Mcmaster No. 4

NIOBRARA RIVER· Niobrara, Wyoming· Built 1966· Earth· 14 ft tall

Key Takeaway

Mcmaster No. 4 is classified as low hazard in Wyoming. It was completed in 1966 and is 60 years old. Its primary use is irrigation.

Physical Details

Dam Height 14 ft (taller than 8.9% in WY)
Dam Length470 ft
Dam TypeEarth
Max Storage248 acre-ft
Normal Storage103 acre-ft
Surface Area23 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1966 (60 years old)
NID IDWY00196

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 30, 2020
State Regulated: Yes
Regulatory Agency: SEO

Ownership

VAN TASSEL RANCH CORP. - NORMA BRUEGGER

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Mcmaster No. 4?

Mcmaster No. 4 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 Mcmaster No. 4?

Mcmaster No. 4 is owned by VAN TASSEL RANCH CORP. - NORMA BRUEGGER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Mcmaster No. 4 built?

Mcmaster No. 4 was completed in 1966, making it 60 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 Mcmaster No. 4?

Mcmaster No. 4 serves the following purposes: Irrigation, 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 Mcmaster No. 4?

Mcmaster No. 4 has a dam height of 14 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 Mcmaster No. 4 last inspected?

Mcmaster No. 4 was last inspected on July 30, 2020. 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.