Thermalito Afterbay
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | California |
| County | Butte |
| Nearest City | Marysville |
| River/Stream | Feather River - Off Stream |
| Coordinates | 39.47710, -121.68710 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 42,000 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 57,041 acre-ft |
| Normal Storage | 57,041 acre-ft |
| Surface Area | 6,900 acres |
| Drainage Area | 13 sq mi |
| Max Discharge | 17,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | California Department of Water Resources |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 08/23/2023 |
| Emergency Action Plan | Yes |