Lake Herman
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Solano |
| Nearest City | Benicia |
| River/Stream | Sulphur Springs Cr |
| Coordinates | 38.09530, -122.15020 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 51 ft |
| Dam Height | 51 ft |
| Dam Length | 700 ft |
| Year Completed | 1905 (121 years old) |
Storage & Hydraulics
| NID Storage | 2,210 acre-ft |
| Max Storage | 2,210 acre-ft |
| Surface Area | 110 acres |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Benicia |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/16/2025 |
| Emergency Action Plan | Yes |