Grassy Creek Watershed Dam G- 96 Reservoir Report
Last Updated: December 19, 2025
Grassy Creek Watershed Dam G-96, located in Marion, Missouri, was completed in 1994 by the USDA NRCS and serves primarily for flood risk reduction.
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Summary
This earth dam stands at a height of 31 feet and stretches 480 feet in length, with a storage capacity of 139 acre-feet. The dam overlooks the Grassy Creek, offering protection to the surrounding area from potential flooding events.
Despite being classified as having a low hazard potential, the dam's risk assessment is moderate, highlighting the importance of ongoing monitoring and maintenance. The dam is not state-regulated or permitted, with no official inspections or enforcement in place. The spillway, with a width of 30 feet, is uncontrolled, and there are no outlet gates associated with the structure.
Overall, Grassy Creek Watershed Dam G-96 plays a crucial role in flood risk reduction in the area, although it lacks certain regulatory oversight. With its low hazard potential and moderate risk assessment, continued attention to monitoring and maintenance is essential to ensure the dam's effectiveness and safety for the community it serves.
Year Completed |
1994 |
Dam Length |
480 |
Dam Height |
31 |
River Or Stream |
GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
31 |
Drainage Area |
220 |
Nid Storage |
139 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Fabius River Near Taylor
|
12cfs |
North River At Palmyra
|
15cfs |
Wyaconda River Above Canton
|
13cfs |
Bear Creek At Hannibal
|
2cfs |
Bear Creek Near Marcelline
|
5cfs |
Salt River Near Center
|
63cfs |
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- 96