Homestake Tailings dam
Homestake Tailings
Homestake Tailings, located in Lake County, California, is a privately owned earth dam designed for water supply purposes, specifically to store tailings and provide water to the surrounding area. Completed in 1990, this dam stands at a height of 169 feet and has a hydraulic height of 163 feet, with a storage capacity of 32,370 acre-feet. The dam spans a length of 11,670 feet and covers a surface area of 412 acres, with a drainage area of 1.48 square miles.
Despite its high hazard potential, Homestake Tailings has been assessed to be in satisfactory condition during its last inspection in September 2017. The dam is regulated by the California Department of Water Resources and is subject to regular inspections, enforcement, and permitting. The emergency action plan for the dam was last revised in January 2021, ensuring that proper measures are in place in case of any unforeseen events. Overall, Homestake Tailings serves as a crucial water resource infrastructure in the region, providing water for various purposes while adhering to strict regulatory guidelines to ensure public safety and environmental protection.
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 Homestake Tailings -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Putah C Nr Guenoc Ca | 39 cfs | → |
| Bear C Ab Holsten Chimney Cyn Nr Rumsey Ca | 20 cfs | → |
| Cache C Nr Lower Lake Ca | 628 cfs | → |
| Nf Cache C Nr Clearlake Oaks Ca | 42 cfs | → |
| Big Sulphur C A G Resort Nr Cloverdale Ca | 10 cfs | → |
| Kelsey C Nr Kelseyville Ca | 13 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Homestake Tailings.
Boat launches
- Ball Park Avenue 14775, Clearlake
- Walker Ridge Road Lake County
- Island Drive Lake County
- Chaparral Cove Napa County
- Lake County
- Lucerne Harbor Park
Campgrounds
- Cedar Creek Ohv Dispersed - Knoxville Ra
- Hunting Creek Camp
- Lower Hunting Creek - Knoxville Rec Area
- Buck Island Campground
- Cache Creek Canyon County Park
- Pond
Fishing spots
Track Homestake Tailings 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 Homestake Tailings
Where does the data for Homestake Tailings 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 Homestake Tailings.