Kona Ranch
Kona Ranch is an earth dam located in Missoula County, Montana, built in 1959. It carries a Significant hazard potential classification.
About Kona Ranch
The primary purpose of Kona Ranch is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Kona Ranch (private). It impounds the Tr-clark Fork River near Alberton.
The dam stands 29 feet tall and stretches 325 feet across, has a maximum storage capacity of 65 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.
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Location
| State | Montana |
| County | Missoula |
| Nearest City | Alberton |
| River/Stream | Tr-clark Fork River |
| Coordinates | 46.88784, -114.12497 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 325 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 65 acre-ft |
| Max Storage | 65 acre-ft |
| Normal Storage | 50 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 118 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | KONA RANCH |
| Owner Type | Private |
| Hazard Classification | Significant |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01149 |
| Federal ID | MT01149 |
| More Info | State Dam Safety Program |