Mathews
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Riverside |
| Nearest City | La Sierra |
| River/Stream | Tr Cajalco Creek |
| Coordinates | 33.84200, -117.46240 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 264 ft |
| Dam Height | 264 ft |
| Dam Length | 6,522 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 182,000 acre-ft |
| Max Storage | 182,000 acre-ft |
| Surface Area | 2,750 acres |
| Drainage Area | 40 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Metropolitan Water District Of Southern California |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/09/2025 |
| Emergency Action Plan | Yes |