Upper Little Black Watershed Dam D- 9 is an earth dam located in Butler County, Missouri, built in 1985. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 570 ft long, taller than 76% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Upper Little Black Watershed Dam D- 9
The primary purpose of Upper Little Black Watershed Dam D- 9 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Upper Little Blk Wrshsub (local government). It impounds the Tr-little Black River near Naylor.
The dam stands 33 feet tall and stretches 570 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 313 acre-feet, and collects water from a drainage area of 220 square miles. Completed in 1985, the structure is 41 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Missouri |
| County | Butler |
| Nearest City | Naylor |
| River/Stream | Tr-little Black River |
| Coordinates | 36.69044, -90.61728 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 570 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 313 acre-ft |
| Max Storage | 313 acre-ft |
| Normal Storage | 88 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 220 sq mi |
| Max Discharge | 426 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Upper Little Blk Wrshsub |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31943 |
| Federal ID | MO31943 |
| More Info | State Dam Safety Program |