Upper Little Black Watershed Dam A-5, also known as Site A-5, is a local government-owned structure located in Naylor, Missouri, within Butler County.
Wind
Humidity
Situated along the Little Black River, this earth dam stands at a height of 34 feet and serves the primary purpose of flood risk reduction. Constructed in 1990 by the USDA NRCS, this dam has a maximum storage capacity of 570 acre-feet and a normal storage capacity of 111 acre-feet, helping to mitigate potential flooding in the area.
With a hydraulic height of 31 feet and a structural height of 46 feet, Upper Little Black Watershed Dam A-5 spans 730 feet in length and covers a surface area of 5 acres. The dam's spillway, measuring 30 feet in width, is uncontrolled and capable of handling a maximum discharge of 33 cubic feet per second. Despite its low hazard potential and moderate risk assessment rating, the dam's condition remains unrated as of the last inspection conducted in July 1993. While it currently lacks outlet gates, associated structures, and a detailed emergency action plan, this dam continues to play a crucial role in flood risk management for the surrounding area, showcasing the importance of sustainable water resource management in the face of changing climate conditions.
Year Completed |
1990 |
Dam Length |
730 |
Dam Height |
34 |
River Or Stream |
LITTLE BLACK RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
31 |
Drainage Area |
301 |
Nid Storage |
570 |
Structural Height |
46 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
46 |
Little Black River Below Fairdealing
|
113cfs |
Black River At Poplar Bluff
|
858cfs |
Current River At Doniphan
|
1900cfs |
Black River Near Corning
|
789cfs |
Black River At Leeper
|
508cfs |
St. Francis River At Wappapello
|
695cfs |