Wellington Nap D-21b dam
Wellington Nap D-21b
Wellington Nap D-21b, located in Lafayette, Missouri, is a crucial water resource structure designed by the USDA NRCS in 1973. This earth dam serves primarily for flood risk reduction along the TR-Missouri River, with a height of 43 feet and a length of 400 feet. The dam has a storage capacity of 105 acre-feet, providing essential debris control and flood protection for the surrounding area.
Despite its significant role in managing water resources, Wellington Nap D-21b has been classified as having a low hazard potential but an unsatisfactory condition assessment as of March 2021. The dam's last inspection in December 2016 revealed the need for improvement, highlighting the importance of regular maintenance and monitoring to ensure its effectiveness in mitigating flood risks. With a moderate risk assessment rating, it is crucial for authorities to address any deficiencies promptly to enhance the dam's resilience against potential climate-related challenges.
As part of the Dam and Reservoir Safety Program, Wellington Nap D-21b is regulated, permitted, inspected, and enforced by the state of Missouri. With its critical role in flood protection and water management, ongoing risk assessment and maintenance measures are essential to safeguard the surrounding community and ensure the dam's continued effectiveness in the face of changing climatic conditions.
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 D-21b -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Blue River Near Lake City | 1,290 cfs | → |
| Crooked River Near Richmond | 300 cfs | → |
| East Fork Little Blue River Nr Blue Springs | 10 cfs | → |
| Blue River At Stadium Drive In Kc | 2,840 cfs | → |
| Missouri River At Kansas City | 81,000 cfs | → |
| Missouri River At Waverly | 50,100 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Wellington Nap D-21b.
Track Wellington Nap D-21b 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 D-21b
Where does the data for Wellington Nap D-21b 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 D-21b.