Pennsylvania Creek
Pennsylvania Creek is an earth dam located in Solano County, California, built in 1958. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Pennsylvania Creek
The primary purpose of Pennsylvania Creek is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Fairfield (local government). It impounds the Pennsylvania Cr.
The dam stands 14 feet tall and stretches 3,100 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 148 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1958, the structure is well into its service life at over 50 years 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 09/23/2025.
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 |
| River/Stream | Pennsylvania Cr |
| Coordinates | 38.26160, -122.06630 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 3,100 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 148 acre-ft |
| Max Storage | 148 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Fairfield |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/23/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00023 |
| Federal ID | CA00023 |
| More Info | State Dam Safety Program |