Lake Osage Dam dam
Lake Osage Dam
Lake Osage Dam, also known as Camp Arrowhead Dam, is a privately-owned structure located in Webster, Missouri, along the Osage Fork of the Gasconade River. Built in 1959, this Earth-type dam stands at a height of 38 feet and spans 600 feet in length, with a maximum storage capacity of 151 acre-feet and a normal storage of 108 acre-feet. The primary purpose of Lake Osage Dam is for recreation, offering a surface area of 12 acres for outdoor activities.
Managed by the DAM AND RESERVOIR SAFETY PROG, the state-regulated dam is subject to regular inspections and enforcement to ensure its safety and satisfactory condition. With a hazard potential rated as high, the dam poses moderate risk and is categorized as having a moderate risk management level. Despite its risk level, the dam has been deemed to meet guidelines for emergency action plans, although specifics on inundation maps and risk assessment summaries are not provided. Overall, Lake Osage Dam serves as a vital resource for water recreation enthusiasts in the area while also being subject to necessary regulatory oversight to ensure public safety.
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 Osage Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pearson Creek Near Springfield | 15 cfs | → |
| South Fork Dry Sac River Near Springfield | 6 cfs | → |
| James River Near Springfield | 66 cfs | → |
| Niangua River At Windyville | 143 cfs | → |
| Wilson Creek At Springfield | 12 cfs | → |
| South Creek Nr Springfield | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Osage Dam.
Boat launches
- Freight Road Dallas County
- Lake Springfield Park Road Springfield
- Bssp 1 Road Laclede County
- Dallas County
Campgrounds
Paddle runs
- County Highway O, Laclede, County, Missouri To Ozark Spring
- 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
- Hebron Access Site To Southern Forest Boundary In Sec 33, T24n, R11w
Track Lake Osage 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 Osage Dam
Where does the data for Lake Osage 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 Osage Dam.