Ralston Afterbay
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | California |
| County | Placer |
| Nearest City | Auburn |
| River/Stream | Rubicon River |
| Coordinates | 39.00430, -120.74640 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 89 ft |
| Dam Height | 89 ft |
| Dam Length | 560 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 2,780 acre-ft |
| Max Storage | 2,780 acre-ft |
| Normal Storage | 2,700 acre-ft |
| Surface Area | 83 acres |
| Drainage Area | 214 sq mi |
| Max Discharge | 159,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Placer County Water Agency |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 08/23/2023 |
| Emergency Action Plan | Yes |