Lake Ralphine
California — Sonoma County — Tr Santa Rosa Cr
Location
| State | California |
| County | Sonoma |
| River | Tr Santa Rosa Cr |
| Coordinates | 38.45490, -122.67000 |
Physical Characteristics
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 700 ft |
| NID Storage | 387 acre-ft |
| Max Storage | 387 acre-ft |
| Surface Area | 19 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | June 5, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1882 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | City of Santa Rosa |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.