Wellington Nap A-21 dam
Wellington Nap A-21
Wellington Nap A-21, also known as Wellington Nap Site A-21 Dam, is a crucial water resource structure located in Lafayette, Missouri. Constructed in 1966 by the USDA NRCS, this earth dam stands at a height of 52 feet and stretches for 520 feet, serving the primary purpose of water storage. With a normal storage capacity of 343 acre-feet and a maximum discharge rate of 3246 cubic feet per second, the dam plays a vital role in managing the flow of the TR BIG SNI-A-BAR CREEK.
Managed by the local government and regulated by the DAM AND RESERVOIR SAFETY PROG, Wellington Nap A-21 has a low hazard potential and is deemed to be in satisfactory condition as per its last assessment in 2017. Despite being uncontrolled, the dam is equipped with a 50-foot spillway to facilitate excess water release. With a drainage area of 426 square miles, the dam provides essential flood control and water supply benefits to the surrounding area, making it a critical component of the region's water resource infrastructure.
In the realm of water resource and climate management, Wellington Nap A-21 stands as a testament to effective engineering and stewardship. As a key feature in the Kansas City District's water management system, this earth dam continues to play a vital role in safeguarding the local community against flooding and ensuring a sustainable water supply. Its strategic location, design, and operational efficiency make it a valuable asset in the broader context of water resource management and climate resilience efforts in Missouri.
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 Wellington Nap A-21 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Crooked River Near Richmond | 52 cfs | → |
| Little Blue River Near Lake City | 364 cfs | → |
| East Fork Little Blue River Nr Blue Springs | 10 cfs | → |
| Missouri River At Waverly | 41,400 cfs | → |
| Blue River At Stadium Drive In Kc | 1,070 cfs | → |
| Wakenda Creek At Carrollton | 273 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Wellington Nap A-21.
Track Wellington Nap A-21 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 Wellington Nap A-21
Where does the data for Wellington Nap A-21 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 Wellington Nap A-21.