Chino Ranch #1
California — San Bernardino County — Tonner Canyon Cr
Location
| State | California |
| County | San Bernardino |
| River | Tonner Canyon Cr |
| Coordinates | 33.98990, -117.78670 |
Physical Characteristics
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 460 ft |
| NID Storage | 137 acre-ft |
| Max Storage | 137 acre-ft |
| Surface Area | 20 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | June 10, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1918 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | Tres Hermanos Conservation Authority |
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.