Grassy Creek Watershed Dam G-39, located in Lewis County, Missouri, was completed in 1998 with a primary purpose of flood risk reduction.
Wind
Humidity
Managed by the local government and designed by USDA NRCS, this earth dam stands at a height of 27 feet and has a storage capacity of 85 acre-feet. The dam is situated on the Grassy Creek and is part of the Rock Island District.
With a low hazard potential and a moderate risk assessment rating, Grassy Creek Watershed Dam G-39 serves multiple purposes including fire protection, stock or small fish pond, fish and wildlife pond, in addition to flood risk reduction. The spillway, which is uncontrolled, has a width of 20 feet to manage a maximum discharge of 177 cubic feet per second. Despite not being state regulated, the dam is inspected periodically to ensure its structural integrity and safety.
This dam, constructed with stone core and soil foundation, covers a drainage area of 38.4 square miles and has a normal storage capacity of 23 acre-feet. While the dam is not currently rated for its condition, it remains a crucial infrastructure for managing water resources and mitigating flood risks in the Grassy Creek watershed.
Year Completed |
1998 |
Dam Length |
480 |
Dam Height |
27 |
River Or Stream |
GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
27 |
Drainage Area |
38.4 |
Nid Storage |
85 |
Structural Height |
38 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
Wyaconda River Above Canton
|
13cfs |
South Fabius River Near Taylor
|
12cfs |
North River At Palmyra
|
21cfs |
Salt River Near Shelbina
|
30cfs |
Fox River At Wayland
|
8cfs |
Bear Creek Near Marcelline
|
5cfs |