Upper 4s Ranch
California — San Diego County — Lusardi Creek
Location
| State | California |
| County | San Diego |
| River | Lusardi Creek |
| Coordinates | 33.00050, -117.10350 |
Physical Characteristics
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 246 ft |
| NID Storage | 48 acre-ft |
| Max Storage | 48 acre-ft |
| Surface Area | 10 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Satisfactory |
| EAP Status | No |
| Last Inspection | April 23, 2025 |
| Inspection Frequency | 0.5 |
Dam Information
| Year Completed | 1927 |
| Primary Purpose | Water Supply |
| Dam Type | Arch |
| Owner Type | Private |
| Owner | 4S Ranch Master Association |
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.