Grassy Creek Watershed Dam G-74, located in Lewis County, Missouri, was completed in 1996 with the primary purpose of flood risk reduction.
Wind
Humidity
This earth dam, standing at a height of 25 feet, serves the local community by providing a normal storage capacity of 42 acre-feet and a maximum storage of 169 acre-feet. The dam, designed by the USDA NRCS, spans 460 feet in length and has a spillway width of 40 feet for uncontrolled water release.
Despite being classified as having a low hazard potential, the dam has a moderate risk assessment rating of 3. With no recent condition assessment available, the structure's overall condition remains unrated. Grassy Creek Watershed Dam G-74 is not under state regulation or jurisdiction, and there have been no recent inspections since 1999. While the dam does not have outlet gates, associated structures, or an emergency action plan in place, it plays a crucial role in protecting the surrounding area from flooding and remains an essential asset for the community's safety and well-being.
Year Completed |
1996 |
Dam Length |
460 |
Dam Height |
25 |
River Or Stream |
GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
24 |
Drainage Area |
217.6 |
Nid Storage |
169 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
South Fabius River Near Taylor
|
12cfs |
North River At Palmyra
|
15cfs |
Wyaconda River Above Canton
|
13cfs |
Bear Creek Near Marcelline
|
5cfs |
Bear Creek At Hannibal
|
2cfs |
Salt River Near Shelbina
|
16cfs |