Arrowhead Lakes Lower Dam Dam
Arrowhead Lakes Lower Dam
Arrowhead Lakes Lower Dam, located in Dent, Missouri, was completed in 1973 and serves primarily for flood risk reduction. This private dam, with a height of 27 feet and a storage capacity of 159 acre-feet, plays a crucial role in protecting the surrounding area from potential flooding events. Situated on the TR Meramec River, the dam covers a surface area of 11 acres and has a drainage area of 360 square miles, making it an essential structure for water resource management in the region.
Despite its importance in flood control, Arrowhead Lakes Lower Dam has a high hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The last inspection of the dam took place in August 1979, indicating a need for regular monitoring and maintenance to ensure its continued effectiveness in flood risk reduction. With no state regulation or inspection, the responsibility for the upkeep of this vital infrastructure falls solely on its private owners.
In addition to flood risk reduction, the dam also provides recreational opportunities in the area. While the dam's primary purpose is flood control, its presence enhances the natural landscape and offers a space for outdoor activities. As water resource and climate enthusiasts, it is essential to recognize the significance of Arrowhead Lakes Lower Dam in both flood protection and recreational enjoyment, highlighting the intersection of water management and community engagement in the region.
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 Arrowhead Lakes Lower Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Meramec River At Cook Station | 114 cfs | → |
| Meramec River Near Steelville | 786 cfs | → |
| Current River Above Akers | 220 cfs | → |
| Little Piney Creek At Newburg | 116 cfs | → |
| Big Piney River Near Big Piney | 391 cfs | → |
| Gasconade River At Jerome | 1,040 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Arrowhead Lakes Lower Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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More reservoirs
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About Arrowhead Lakes Lower Dam
Where does the data for Arrowhead Lakes Lower 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.