Goffinet
Goffinet is an earth dam located in Amador County, California, built in 1954. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Goffinet
Goffinet is a dam in Amador, California. The dam is owned by Dave Maiero (private). It impounds the Jackass Creek near Ione, Ca.
The dam stands 38 feet tall and stretches 585 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 197 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1954, 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 03/21/2025.
At 38 feet, this dam is taller than 85% 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 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 | Amador |
| Nearest City | Ione, Ca |
| River/Stream | Jackass Creek |
| Coordinates | 38.37790, -120.88450 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 585 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 197 acre-ft |
| Max Storage | 197 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Dave Maiero |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/21/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00612 |
| Federal ID | CA00612 |
| More Info | State Dam Safety Program |