R. W. Matthews
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | California |
| County | Trinity |
| Nearest City | Mad River |
| River/Stream | Mad River |
| Coordinates | 40.36850, -123.43320 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 150 ft |
| Dam Height | 150 ft |
| Dam Length | 630 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 60,200 acre-ft |
| Max Storage | 60,200 acre-ft |
| Normal Storage | 48,000 acre-ft |
| Surface Area | 1,180 acres |
| Drainage Area | 120 sq mi |
| Max Discharge | 49,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Humboldt Bay Municipal Water District |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/16/2023 |
| Emergency Action Plan | Yes |