Fleming Hill No. 2
Fleming Hill No. 2 is an earth dam located in Solano County, California, built in 1912. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Fleming Hill No. 2
The primary purpose of Fleming Hill No. 2 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Vallejo (local government). It impounds the Tr Napa River near City Of Vallejo.
The dam stands 39 feet tall and stretches 570 feet across, creates a reservoir covering 2 acres, and has a maximum storage capacity of 33 acre-feet. Completed in 1912, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/01/2025.
At 39 feet, this dam is taller than 86% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The California dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | California |
| County | Solano |
| Nearest City | City Of Vallejo |
| River/Stream | Tr Napa River |
| Coordinates | 38.13740, -122.24270 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 570 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 33 acre-ft |
| Max Storage | 33 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Vallejo |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/01/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00143 |
| Federal ID | CA00143 |
| More Info | State Dam Safety Program |