Lake Mckinney

MCKINNEY CR, TRIB GREYBULL RIV· Big Horn, Wyoming· Built 1939· Earth· 26 ft tall

Key Takeaway

Lake Mckinney is classified as low hazard in Wyoming. It was completed in 1939 and is 87 years old. Its primary use is irrigation.

Physical Details

Dam Height 26 ft (taller than 46.3% in WY)
Dam Length735 ft
Dam TypeEarth
Max Storage550 acre-ft
Normal Storage305 acre-ft
Surface Area41 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1939 (87 years old)
NID IDWY01163

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: June 23, 2022
State Regulated: Yes
Regulatory Agency: SEO

Ownership

JOHN J. BULLINGER & SONS INC.

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Lake Mckinney?

Lake Mckinney 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 Lake Mckinney?

Lake Mckinney is owned by JOHN J. BULLINGER & SONS INC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Lake Mckinney built?

Lake Mckinney was completed in 1939, making it 87 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 Lake Mckinney?

Lake Mckinney 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 Lake Mckinney?

Lake Mckinney has a dam height of 26 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 Lake Mckinney last inspected?

Lake Mckinney was last inspected on June 23, 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.