Dyer dam
Dyer
Dyer Dam, located in Alameda, California, was completed in 2011 and has a primary purpose of water supply for irrigation and domestic use. This earth dam stands at a height of 30 feet with a hydraulic height of 27 feet, providing a storage capacity of 525 acre-feet. The dam spans a length of 1850 feet and covers a surface area of 25 acres, serving a drainage area of 0.88 square miles.
Managed by the California state agency, Dyer Dam is regulated, permitted, inspected, and enforced by the Department of Water Resources (DWR) under the Safety of Dams program. The dam is classified with a high hazard potential, although its current condition assessment rates as fair. Regular inspections and maintenance ensure the safety and integrity of the structure, with the most recent assessment conducted in January 2021.
For water resource and climate enthusiasts, Dyer Dam offers a fascinating insight into California's water management infrastructure. As a critical component in the state's water supply system, the dam plays a vital role in ensuring the availability of water for agricultural and residential use in the region. With its high hazard potential, ongoing monitoring and risk management measures are essential to safeguarding the surrounding communities and enhancing the resilience of the dam in the face of changing climate conditions.
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 Dyer -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Grant Line Cn Nr Tracy Ca | 4,810 cfs | → |
| Arroyo Valle Nr Livermore Ca | 7 cfs | → |
| Arroyo Valle Bl Lang Cn Nr Livermore Ca | 1 cfs | → |
| Marsh C A Brentwood Ca | 0 cfs | → |
| Alamo Cn Nr Pleasanton Ca | 4 cfs | → |
| Arroyo De La Laguna A Verona Ca | 10 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Dyer.
Boat launches
- California Aqueduct Bikeway, Byron
- Lake Elizabeth Boat Ramp
- Chelsea Drive 5094, Newark
- Mcavoy Road 1099, Bay Point
- Doolittle Drive 7250, Oakland
- Santa Clara County
Campgrounds
- Round Valley Group Camp
- Venados Group Camp
- Hetch Hetchy Group Camp
- Carnegie State Vehicle Rec Area
- Cedar Group Camp
- Eagles View Group Camp
Fishing spots
Paddle runs
More reservoirs
Track Dyer 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 Dyer
Where does the data for Dyer 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 Dyer.