Jeff Davis is an earth dam located in Calaveras County, California, built in 1973. It carries a High hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 114 ft114 ft tall and 102 ft long, taller than 98% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Jeff Davis
The primary purpose of Jeff Davis 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 Calaveras Public Utility District (public utility). It impounds the Tr Wet Gulch Crk.
The dam stands 114 feet tall and stretches 102 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 2,059 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1973, 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 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 02/26/2025.
At 114 feet, this dam is taller than 98% of all dams in the United States.
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 California 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 | California |
| County | Calaveras |
| River/Stream | Tr Wet Gulch Crk |
| Coordinates | 38.34390, -120.54060 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 114 ft |
| Dam Height | 114 ft |
| Dam Length | 102 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 2,059 acre-ft |
| Max Storage | 2,059 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Calaveras Public Utility District |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/26/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00309 |
| Federal ID | CA00309 |
| More Info | State Dam Safety Program |