Tallac dam
Tallac
Tallac is a privately owned off-stream dam located in El Dorado County, California. The dam primarily serves the purpose of flood risk reduction, with additional benefits for recreation. Standing at a height of 11.3 meters, Tallac has a storage capacity of 176 acre-feet and a low hazard potential. The dam, designed as a gravity type, was last inspected in May 2020 and was found to be in fair condition.
Managed by the California Department of Water Resources, Tallac is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and functionality. The dam has a history of meeting guidelines and has not required emergency action plans to be prepared. With a congressman representing the San Francisco District, where the dam is situated, Tallac plays a crucial role in managing flood risks while also providing recreational opportunities for the local community.
Enthusiasts of water resources and climate will find Tallac to be an intriguing structure that combines engineering expertise with environmental considerations. Its presence contributes to the overall flood risk reduction efforts in the region and offers a recreational space for residents to enjoy. With a focus on safety and regulation, Tallac stands as a testament to responsible dam management in the state of California.
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 Tallac -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Up Truckee R A South Lake Tahoe Ca | 213 cfs | → |
| Trout C Nr Tahoe Valley Ca | 52 cfs | → |
| Edgewood Ck At Stateline | 2 cfs | → |
| Eagle Rock Ck Nr Stateline | 1 cfs | → |
| Upper Truckee R At Hwy 50 Above Meyers Ca | 216 cfs | → |
| Daggett Creek Near Genoa | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Tallac.
⚓ Boat launches
- Cave Rock Boat Launch Douglas County
- Ice House Road El Dorado County
- Indian Creek Camp Ground Day Use Area
- Summit Lake Trail Alpine County
- Amador County
- Dry Lakes Trail El Dorado County
⛺ Campgrounds
- Tahoe Valley Campground
- Camp Richardson
- Camp Richardson Complex
- Fallen Leaf Campground
- Fallen Leaf
- Campground By The Lake
🎣 Fishing spots
More fishing →🛶 Paddle runs
- Headwaters In Sec 7, T11n, R18e To Blair Bridge
- 1/4 Mile North Of State Highway 50 To Avalanche Lake
- Headwaters To South Of Upper Truckee Road (Sec Line Between 17/20 Intercepts River And Unnamed Tributary)
- State Highway 50 To 1/4 Mile North Of State Highway 50
- Headwaters In Sec 15,T10n, R17e To Confluence With Silver Fork Of American River
- Tahoe City To River Ranch
Track Tallac 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 Tallac
Where does the data for Tallac 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 Low 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 Tallac.