Jones Ranch
Jones Ranch is an earth dam located in Trinity County, California, built in 1980. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Jones Ranch
The primary purpose of Jones Ranch 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 Blue Planet, Llc (private). It impounds the Tr Trinity River.
The dam stands 36 feet tall and stretches 350 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 58 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1980, the structure is 46 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 05/07/2025.
At 36 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | California |
| County | Trinity |
| River/Stream | Tr Trinity River |
| Coordinates | 40.80220, -123.49370 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 350 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 58 acre-ft |
| Max Storage | 58 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Blue Planet, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/07/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01258 |
| Federal ID | CA01258 |
| More Info | State Dam Safety Program |