Grassy Creek Watershed Dam G- 62 Reservoir Report
Last Updated: December 25, 2025
Grassy Creek Watershed Dam G-62, also known as Str G-62, is a local government-owned structure located in Lewis, Missouri, specifically in the city of Ewing.
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Summary
This earth-type dam, designed by the USDA NRCS and completed in 1987, serves the primary purpose of flood risk reduction along the TR-Grassy Creek. With a height of 20 feet and a length of 430 feet, the dam has a storage capacity of 66 acre-feet and covers a drainage area of 364.8 square miles.
Despite its low hazard potential, the dam poses a moderate risk, as assessed by experts. It features an uncontrolled spillway, with a width of 20 feet, and is currently deemed to be in "Not Rated" condition. The dam has not been subjected to a recent inspection, and there is no Emergency Action Plan (EAP) in place. While there are no associated structures or outlet gates, the dam's design, construction, and operation fall under the purview of the Natural Resources Conservation Service.
For water resource and climate enthusiasts, Grassy Creek Watershed Dam G-62 presents an intriguing case study in flood risk management. Its location, design, and functionality contribute to the broader understanding of water infrastructure in the region and highlight the importance of proactive maintenance and monitoring to ensure the safety and effectiveness of such structures. As discussions around climate change and extreme weather events continue to evolve, the role of dams like G-62 in mitigating flood risks becomes increasingly significant in safeguarding communities and natural resources.
Year Completed |
1987 |
Dam Length |
430 |
Dam Height |
20 |
River Or Stream |
TR-GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
20 |
Drainage Area |
364.8 |
Nid Storage |
66 |
Structural Height |
21 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wyaconda River Above Canton
|
13cfs |
South Fabius River Near Taylor
|
12cfs |
North River At Palmyra
|
11cfs |
Bear Creek Near Marcelline
|
5cfs |
Salt River Near Shelbina
|
20cfs |
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- 62