Orchard Lake Dam
Orchard Lake Dam is an earth dam located in Adair County, Oklahoma, built in 1970. It carries a High hazard potential classification and has a poor condition assessment.
About Orchard Lake Dam
The primary purpose of Orchard Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by John And Shirley Auffet (private). It impounds the Tr-evansville Creek near Baron.
The dam stands 35 feet tall and stretches 2,830 feet across, creates a reservoir covering 24 acres, has a maximum storage capacity of 695 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 03/31/2021.
At 35 feet, this dam is taller than 82% of dams nationwide.
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 Oklahoma 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 | Oklahoma |
| County | Adair |
| Nearest City | Baron |
| River/Stream | Tr-evansville Creek |
| Coordinates | 35.80557, -94.59507 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 2,830 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 695 acre-ft |
| Max Storage | 695 acre-ft |
| Normal Storage | 225 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 3,120 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | JOHN AND SHIRLEY AUFFET |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 03/31/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK11040 |
| Federal ID | OK11040 |
| More Info | State Dam Safety Program |