Stergen Lake Dam dam
Stergen Lake Dam
Stergen Lake Dam, located in Femme Osage, Missouri, is a state-owned structure primarily used for recreation. Completed in 1970, this earth dam stands at a height of 46 feet and has a length of 600 feet, providing a storage capacity of 139 acre-feet. With a normal storage of 100 acre-feet and a surface area of 13 acres, the dam's main purpose is to support recreational activities.
Managed by the DAM AND RESERVOIR SAFETY PROG in Missouri, Stergen Lake Dam is subject to state regulation, inspection, and enforcement to ensure its safety and compliance with guidelines. The dam has a high hazard potential but is currently assessed to be in satisfactory condition. Despite its moderate risk rating, the dam has not been assigned a Dam Safety Action Classification (DSAC) date, indicating a need for ongoing monitoring and risk management measures to mitigate potential hazards.
Overall, Stergen Lake Dam serves as a vital water resource and recreational area in St. Charles County. With its strategic location on the TR-FEMME OSAGE CREEK and its role in providing storage and flood control benefits, the dam plays a significant role in water management and climate resilience efforts in the region.
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 Stergen Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Bourbeuse River At Union | 329 cfs | → |
| Bonhomme Creek Near Ellisville | 3 cfs | → |
| Dardenne Creek At Ofallon | 185 cfs | → |
| Meramec River At Pacific | 1,360 cfs | → |
| Bonhomme Creek Near Clarkson Valley | 11 cfs | → |
| Caulks Creek At Chesterfield | 60 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stergen Lake Dam.
Boat launches
- Downtown Washington
- Katy Trail 1800, Saint Charles County
- Buchheit Road 128, Franklin County
- Stierberger Court Union
- Brittany Place 1, Lake Saint Louis
- Windjammer Point 200, Lake Saint Louis
Campgrounds
- Klondike County Park
- Babler Memorial State Park
- Robertsville State Park
- Camp Trinity
- St. Peters 370 Lakeside Park
- Hermann City Rv Park
Paddle runs
Track Stergen Lake 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 Stergen Lake Dam
Where does the data for Stergen Lake 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 Stergen Lake Dam.