Williams Dam dam
Williams Dam
Williams Dam, located in Atascosa, Texas, along the Georgetown Creek, was completed in 1968 and serves primarily for fire protection, stock, and small fish pond purposes. This private-owned earth dam stands at a height of 14 feet with a length of 1150 feet, offering a storage capacity of 106 acre-feet. Despite its modest size, the dam plays a crucial role in managing water resources in the region, with a normal storage capacity of 67 acre-feet and a maximum discharge rate of 2 cubic feet per second.
The dam's condition assessment in 2014 rated it as poor, indicating a need for maintenance and possibly rehabilitation to ensure its long-term reliability and safety. The inspection frequency is set at every two years, with the last inspection conducted in February 2017. While the hazard potential is not available, the risk assessment categorizes the dam's risk level as moderate. With the Texas Commission on Environmental Quality (TCEQ) overseeing state regulation, inspection, and enforcement, Williams Dam remains a critical infrastructure for water resource management and climate resilience in the area.
Water resource and climate enthusiasts will find Williams Dam as a fascinating example of how small-scale dams play a crucial role in local water management systems. It presents both the challenges of maintaining aging infrastructure and the opportunities for sustainable water use in the face of changing climate conditions. As efforts continue to assess and address the dam's condition and risk factors, its significance in ensuring water security for the community and ecosystem resilience in the region remains paramount.
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 Williams Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Atascosa Rv Nr Mccoy | 140 cfs | → |
| San Antonio Rv Nr Floresville | 2,740 cfs | → |
| San Antonio Rv Nr Elmendorf | 737 cfs | → |
| San Antonio Rv Nr Victor Braunig Lk Nr Elmendorftx | 458 cfs | → |
| Medina Rv At San Antonio | 209 cfs | → |
| Atascosa Rv At Whitsett | 498 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Williams Dam.
Boat launches
Fishing spots
Track Williams 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 Williams Dam
Where does the data for Williams 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 Williams Dam.