Upper Petit Jean Wid Site 9
Upper Petit Jean Wid Site 9 is an earth dam located in Logan County, Arkansas, built in 1978. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Upper Petit Jean Wid Site 9
The primary purpose of Upper Petit Jean Wid Site 9 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 Boonville Water Department (local government). It impounds the Washburn Creek near Barber.
The dam stands 84 feet tall and stretches 1,255 feet across, creates a reservoir covering 315 acres, has a maximum storage capacity of 29,200 acre-feet, and collects water from a drainage area of 31 square miles. Completed in 1978, the structure is 48 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 01/02/2025.
At 84 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 Arkansas 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 | Arkansas |
| County | Logan |
| Nearest City | Barber |
| River/Stream | Washburn Creek |
| Coordinates | 35.13906, -94.05804 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 84 ft |
| Dam Height | 75 ft |
| Dam Length | 1,255 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 29,200 acre-ft |
| Max Storage | 29,200 acre-ft |
| Normal Storage | 4,670 acre-ft |
| Surface Area | 315 acres |
| Drainage Area | 31 sq mi |
| Max Discharge | 43,657 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Boonville Water Department |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/02/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | AR01322 |
| Federal ID | AR01322 |
| More Info | State Dam Safety Program |