New Upper San Leandro
New Upper San Leandro is an earth dam located in Alameda County, California, built in 1977. It carries a High hazard potential classification and has a satisfactory condition assessment.
About New Upper San Leandro
New Upper San Leandro is a dam in Alameda, California. The dam is owned by East Bay Municipal Utility District (public utility). It impounds the San Leandro Creek.
The dam stands 182 feet tall and stretches 1,300 feet across, creates a reservoir covering 790 acres, has a maximum storage capacity of 42,000 acre-feet, and collects water from a drainage area of 29 square miles. Completed in 1977, the structure is 49 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 12/10/2024.
At 182 feet, this dam is taller than 99% of all dams in the United States.
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 | Alameda |
| River/Stream | San Leandro Creek |
| Coordinates | 37.76410, -122.09430 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 182 ft |
| Dam Height | 182 ft |
| Dam Length | 1,300 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 42,000 acre-ft |
| Max Storage | 42,000 acre-ft |
| Surface Area | 790 acres |
| Drainage Area | 29 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | East Bay Municipal Utility District |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/10/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01082 |
| Federal ID | CA01082 |
| More Info | State Dam Safety Program |