Lake Post Commons Dam dam
Lake Post Commons Dam
Lake Post Commons Dam, located in Chesterfield, Missouri, is a privately owned structure that serves the primary purpose of flood risk reduction. Completed in 1976, this earth dam stands at a height of 44 feet and has a length of 320 feet. With a maximum storage capacity of 67 acre-feet and a normal storage of 40 acre-feet, the dam plays a crucial role in managing water resources in the area.
Managed by the DAM AND RESERVOIR SAFETY PROG of Missouri, Lake Post Commons Dam is state regulated, inspected, and enforced, ensuring its structural integrity and safety. The dam, situated on the TR TO BONHOMME CREEK, also provides recreational opportunities for the community. With a high hazard potential and a satisfactory condition assessment, the dam poses a moderate risk (3) and has undergone regular inspections to ensure its resilience in the face of potential emergencies.
Overall, Lake Post Commons Dam stands as a vital infrastructure for flood control and water management in St. Louis County. With its strategic location and significant storage capacity, the dam serves as a key component in safeguarding the surrounding area from flooding risks while also offering recreational benefits for the local residents. The continuous oversight and maintenance of this structure demonstrate a commitment to water resource management and climate resilience 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 Lake Post Commons Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Caulks Creek At Chesterfield | 12 cfs | → |
| Creve Couer Creek At Chesterfield | 2 cfs | → |
| Bonhomme Creek Near Clarkson Valley | 5 cfs | → |
| Creve Coeur Creek Near Creve Coeur | 7 cfs | → |
| Grand Glaize Creek Near Manchester | 1 cfs | → |
| Bonhomme Creek Near Ellisville | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Post Commons Dam.
Boat launches
- Lake View Loop Trail Maryland Heights
- Grand Glaize Pkwy 1084, Valley Park
- Scott A Lewis Lane Cottleville
- Katy Trail 1800, Saint Charles County
- Kirkwood
Track Lake Post Commons 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 Post Commons Dam
Where does the data for Lake Post Commons 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 Post Commons Dam.