Healy
Healy is an earth dam located in Johnson County, Wyoming, built in 1975. It carries a High hazard potential classification.
About Healy
The primary purpose of Healy is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wyoming Water Development Commission (state). It impounds the Clear Creek near Ucross.
The dam stands 76 feet tall and stretches 8,900 feet across, creates a reservoir covering 246 acres, has a maximum storage capacity of 6,500 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1975, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 05/20/2025.
At 76 feet, this dam is taller than 97% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Wyoming dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Ucross |
| River/Stream | Clear Creek |
| Coordinates | 44.41660, -106.60380 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 76 ft |
| Dam Height | 50 ft |
| Dam Length | 8,900 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 6,500 acre-ft |
| Max Storage | 6,500 acre-ft |
| Normal Storage | 5,140 acre-ft |
| Surface Area | 246 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,800 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WYOMING WATER DEVELOPMENT COMMISSION |
| Owner Type | State |
| Hazard Classification | High |
| Last Inspection | 05/20/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WY01495 |
| Federal ID | WY01495 |
| More Info | State Dam Safety Program |