Alexander Lake Dam dam
Alexander Lake Dam
Located in Hays, Texas, Alexander Lake Dam is a privately owned structure designed for fire protection, stock, or small fish pond purposes. Completed in 1973, this earth dam stands at a height of 20 feet and spans 1200 feet in length, with a storage capacity of 69 acre-feet. The dam overlooks the TR-Plum Creek, a vital water resource in the region.
Managed by the Texas Commission on Environmental Quality (TCEQ), Alexander Lake Dam is subject to state regulations, inspections, and enforcement. Despite being classified as having a high risk potential, the dam's condition is currently not rated. With no spillway or locks, the dam's outlet gates are limited to one. Although its drainage area is listed as zero, the dam serves as a crucial resource for fire protection and irrigation in the area, highlighting its importance for water resource and climate enthusiasts.
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 Alexander Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Blanco Rv Nr Kyle | · | → |
| Blanco Rv At Halifax Rch Nr Kyle | 3 cfs | → |
| Blanco Rv At San Marcos | 1 cfs | → |
| San Marcos Rv At San Marcos | 91 cfs | → |
| San Marcos Rv Nr Martindale | 160 cfs | → |
| Onion Ck At Twin Creeks Rd Nr Manchaca | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Alexander Lake Dam.
Boat launches
- Interstate 35 Frontage Road 2396, San Marcos
- Pecan Park Drive 442, San Marcos
- State Park Road 17065-17099, Kingsbury
- Saint Joseph Street 839, Maxwell
- Plant Road, Kingsbury
- Stairtown Road 515, Luling
Campgrounds
- Leisure Resort On The San Marco River
- Lockhart State Park
- Mckinney Falls State Park
- North Park - Canyon Lake
- Canyon Lake Military - Randolph Afb
- Camp Huaco Springs
Fishing spots
Track Alexander Lake 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 Alexander Lake Dam
Where does the data for Alexander Lake 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 Alexander Lake Dam.