Grassy Creek Watershed Dam G-87, located in Ewing, Missouri, was completed in 1993 with a primary purpose of flood risk reduction.
Wind
Humidity
Managed by the local government, this earth dam stands at a height of 27 feet and has a length of 480 feet, with a maximum storage capacity of 65 acre-feet and a normal storage capacity of 17 acre-feet. The dam, designed by the USDA NRCS, is situated on Grassy Creek, within the Rock Island District. Despite its low hazard potential, the dam has not been rated for its condition.
With a drainage area of 416 square miles and a maximum discharge of 93.3 cubic feet per second, Grassy Creek Watershed Dam G-87 plays a crucial role in managing water flow and mitigating flood risks in the region. Its spillway, which is uncontrolled and 20 feet wide, helps regulate water levels during high-flow events. Although the dam has not been inspected since September 1999, it is maintained in a condition that ensures its functionality for flood risk reduction. The dam's risk assessment indicates a moderate level of risk, highlighting the importance of ongoing monitoring and maintenance to ensure its effectiveness in protecting the surrounding area from potential flooding events.
Year Completed |
1993 |
Dam Length |
480 |
Dam Height |
27 |
River Or Stream |
GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
27 |
Drainage Area |
416 |
Nid Storage |
65 |
Structural Height |
29 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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 |
Bear Creek At Hannibal
|
2cfs |