Grassy Creek Watershed Dam G-61a, located in Lewis County, Missouri, was completed in 2005 with a primary purpose of flood risk reduction.
Wind
Humidity
The dam, constructed by the Natural Resources Conservation Service, is an earth-type structure with a hydraulic height of 27 feet and a structural height of 36 feet. It has a normal storage capacity of 29.5 acre-feet and a maximum storage of 97 acre-feet.
The dam, situated on Grassy Creek, has a spillway type of 'Uncontrolled' with a spillway width of 30 feet. The dam length is 440 feet with a drainage area of 243.2 square miles. It has a hazard potential of 'Low' and a moderate risk assessment rating. The dam is in good condition and was last inspected in 2005. The emergency action plan for the dam has not been updated recently.
In the event of an emergency, the dam has uncontrolled outlet gates and an uncontrolled spillway type. Despite being rated as having a low hazard potential, the dam is subject to moderate risk according to the risk assessment. While the dam is well-maintained and in good condition, regular inspections and updates to the emergency action plan are essential to ensure its continued safety and effectiveness in flood risk reduction for the surrounding area.
Year Completed |
2005 |
Dam Length |
440 |
Dam Height |
27 |
River Or Stream |
GRASSY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
27 |
Drainage Area |
243.2 |
Nid Storage |
97 |
Structural Height |
36 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
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 |