Riley Dam is an earth dam located in Adams County, Mississippi, built in 1993. It carries a Low hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 143 ft long, taller than 55% 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 Riley Dam
The primary purpose of Riley Dam 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 William F. Riley (private). It impounds the Unt of Kittering near Natchez.
The dam stands 26 feet tall and stretches 143 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 31 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1993, the structure is 33 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 | Mississippi |
| County | Adams |
| Nearest City | Natchez |
| River/Stream | Unt of Kittering |
| Coordinates | 31.53553, -91.34900 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 143 ft |
| Year Completed | 1993 (33 years old) |
Storage & Hydraulics
| NID Storage | 31 acre-ft |
| Max Storage | 31 acre-ft |
| Normal Storage | 14 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 88 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | William F. Riley |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MS03306 |
| Federal ID | MS03306 |
| More Info | State Dam Safety Program |