St. Anne's Dam dam
St. Anne's Dam
St. Anne's Dam, located in Truth or Consequences, New Mexico, stands as a vital structure for flood risk reduction along the Rio Grande. Built in 1960, this earth-type dam is 35 feet tall and spans 334 feet in length, serving to protect the surrounding area from potential inundation. Despite its important role, recent assessments have deemed the dam to be in poor condition, with a high hazard potential, highlighting the need for maintenance and risk management measures.
Managed by the local government and regulated by the Office of the State Engineer, St. Anne's Dam plays a crucial role in safeguarding the community from potential flooding events. Its uncontrolled spillway, with a width of 12 feet, can handle a maximum discharge of 1200 cubic feet per second, aiding in flood control efforts. However, with a surface area of only 9 acres and no normal storage capacity listed, the dam's ability to mitigate flooding in the region may be limited.
As climate change continues to impact water resources and weather patterns, the importance of maintaining and assessing infrastructure like St. Anne's Dam becomes increasingly critical. With a moderate risk assessment rating and a history of poor condition, stakeholders must prioritize necessary repairs and upgrades to ensure the dam remains effective in protecting the community from potential flood events along the Rio Grande.
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 St. Anne's Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rio Grande Below Elephant Butte Dam | 843 cfs | → |
| Rio Grande At Narrows In Elephant Butte Res. | · | → |
| Rio Grande Floodway At San Marcial | · | → |
| Rio Grande Conveyance Channel At San Marcial | 10 cfs | → |
| Mimbres River At Mimbres | 1,040 cfs | → |
| Salt Creek Near Tularosa | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near St. Anne's Dam.
Boat launches
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Campgrounds
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River runs
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About St. Anne's Dam
Where does the data for St. Anne's 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 High 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 below 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.
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.