Windmill No. 1

SOUTH FORK WINDMILL DRAW· Niobrara, Wyoming· Built 1956· Earth· 50 ft tall

Key Takeaway

Windmill No. 1 is classified as low hazard in Wyoming. It was completed in 1956 and is 70 years old. Its primary use is fire protection.

Physical Details

Dam Height 50 ft (taller than 93.6% in WY)
Dam Length763 ft
Dam TypeEarth
Max Storage649 acre-ft
Normal Storage490 acre-ft
Surface Area29 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1956 (70 years old)
NID IDWY00440

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 30, 2022
State Regulated: Yes
Regulatory Agency: SEO

Ownership

D & W LIVESTOCK COMPANY, INC.

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Windmill No. 1?

Windmill No. 1 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 Windmill No. 1?

Windmill No. 1 is owned by D & W LIVESTOCK COMPANY, INC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Windmill No. 1 built?

Windmill No. 1 was completed in 1956, making it 70 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 Windmill No. 1?

Windmill No. 1 serves the following purposes: 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 Windmill No. 1?

Windmill No. 1 has a dam height of 50 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 Windmill No. 1 last inspected?

Windmill No. 1 was last inspected on August 30, 2022. 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.