Petit Jean Water Supply
Petit Jean Water Supply is an earth dam located in Conway County, Arkansas, built in 1959. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Petit Jean Water Supply
The primary purpose of Petit Jean Water Supply 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 Arkansas Parks And Tourism (state). It impounds the Cedar Creek-os near Petit Jean St Park.
The dam stands 29 feet tall and stretches 600 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 210 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/05/2025.
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Location
| State | Arkansas |
| County | Conway |
| Nearest City | Petit Jean St Park |
| River/Stream | Cedar Creek-os |
| Coordinates | 35.12500, -92.92056 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 600 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 210 acre-ft |
| Max Storage | 210 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,600 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Arkansas Parks and Tourism |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/05/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR00349 |
| Federal ID | AR00349 |
| More Info | State Dam Safety Program |