Ewing Lake Dam dam
Ewing Lake Dam
Ewing Lake Dam, located in Lewis County, Missouri, was completed in 1967 and serves as a crucial water supply source for the region. This earth and rockfill dam stands at a height of 39 feet and has a storage capacity of 881 acre-feet, with a normal storage level of 528 acre-feet. The dam is designed to control the flow of the Middle Fabius River, with a spillway width of 80 feet to manage maximum discharge levels.
The dam is owned and regulated by a private entity, with the Dam and Reservoir Safety Program overseeing its state-permitted inspections and enforcement. Despite being categorized as having a high hazard potential, the dam's condition assessment is rated as satisfactory. The risk assessment for Ewing Lake Dam is moderate, with a designated emergency action plan (EAP) in place, last revised in 2012. Regular inspections occur every three years to ensure the dam's structural integrity and public safety.
Ewing Lake Dam's strategic location and design make it a vital component of the local water infrastructure, providing essential water supply services while effectively managing the flow of the Middle Fabius River. Its satisfactory condition and moderate risk assessment, coupled with a robust EAP, demonstrate a commitment to maintaining the dam's operational efficiency and ensuring the safety of surrounding communities in the face of potential hazards.
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 Ewing Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Fabius River Near Taylor | 36 cfs | → |
| Wyaconda River Above Canton | 19 cfs | → |
| North River At Palmyra | 6 cfs | → |
| Bear Creek Near Marcelline | 17 cfs | → |
| Salt River Near Shelbina | 176 cfs | → |
| Fox River At Wayland | 53 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Ewing Lake Dam.
Track Ewing 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 Ewing Lake Dam
Where does the data for Ewing 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 Ewing Lake Dam.