Twin Tank Dam dam
Twin Tank Dam
Twin Tank Dam, located in Zavala, Texas, is a private-owned Earth dam completed in 1971 with a primary purpose of serving as a Fish and Wildlife Pond. With a height of 15 feet and a length of 2000 feet, this dam has a storage capacity of 238 acre-feet, making it a vital resource for fire protection, stock watering, and supporting aquatic life in the area. While it lacks a spillway, it is equipped with one outlet gate for water management.
Despite not being regulated by the state, Twin Tank Dam poses a high risk potential due to its condition being not rated and the absence of an Emergency Action Plan. This dam is crucial for maintaining the ecological balance of the TR-GALINA SLOUGH river or stream and providing a habitat for various species of fish and wildlife. With its strategic location and function, Twin Tank Dam plays a significant role in the local ecosystem and water resource management efforts in Texas.
As water resource and climate enthusiasts, it is essential to recognize the importance of Twin Tank Dam in preserving the natural environment and supporting biodiversity in the region. The risk associated with its condition underscores the need for proactive monitoring and management to ensure its continued effectiveness in serving its primary purpose as a Fish and Wildlife Pond. Understanding the role of structures like Twin Tank Dam is crucial for sustainable water resource management and conservation efforts in the face of changing climate patterns.
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 Twin Tank Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Leona Rv Nr Uvalde | · | → |
| Nueces Rv Bl Uvalde | 0 cfs | → |
| Frio Rv Bl Dry Frio Rv Nr Uvalde | · | → |
| Nueces Rv Nr Asherton | 23 cfs | → |
| Sabinal Rv At Sabinal | · | → |
| Frio Rv Nr Derby | · | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Twin Tank Dam.
Track Twin Tank Dam 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 Twin Tank Dam
Where does the data for Twin Tank Dam 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 Not Available 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 Twin Tank Dam.