New Upper San Leandro dam
New Upper San Leandro
Located in San Leandro, California, the New Upper San Leandro dam is a vital infrastructure designed for flood risk reduction along the San Leandro Creek. Completed in 1977, this earth dam stands at an impressive height of 182 feet and has a storage capacity of 42,000 acre-feet. With a drainage area of 29.95 square miles, the dam plays a crucial role in safeguarding the surrounding area from potential flooding events.
Managed by a public utility, the New Upper San Leandro dam is regulated by the Department of Water Resources (DWR) in California. The dam's condition is assessed as satisfactory, with a high hazard potential due to its location and purpose. Regular inspections are conducted to ensure its structural integrity and operational readiness, with the last inspection taking place in December 2020. In case of emergencies, an Emergency Action Plan (EAP) is in place to address any potential risks and ensure the safety of the surrounding community.
With its strategic location and significant impact on flood risk reduction, the New Upper San Leandro dam stands as a critical component of water resource management in Alameda County. As climate change continues to pose challenges to water infrastructure, this dam serves as a testament to the importance of proactive measures in protecting communities and ecosystems from the impacts of extreme weather events. Enthusiasts of water resources and climate resilience will find the New Upper San Leandro dam a fascinating example of engineering ingenuity and resource management in the face of an ever-changing environment.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around New Upper San Leandro -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cull C Ab Cull C Res Nr Castro Valley Ca | 0 cfs | → |
| Crow C Nr Hayward Ca | 1 cfs | → |
| San Ramon C A San Ramon Ca | 1 cfs | → |
| San Lorenzo C Ab Don Castro Res Nr Castro V Ca | 1 cfs | → |
| San Lorenzo C A Hayward Ca | 3 cfs | → |
| Castro Valley C A Hayward Ca | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near New Upper San Leandro.
⚓ Boat launches
- Doolittle Drive 7250, Oakland
- San Francisco Bay Trail, Oakland
- Mckay Avenue 1200, Alameda
- San Francisco Bay Trail, Berkeley
- Powell Street 3310, Emeryville
- Chelsea Drive 5094, Newark
⛺ Campgrounds
- Anthony Chabot Regional Park
- Anthony Chabot Family Campground
- Bort Meadow Group Camp
- Corral Camp
- Pal Camp
- Girls Camp
🎣 Fishing spots
More fishing →🛶 Paddle runs
- Headwaters To Mouth
- Headwaters To Ends One Quarter Mile South Of Bear Valley Road Bridge Segment 1: Ends 1/4 Mile South Of Bear Valley Road Bridge Segment 2: Caltrans Corporation Yard At Point Reyes Staton.
- Olema Ranch Campground To Caltrans Corporation Yard At Point Reyes Station
- Gold Creek To Three Pools (Opal Creek Run)
🛡 More reservoirs
More reservoirs →Track New Upper San Leandro in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About New Upper San Leandro
Where does the data for New Upper San Leandro come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of New Upper San Leandro.