Grassy Creek Watershed Dam G-57, located in Lewis County, Missouri, was completed in 2005 by the USDA NRCS with the primary purpose of flood risk reduction.
Wind
Humidity
This earth dam stands at a height of 27 feet and has a structural height of 34 feet, spanning 445 feet in length. With a maximum storage capacity of 160.9 acre-feet and a normal storage of 37.3 acre-feet, the dam serves multiple purposes including fire protection, stock or small fish pond, fish and wildlife pond, in addition to flood risk reduction.
The dam is situated on Grassy Creek and is under the jurisdiction of the Rock Island District of the USACE. With a low hazard potential and a moderate risk assessment rating, the dam has not been rated for its condition. Despite not being state regulated or inspected, the dam serves as a vital infrastructure for the local government of Lewis County, Missouri. With an uncontrolled spillway type and outlet gates, the dam is designed to manage a maximum discharge of 219.6 cubic feet per second. Although the dam has not been assessed for its emergency action plan or inundation maps, it continues to play a crucial role in mitigating flood risks in the region.
Year Completed |
2005 |
Dam Length |
445 |
Dam Height |
27 |
River Or Stream |
GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
27 |
Drainage Area |
147.2 |
Nid Storage |
160.9 |
Structural Height |
34 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
Wyaconda River Above Canton
|
13cfs |
South Fabius River Near Taylor
|
12cfs |
North River At Palmyra
|
21cfs |
Bear Creek Near Marcelline
|
5cfs |
Fox River At Wayland
|
8cfs |
Salt River Near Shelbina
|
30cfs |