Goodwin
Goodwin is a multi-arch dam located in Calaveras County, California, built in 1912. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Goodwin
Goodwin is a dam in Calaveras, California. The dam is owned by Tri-dam Project (public utility). It impounds the Stanislaus Rv near Khts Ferry.
The dam stands 101 feet tall and stretches 460 feet across, creates a reservoir covering 70 acres, has a maximum storage capacity of 500 acre-feet, and collects water from a drainage area of 996 square miles. Completed in 1912, the structure is over a century 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 11/20/2024.
At 101 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 |
| Nearest City | Khts Ferry |
| River/Stream | Stanislaus Rv |
| Coordinates | 37.86330, -120.63030 |
Physical Characteristics
| Dam Type | Multi-Arch |
| NID Height | 101 ft |
| Dam Height | 101 ft |
| Dam Length | 460 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Surface Area | 70 acres |
| Drainage Area | 996 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Tri-Dam Project |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/20/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00260 |
| Federal ID | CA00260 |
| More Info | State Dam Safety Program |