Koehn Ranch Reservoir
Koehn Ranch Reservoir is an earth dam located in Grant County, Washington, built in 2009. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Koehn Ranch Reservoir
The primary purpose of Koehn Ranch Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Zirkle Fruit Company (private).
The dam stands 19 feet tall and stretches 900 feet across, creates a reservoir covering 2 acres, and has a maximum storage capacity of 20 acre-feet. Completed in 2009, the structure is relatively new.
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 11/15/2021.
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 Washington 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 | Washington |
| County | Grant |
| Coordinates | 46.93781, -119.47087 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Length | 900 ft |
| Year Completed | 2009 (17 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Zirkle Fruit Company |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/15/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA01971 |
| Federal ID | WA01971 |
| More Info | State Dam Safety Program |