Lake Madigan
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Solano |
| Nearest City | Green Valley |
| River/Stream | Wild Horse Creek |
| Coordinates | 38.30740, -122.19390 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 89 ft |
| Dam Height | 89 ft |
| Dam Length | 665 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 1,175 acre-ft |
| Max Storage | 1,175 acre-ft |
| Surface Area | 72 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 3,670 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Vallejo |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/30/2025 |
| Emergency Action Plan | Yes |