San Lorenzo Creek
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Alameda |
| Nearest City | Hayward |
| River/Stream | San Lorenzo Creek |
| Coordinates | 37.69100, -122.05530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 65 ft |
| Dam Height | 65 ft |
| Dam Length | 385 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 380 acre-ft |
| Max Storage | 380 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 19 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Alameda County Public Works Agency |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/30/2025 |
| Emergency Action Plan | Yes |