Grassy Creek Watershed Dam G- 82 Reservoir Report
Last Updated: December 6, 2025
Grassy Creek Watershed Dam G-82, located in Ewing, Missouri, is a vital structure designed by the USDA NRCS for flood risk reduction along the Little Grassy River.
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Summary
Completed in 1990, this earth dam stands at a height of 23 feet and a length of 333 feet, with a maximum storage capacity of 96 acre-feet. The dam serves multiple purposes including fire protection, stock and small fish pond, as well as enhancing fish and wildlife habitats in the area.
With a low hazard potential and a moderate risk assessment rating, Grassy Creek Watershed Dam G-82 has not been inspected since September 1999. Although not currently regulated by the state, the dam plays a crucial role in managing stormwater runoff and protecting the surrounding Lewis County community from potential flooding events. Despite its condition being listed as "Not Rated", the dam continues to serve as a key infrastructure for water resource management in the region, highlighting the importance of ongoing monitoring and maintenance to ensure its effectiveness in the face of changing climate conditions.
Year Completed |
1990 |
Dam Length |
333 |
Dam Height |
23 |
River Or Stream |
LITTLE GRASSY |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
23 |
Drainage Area |
128 |
Nid Storage |
96 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Fabius River Near Taylor
|
12cfs |
Wyaconda River Above Canton
|
13cfs |
North River At Palmyra
|
21cfs |
Salt River Near Shelbina
|
30cfs |
Bear Creek Near Marcelline
|
5cfs |
Fox River At Wayland
|
8cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Grassy Creek Watershed Dam G- 82