Langtry dam
Langtry
Langtry is a privately owned dam located in Aetna Springs, California, along the Tr Cassidy Creek. Completed in 1992, this earth-type dam stands at 50 feet high and spans 450 feet in length, providing water supply primarily for irrigation purposes. With a storage capacity of 525 acre-feet and a surface area of 34 acres, Langtry plays a crucial role in water management in the region.
Managed by the California Department of Water Resources under the Safety of Dams program, Langtry is subject to regular inspections and enforcement to ensure its structural integrity and safe operation. The dam has been assessed to have a low hazard potential and is currently in satisfactory condition as of the last assessment in September 2017. Its location in Lake County, California, within the San Francisco District of the US Army Corps of Engineers, further highlights its importance in the local water resource infrastructure.
Enthusiasts of water resources and climate in California will find Langtry to be a significant structure contributing to the irrigation and water supply needs of the region. With its strategic location along Tr Cassidy Creek and its state-regulated status, Langtry serves as a vital component in the management of water resources in Lake County. Its low hazard potential and satisfactory condition ensure that it continues to support agricultural and environmental needs in a sustainable manner.
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 Langtry -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Putah C Nr Guenoc Ca | 39 cfs | → |
| Maacama C Nr Kellogg Ca | 17 cfs | → |
| Cache C Nr Lower Lake Ca | 614 cfs | → |
| Big Sulphur C A G Resort Nr Cloverdale Ca | 9 cfs | → |
| Napa R Nr St Helena Ca | 9 cfs | → |
| Russian R A Jimtown Ca | 170 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Langtry.
Boat launches
- Chaparral Cove Napa County
- Ball Park Avenue 14775, Clearlake
- Knoxville Road 1601, Napa County
- Island Drive Lake County
- Lake County
- Walker Ridge Road Lake County
Campgrounds
- Napa County Fairgrounds
- Cedar Creek Ohv Dispersed - Knoxville Ra
- Lower Hunting Creek - Knoxville Rec Area
- Hunting Creek Camp
- Horse Camp
- Bothe - Napa Valley State Park
Fishing spots
Paddle runs
- Cache Creek
- North Fork Cache Creek
- Headwaters In Sec 28, T18n, R8w To One-Third Mile Beyond Snow Mt. Wilderness Boundary At Private Property Boundary Near Paradise Creek
More reservoirs
Track Langtry 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 Langtry
Where does the data for Langtry 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 Langtry.