Will No. 1

WILL DRAW· Johnson, Wyoming· Built 1991· Earth· 30 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Will No. 1 is classified as low hazard in Wyoming. It was completed in 1991 and is 35 years old. Its primary use is fire protection.

Physical Details

Dam Height 30 ft (taller than 63.1% in WY)
Dam Length410 ft
Dam TypeEarth
Max Storage302 acre-ft
Normal Storage172 acre-ft
Surface Area19 acres
Drainage Area0 sq mi
Max Discharge3,360 cfs
Year Completed1991 (35 years old)
NID IDWY02098

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 1, 2019
State Regulated: Yes
Regulatory Agency: SEO

Ownership

TTT RANCH CORP

Private

Nearby Dams

Leslie No. 2

Johnson, WY

Low Hazard 24 ft

Austin No. 1

Johnson, WY

Low Hazard 22 ft

Posy No. 1

Johnson, WY

Low Hazard 51 ft

South Wall

Natrona, WY

Low Hazard 20 ft

South Wall No. 3

Natrona, WY

Low Hazard 25 ft

Turkey Springs

Natrona, WY

Low Hazard 29 ft

Bass Pond

Johnson, WY

Low Hazard 31 ft

Robertson

Johnson, WY

Low Hazard 28 ft

Frequently Asked Questions

What is the hazard classification of Will No. 1?

Will 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 Will No. 1?

Will No. 1 is owned by TTT RANCH CORP (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Will No. 1 built?

Will No. 1 was completed in 1991, making it 35 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 Will No. 1?

Will 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 Will No. 1?

Will No. 1 has a dam height of 30 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 Will No. 1 last inspected?

Will No. 1 was last inspected on July 1, 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.