Nehai Tonkayea Lake Dam dam
Nehai Tonkayea Lake Dam
Nehai Tonkayea Lake Dam, located in Keytesville, Missouri, is a private-owned structure that serves primarily for recreation purposes. Designed by George Carr and Robert Lewis, this Earth core type dam stands at 65 feet in height and stretches 1700 feet in length. Completed in 1970, the dam has a storage capacity of 9100 acre-feet and covers a surface area of 250 acres, making it a popular spot for water enthusiasts and nature lovers.
Managed by the DAM AND RESERVOIR SAFETY PROG, the Nehai Tonkayea Lake Dam is regulated and inspected by the state of Missouri to ensure its safety and compliance with standards. The dam poses a low hazard potential and has been assessed to be in satisfactory condition as of December 2007. Despite being constructed over five decades ago, the dam continues to provide recreational opportunities for visitors, with its serene surroundings and ample water storage capacity.
With a moderate risk assessment rating, the Nehai Tonkayea Lake Dam remains a vital water resource in the region, offering both environmental benefits and recreational activities for the community. As the dam continues to be monitored and maintained by state regulators, visitors can enjoy the beauty of the TR-MUSSEL FORK river while appreciating the engineering marvel that is Nehai Tonkayea Lake Dam.
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 Nehai Tonkayea Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mussel Fork Near Musselfork | 362 cfs | → |
| Chariton River Near Prairie Hill | 9,160 cfs | → |
| East Fork Little Chariton R. Nr Huntsville | 7 cfs | → |
| Grand River Near Sumner | 73,900 cfs | → |
| East Fork Little Chariton R. Nr Macon | 81 cfs | → |
| Missouri River At Glasgow | 132,000 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Nehai Tonkayea Lake Dam.
Boat launches
- Chariton County
- Macon County
- State Highway M Bosworth
- Crown Drive Linn County
- Visitor Center Road Macon County
Track Nehai Tonkayea 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 Nehai Tonkayea Lake Dam
Where does the data for Nehai Tonkayea 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 Nehai Tonkayea Lake Dam.