Araujo Reservoir No. 1 dam
Araujo Reservoir No. 1
Araujo Reservoir No. 1, located in Calistoga, California, is a privately owned earth dam built in 1950 primarily for flood risk reduction. Standing at a height of 39 feet with a hydraulic height of 35.6 feet, the reservoir has a storage capacity of 21.9 acre-feet and covers a surface area of 2.3 acres. Despite being classified as having a high hazard potential, the dam is currently assessed to be in fair condition as of September 2017.
Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Araujo Reservoir No. 1 is subject to state regulations, permitting, inspection, and enforcement. The dam is situated on an unnamed river or stream, within the jurisdiction of Napa County, California. Its purpose extends beyond flood risk reduction to include irrigation and water supply, highlighting its importance in supporting local agricultural and water resource needs.
As a key infrastructure for flood risk management in the region, Araujo Reservoir No. 1 plays a vital role in safeguarding nearby communities from potential flooding events. With its strategic location and design, the reservoir serves as a critical component of the water resource system in the area, contributing to the overall resilience and sustainability of the surrounding 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 Araujo Reservoir No. 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Napa R Nr St Helena Ca | 14 cfs | → |
| Sonoma Creek A Kenwood Ca | 3 cfs | → |
| Maacama C Nr Kellogg Ca | 22 cfs | → |
| Matanzas C A Santa Rosa Ca | 3 cfs | → |
| Putah C Nr Guenoc Ca | 45 cfs | → |
| Santa Rosa C A Santa Rosa Ca | 20 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Araujo Reservoir No. 1.
Boat launches
- Chaparral Cove Napa County
- Knoxville Road 1601, Napa County
- Ball Park Avenue 14775, Clearlake
- Napa Valley Vine Trail, Napa
- Public Boat Ramp Spur Sonoma County
- Cuttings Wharf Road 3175-3337, Napa
Campgrounds
- Napa County Fairgrounds
- Bothe - Napa Valley State Park
- Sugarloaf Ridge State Park
- Spring Lake Regional Park
- Sonoma County Fairgrounds Rv Park
- Camp Site 36-55
Fishing spots
Track Araujo Reservoir No. 1 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 Araujo Reservoir No. 1
Where does the data for Araujo Reservoir No. 1 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 Araujo Reservoir No. 1.