South Wall No. 3

SOUTHWALL NO 3 DRAW· Natrona, Wyoming· Built 1951· Earth· 25 ft tall
Low Hazard Irrigation Private

Key Takeaway

South Wall No. 3 is classified as low hazard in Wyoming. It was completed in 1951 and is 75 years old. Its primary use is irrigation.

Physical Details

Dam Height 25 ft (taller than 39.5% in WY)
Dam Length420 ft
Dam TypeEarth
Max Storage50 acre-ft
Normal Storage24 acre-ft
Surface Area4 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1951 (75 years old)
NID IDWY00507

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 27, 2021
State Regulated: Yes
Regulatory Agency: SEO

Ownership

ANTELOPE SPRINGS RANCH CO

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of South Wall No. 3?

South Wall No. 3 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 South Wall No. 3?

South Wall No. 3 is owned by ANTELOPE SPRINGS RANCH CO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was South Wall No. 3 built?

South Wall No. 3 was completed in 1951, making it 75 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 South Wall No. 3?

South Wall No. 3 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 South Wall No. 3?

South Wall No. 3 has a dam height of 25 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 South Wall No. 3 last inspected?

South Wall No. 3 was last inspected on May 27, 2021. 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.