Lake Ann Dam dam
Lake Ann Dam
Lake Ann Dam, located in Bella Vista Village, Arkansas, is a private-owned earth dam constructed in 1970 primarily for recreational purposes. With a height of 65 feet and a length of 760 feet, the dam impounds Pinion Creek, creating a reservoir with a storage capacity of 2900 acre-feet and a surface area of 90 acres. The dam has a high hazard potential and is regulated by the Arkansas Natural Resources Commission, with state permitting, inspection, and enforcement in place to ensure its safety.
Despite being classified as "Not Rated" in terms of condition assessment, Lake Ann Dam is regularly inspected, with the last inspection conducted in December 2016. The dam's maximum discharge capacity is 7150 cubic feet per second, and it serves as a recreational hub for the local community. While there are no associated structures or outlet gates, the dam poses a high hazard potential, highlighting the importance of ongoing monitoring and risk management measures to ensure the safety of the surrounding area in the event of an emergency. For water resource and climate enthusiasts, Lake Ann Dam is a fascinating example of human intervention in the natural landscape, balancing the need for recreation with the responsibility of safeguarding against potential risks.
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 Lake Ann Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Sugar Creek Near Powell | 635 cfs | → |
| Osage Creek Near Cave Springs | 58 cfs | → |
| Indian Creek Near Lanagan | 980 cfs | → |
| Osage Creek Near Elm Springs | 259 cfs | → |
| Flint Creek At Springtown | 5 cfs | → |
| Spavinaw Creek Near Maysville | 50 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Ann Dam.
Boat launches
- Memorial Drive 500, Bella Vista
- Lakeside Drive Bella Vista
- Lake Ann Boat Ramp
- Lake Windsor Boat Ramp
- Ashwell Lane 3, Bella Vista
- Kensington Drive 38, Bella Vista
Campgrounds
- Vacation Rentals
- Prairie Creek - Beaver Lake
- Lanagan Access City Park
- Rocky Branch - Beaver Lake
- Lost Bridge South - Beaver Lake
- Lost Bridge North - Beaver Lake
Fishing spots
Track Lake Ann 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 Lake Ann Dam
Where does the data for Lake Ann 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 Lake Ann Dam.