Grassy Creek Watershed Dam G- 84 Reservoir Report
Last Updated: December 5, 2025
Grassy Creek Watershed Dam G- 84, located in Lewis County, Missouri, was completed in 1999 by the USDA NRCS and serves as a vital structure for flood risk reduction along the Little Grassy River.
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Summary
This earth dam stands at a height of 24.8 feet, with a hydraulic height of 24 feet and a structural height of 40 feet. With a storage capacity of 182 acre-feet, this dam plays a crucial role in managing water flow and protecting the surrounding area from potential flooding events.
Despite its low hazard potential, Grassy Creek Watershed Dam G- 84 is well-maintained and has not been rated for its condition assessment. The dam is equipped with an uncontrolled spillway and has a maximum discharge capacity of 294 cubic feet per second. While the dam has not undergone recent inspections, it remains a key component of flood risk management in the region, with a moderate risk assessment rating of 3. Owned and operated by the local government, this dam represents a collaborative effort to safeguard the community and its resources from the impacts of extreme weather events and ensure the long-term sustainability of the area's water resources.
As water resource and climate enthusiasts, the Grassy Creek Watershed Dam G- 84 serves as a prime example of the importance of infrastructure in mitigating the effects of climate change and preserving vital water resources. With its primary purpose of flood risk reduction and additional functions such as fire protection and wildlife habitat enhancement, this dam showcases the intersection of environmental conservation and disaster resilience. By understanding and supporting structures like Grassy Creek Watershed Dam G- 84, we can work towards a more sustainable future for both our communities and the natural world around us.
Year Completed |
1999 |
Dam Length |
590 |
Dam Height |
24.8 |
River Or Stream |
LITTLE GRASSY |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
24 |
Drainage Area |
384 |
Nid Storage |
182 |
Structural Height |
40 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
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 |
Salt River At Hagers Grove
|
1cfs |
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- 84