Clark No. 1

CLARK DRAW· Niobrara, Wyoming· Built 1956· Earth· 27 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Clark 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 27 ft (taller than 50.7% in WY)
Dam Length445 ft
Dam TypeEarth
Max Storage77 acre-ft
Normal Storage47 acre-ft
Surface Area5 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1956 (70 years old)
NID IDWY00517

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: November 19, 2019
State Regulated: Yes
Regulatory Agency: SEO

Ownership

JACK PFISTER RANCH

Private

Nearby Dams

Amelia No. 1

Niobrara, WY

Low Hazard 24 ft

Clark No. 1

Niobrara, WY

Low Hazard 25 ft

Longeley

Niobrara, WY

Low Hazard 22 ft

Griswold No. 1

Niobrara, WY

Low Hazard 25 ft

Rumney No. 2

Niobrara, WY

Low Hazard 29 ft

Mule Creek No. 1

Niobrara, WY

Low Hazard 27 ft

Leonard Degering

Niobrara, WY

Low Hazard 21 ft

Geiger

Niobrara, WY

Low Hazard 32 ft

Frequently Asked Questions

What is the hazard classification of Clark No. 1?

Clark 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 Clark No. 1?

Clark No. 1 is owned by JACK PFISTER RANCH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Clark No. 1 built?

Clark 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 Clark No. 1?

Clark 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 Clark No. 1?

Clark No. 1 has a dam height of 27 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 Clark No. 1 last inspected?

Clark No. 1 was last inspected on November 19, 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.