Mcnair Lake Dam dam
Mcnair Lake Dam
Mcnair Lake Dam, located in St. Charles, Missouri, is a private dam primarily used for recreational purposes. The dam, with a height of 25 feet, has a maximum storage capacity of 187 acre-feet and a normal storage capacity of 108 acre-feet. It is situated on the TR PERUQUE CREEK, a tributary to the Missouri River, with a drainage area of 940 acres.
Despite being privately owned and not regulated by the state, Mcnair Lake Dam has a low hazard potential. The dam has not been rated for its condition, and the last inspection date is unknown. While an Emergency Action Plan (EAP) has not been prepared, the dam meets guidelines for safety and risk management measures have been established.
For water resource and climate enthusiasts, Mcnair Lake Dam offers an intriguing case study of a privately owned recreational dam in the Kansas City District. The dam's location on a tributary to the Missouri River highlights the interconnectedness of water resources in the region. With its low hazard potential and unknown condition assessment, the dam presents opportunities for further study and potential improvements in safety and risk management.
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 Mcnair Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Dardenne Creek At Ofallon | 46 cfs | → |
| Dardenne Creek At Old Town St. Peters | 37 cfs | → |
| Bonhomme Creek Near Clarkson Valley | 6 cfs | → |
| Bonhomme Creek Near Ellisville | 2 cfs | → |
| Caulks Creek At Chesterfield | 23 cfs | → |
| Cuivre River Near Troy | 669 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mcnair Lake Dam.
Boat launches
- Brittany Place 1, Lake Saint Louis
- Windjammer Point 200, Lake Saint Louis
- Katy Trail 1800, Saint Charles County
- Scott A Lewis Lane Cottleville
- East Sycamore Road Lincoln County
- Saint Charles County
Track Mcnair 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 Mcnair Lake Dam
Where does the data for Mcnair 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 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 Mcnair Lake Dam.