Lake Alta
High HazardFair ConditionEmergency Action Plan: Yes
Location
| County | Placer |
| Nearest City | Unpopulated |
| River/Stream | Tr Nfk American R |
| Coordinates | 39.20250, -120.81670 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 955 ft |
| Year Completed | 1862 (164 years old) |
Storage & Hydraulics
| NID Storage | 270 acre-ft |
| Max Storage | 270 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Placer County Water Agency |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/24/2025 |
| Emergency Action Plan | Yes |