Hanna Pilot Reservoir

HANNA DRAW· Carbon, Wyoming· Built 2001· Earth· 22 ft tall
Low Hazard Other Private

Key Takeaway

Hanna Pilot Reservoir is classified as low hazard in Wyoming. It was completed in 2001 and is 25 years old. Its primary use is other.

Physical Details

Dam Height 22 ft (taller than 28.8% in WY)
Dam Length1,077 ft
Dam TypeEarth
Max Storage755 acre-ft
Normal Storage500 acre-ft
Surface Area46 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed2001 (25 years old)
NID IDWY02275

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 8, 2020
State Regulated: Yes
Regulatory Agency: SEO

Ownership

ANADARKO LAND CORPORATION

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Hanna Pilot Reservoir?

Hanna Pilot Reservoir 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 Hanna Pilot Reservoir?

Hanna Pilot Reservoir is owned by ANADARKO LAND CORPORATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Hanna Pilot Reservoir built?

Hanna Pilot Reservoir was completed in 2001, making it 25 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 Hanna Pilot Reservoir?

Hanna Pilot Reservoir serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Hanna Pilot Reservoir?

Hanna Pilot Reservoir has a dam height of 22 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 Hanna Pilot Reservoir last inspected?

Hanna Pilot Reservoir was last inspected on May 8, 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.