Arrowhead Lake Upper Dam dam
Arrowhead Lake Upper Dam
Arrowhead Lake Upper Dam in Dent, Missouri, is a privately owned structure with a primary purpose of recreation. Completed in 1973, this earth dam stands at a height of 24 feet and has a length of 650 feet, creating a reservoir with a storage capacity of 84 acre-feet. The dam is situated on TR-Meramec Creek in the St. Louis District and serves as a popular spot for water resource and climate enthusiasts to enjoy various recreational activities.
Despite its low hazard potential and moderate risk assessment, Arrowhead Lake Upper Dam has not been state regulated or inspected, indicating a level of self-governance by the private owner. The dam features an uncontrolled spillway with a width of 20 feet and no outlet gates. While the condition assessment is not rated, the structure poses minimal risk to surrounding areas. The dam's location in Cook Station offers a serene setting for visitors to appreciate the beauty of nature while appreciating the importance of sustainable water resource management in the region.
With a surface area of 2.9 acres and a drainage area of 128 square miles, Arrowhead Lake Upper Dam plays a crucial role in water storage and management in the area. While it may not be under federal oversight, the dam serves as a vital resource for the community, highlighting the delicate balance between recreation and environmental conservation in the face of changing climate patterns. As enthusiasts explore this scenic spot, they are reminded of the interconnectedness between water resources, climate, and human activities, emphasizing the need for responsible stewardship of our natural surroundings.
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 Arrowhead Lake Upper Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Meramec River At Cook Station | 41 cfs | → |
| Meramec River Near Steelville | 299 cfs | → |
| Current River Above Akers | 315 cfs | → |
| Little Piney Creek At Newburg | 168 cfs | → |
| Big Piney River Near Big Piney | 245 cfs | → |
| Gasconade River At Jerome | 1,360 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Arrowhead Lake Upper Dam.
Boat launches
- State Highway B Shannon County
- Prairie Lake Road Phelps County
- Crossroads Access
- Crawford County
- Mason Road Texas County
Campgrounds
Fishing spots
Paddle runs
- State Highway 49 Bridge Near Dillard, Missouri To Forest Boundary In Sections 13/24, T38n, R3w
- Missouri State Highway 17 To Fort Leonard Wood (Army Base)
- Northern Boundary Of Fort Leonard Wood To North Section Line Of Sec 31, T36n, R10w
- Confluence With Alley Spring (Branch) To Confluence With Current River (Does Not Include River Segment In Gap Between Parkland Units)
- Western Edge Of Ozark National Scenic Riverways To Confluence With Alley Spring (Branch)
- County Highway O, Laclede, County, Missouri To Ozark Spring
Track Arrowhead Lake Upper 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 Arrowhead Lake Upper Dam
Where does the data for Arrowhead Lake Upper 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 Low 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 Arrowhead Lake Upper Dam.