Upper Little Black Watershed Dam D- 3
Upper Little Black Watershed Dam D- 3 is an earth dam located in Ripley County, Missouri, built in 1981. It carries a Low hazard potential classification.
About Upper Little Black Watershed Dam D- 3
The primary purpose of Upper Little Black Watershed Dam D- 3 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 Blk Wtsh Subdist (local government). It impounds the Tr-little Black River near Naylor.
The dam stands 31 feet tall and stretches 500 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 308 acre-feet, and collects water from a drainage area of 1,133 square miles. Completed in 1981, the structure is 45 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.
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Location
| State | Missouri |
| County | Ripley |
| Nearest City | Naylor |
| River/Stream | Tr-little Black River |
| Coordinates | 36.70403, -90.67162 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 29 ft |
| Dam Length | 500 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 308 acre-ft |
| Max Storage | 308 acre-ft |
| Normal Storage | 87 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 1,133 sq mi |
| Max Discharge | 486 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | UPPER L BLK WTSH SUBDIST |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31978 |
| Federal ID | MO31978 |
| More Info | State Dam Safety Program |