Upper Little Black Watershed Dam D- 7
Upper Little Black Watershed Dam D- 7 is an earth dam located in Ripley County, Missouri, built in 1990. It carries a Low hazard potential classification.
About Upper Little Black Watershed Dam D- 7
The primary purpose of Upper Little Black Watershed Dam D- 7 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 Black Watershed S (local government). It impounds the Last Chance Hollow near Naylor.
The dam stands 44 feet tall and stretches 700 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 429 acre-feet, and collects water from a drainage area of 1,025 square miles. Completed in 1990, the structure is 36 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. The most recent inspection on record was 07/01/1993. That was over 32 years ago.
At 44 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Missouri |
| County | Ripley |
| Nearest City | Naylor |
| River/Stream | Last Chance Hollow |
| Coordinates | 36.71943, -90.64154 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 35 ft |
| Dam Length | 700 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 429 acre-ft |
| Max Storage | 429 acre-ft |
| Normal Storage | 106 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 1,025 sq mi |
| Max Discharge | 35 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | UPPER LITTLE BLACK WATERSHED S |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 07/01/1993 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50327 |
| Federal ID | MO50327 |
| More Info | State Dam Safety Program |