Upper Little Black Watershed Dam D- 1 is an earth dam located in Ripley County, Missouri, built in 1986. It carries a Low hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 760 ft long, taller than 80% 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- 1
The primary purpose of Upper Little Black Watershed Dam D- 1 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 L Blck Wtsh Subdis (local government). It impounds the Tr-little Black River near Naylor.
The dam stands 35 feet tall and stretches 760 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 785 acre-feet, and collects water from a drainage area of 145 square miles. Completed in 1986, the structure is 40 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 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Missouri |
| County | Ripley |
| Nearest City | Naylor |
| River/Stream | Tr-little Black River |
| Coordinates | 36.72499, -90.70307 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 33 ft |
| Dam Length | 760 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 785 acre-ft |
| Max Storage | 785 acre-ft |
| Normal Storage | 179 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 145 sq mi |
| Max Discharge | 832 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Upper L Blck Wtsh Subdis |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50441 |
| Federal ID | MO50441 |
| More Info | State Dam Safety Program |