara, WY

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Bliss No. 1

Niobrara, WY

Low Hazard 33 ft

Lance Creek No. 1

Niobrara, WY

Low Hazard 26 ft

Mosier No. 1

Niobrara, WY

Low Hazard 22 ft

Bast No. 1 Stock

Niobrara, WY

Low Hazard 29 ft

Magoon No. 1

Niobrara, WY

Low Hazard 25 ft

Carrico No. 1

Niobrara, WY

Low Hazard 27 ft

Frequently Asked Questions

What is the hazard classification of Joss?

Joss 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 Joss?

Joss is owned by E BAR C LIMITED PARTNERSHIP (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Joss built?

Joss was completed in 1918, making it 108 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 Joss?

Joss 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 Joss?

Joss has a dam height of 24 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 Joss last inspected?

Joss was last inspected on May 3, 2023. 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.