Tie Hack
Tie Hack is a concrete dam located in Johnson County, Wyoming, built in 1997. It carries a High hazard potential classification and has a fair condition assessment.
About Tie Hack
The primary purpose of Tie Hack is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Buffalo (local government). It impounds the South Fork Clear Creek near Buffalo.
The dam stands 110 feet tall and stretches 500 feet across, creates a reservoir covering 63 acres, has a storage capacity of 2,435 acre-feet, and collects water from a drainage area of 40 square miles. Completed in 1997, the structure is 29 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 06/29/2023.
At 110 feet, this dam is taller than 98% 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 | Buffalo |
| River/Stream | South Fork Clear Creek |
| Coordinates | 44.28562, -106.92148 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 110 ft |
| Dam Height | 110 ft |
| Dam Length | 500 ft |
| Year Completed | 1997 (29 years old) |
Storage & Hydraulics
| NID Storage | 2,435 acre-ft |
| Normal Storage | 2,435 acre-ft |
| Surface Area | 63 acres |
| Drainage Area | 40 sq mi |
| Max Discharge | 1,957 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF BUFFALO |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 06/29/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WY02030 |
| Federal ID | WY02030 |
| More Info | State Dam Safety Program |