Ann Road Detention Basin Dam dam
Ann Road Detention Basin Dam
The Ann Road Detention Basin Dam in Las Vegas, Nevada, is a critical infrastructure designed by The Louis Berger Group Inc to reduce flood risk in the area. Completed in 2007, this earth dam stands at a height of 32 feet and has a hydraulic height of 15 feet, providing a storage capacity of 364 acre-feet to mitigate potential flooding events. Situated along the Las Vegas Wash-TR river or stream, the dam serves a primary purpose of flood risk reduction and is regulated by the Nevada Department of Water Resources.
With a spillway width of 1360 feet and a maximum discharge capacity of 25,200 cubic feet per second, the Ann Road Detention Basin Dam is equipped to manage high hazard potential situations. Despite being classified as having a fair condition assessment as of May 2021, the dam is subject to regular inspections and maintenance to ensure its structural integrity and operational effectiveness. The dam also features an uncontrolled outlet gate and is located in Clark County, under the jurisdiction of the local government with state oversight.
For water resource and climate enthusiasts, the Ann Road Detention Basin Dam represents a vital piece of infrastructure in the region's flood management system. This multi-arch earth dam not only provides flood protection for the surrounding area but also serves as a testament to the collaborative efforts between the local government, design engineers, and regulatory agencies to safeguard the community from potential water-related hazards. As climate change continues to impact weather patterns and increase the frequency of extreme events, the importance of such structures in mitigating risks and ensuring water resource resilience cannot be understated.
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 Ann Road Detention Basin Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Sloan Channel Tr At Las Vegas Blvd Nr N Las Vegas | · | → |
| Flamingo Wash At Nellis Blvd Nr Las Vegas | 4 cfs | → |
| Sloan Channel At Charleston Blvd Nr Las Vegas | 1 cfs | → |
| Las Vegas Wash Nr Sahara Ave Nr Las Vegas | 2 cfs | → |
| Lv Wash Blw Flamingo Wash Confl Nr Las Vegas | 212 cfs | → |
| Las Vegas Wash At Vegas Valley Dr Nr Las Vegas | 68 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Ann Road Detention Basin Dam .
Track Ann Road Detention Basin 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 Ann Road Detention Basin Dam
Where does the data for Ann Road Detention Basin 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 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 Ann Road Detention Basin Dam .