Connally Lake No 1 Dam dam
Connally Lake No 1 Dam
Located in Wilson County, Texas, Connally Lake No 1 Dam stands as a testament to engineering prowess and resource management. Built in 1970, this earth dam with a buttress core stands at 25 feet tall and stretches for 1100 feet, holding a maximum storage capacity of 850 acre-feet. The dam is situated on the TR-Picosa Creek, with the Galveston District overseeing its regulation and inspection.
Despite its age, Connally Lake No 1 Dam remains in good condition, with a hazard potential of 'Not Available' and a high risk assessment rating of 2. While no spillway is present, the dam is equipped with one outlet gate. Although the dam's purpose is listed as 'Other', it serves the community by providing water storage for various needs. The State of Texas, through the Texas Commission on Environmental Quality, regulates and inspects the dam to ensure its continued safety and functionality.
For water resource and climate enthusiasts, Connally Lake No 1 Dam serves as a fascinating example of man-made infrastructure supporting environmental conservation and community development. With its strategic location and efficient design, the dam plays a crucial role in managing water resources in the area. As climate change continues to impact water availability and quality, structures like Connally Lake No 1 Dam become increasingly important for safeguarding our natural resources and ensuring sustainable development for future generations.
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 Connally Lake No 1 Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| San Antonio Rv Nr Floresville | 793 cfs | → |
| San Antonio Rv Nr Elmendorf | 337 cfs | → |
| San Antonio Rv Nr Victor Braunig Lk Nr Elmendorftx | 480 cfs | → |
| Cibolo Ck At Sutherland Springs | 155 cfs | → |
| San Antonio Rv Nr Falls City | 200 cfs | → |
| Medina Rv At San Antonio | 130 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Connally Lake No 1 Dam.
Boat launches
- Calaveras Park; Calaveras Lake.
- Ih 37 Bridge. San Antonio River Access.
- Woodlawn Lake Trail San Antonio
Campgrounds
Fishing spots
Track Connally Lake No 1 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 Connally Lake No 1 Dam
Where does the data for Connally Lake No 1 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 Connally Lake No 1 Dam.