Eaton H. Magoon Lake dam
Eaton H. Magoon Lake
Eaton H. Magoon Lake, located in Napa, California, is a privately owned Earth dam built in 1965 primarily for water supply purposes, including irrigation and water supply. The dam has a height of 27 feet and a hydraulic height of 22 feet, with a storage capacity of 2762 acre-feet and a surface area of 243 acres. The lake is fed by Routan Creek and serves as a vital resource for the surrounding area.
Despite being privately owned, Eaton H. Magoon Lake is regulated and inspected by the California Department of Water Resources (DWR) for safety compliance. The dam has a high hazard potential and is classified as in fair condition as of the latest assessment in February 2021. The dam has a spillway, although specific details about its type and width are not provided in the data. The last inspection took place in September 2020, with a frequency of once per year.
With its strategic location and crucial role in water supply, Eaton H. Magoon Lake stands as a key reservoir in the region, ensuring a reliable water source for agricultural and domestic needs. As a privately owned structure, the dam is subject to rigorous state regulation and enforcement to maintain its safety and operational integrity. As climate change continues to impact water resources, the management and maintenance of dams like Eaton H. Magoon Lake are essential for ensuring water security and resilience in the face of changing environmental 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 Eaton H. Magoon Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Putah C Nr Guenoc Ca | 35 cfs | → |
| Cache C Nr Lower Lake Ca | 604 cfs | → |
| Cache C A Rumsey Ca | 686 cfs | → |
| Bear C Ab Holsten Chimney Cyn Nr Rumsey Ca | 20 cfs | → |
| Napa R Nr St Helena Ca | 9 cfs | → |
| Maacama C Nr Kellogg Ca | 17 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Eaton H. Magoon Lake.
Boat launches
- Chaparral Cove Napa County
- Ball Park Avenue 14775, Clearlake
- Knoxville Road 1601, Napa County
- Island Drive Lake County
- Walker Ridge Road Lake County
- Lake County
Campgrounds
- Cedar Creek Ohv Dispersed - Knoxville Ra
- Lower Hunting Creek - Knoxville Rec Area
- Hunting Creek Camp
- Camp Site 1-35
- Camp Site 73-100
- Camp Site 36-55
Fishing spots
Track Eaton H. Magoon Lake 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 Eaton H. Magoon Lake
Where does the data for Eaton H. Magoon Lake 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 Eaton H. Magoon Lake.