Sp-4 Dam is an earth dam located in Choctaw County, Mississippi, built in 2004. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 2,695 ft long. 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 Sp-4 Dam
The primary purpose of Sp-4 Dam is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Andy Johnson, Jr., Jimmy Carl Johnson, Betty Fay Brooks (private). It impounds the Unt of Middle Bywy Creek.
The dam stands 23 feet tall and stretches 2,695 feet across, creates a reservoir covering 81 acres, has a maximum storage capacity of 1,110 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2004, the structure is relatively new.
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 | Choctaw |
| River/Stream | Unt of Middle Bywy Creek |
| Coordinates | 33.40483, -89.24120 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 18 ft |
| Dam Length | 2,695 ft |
| Year Completed | 2004 (22 years old) |
Storage & Hydraulics
| NID Storage | 1,110 acre-ft |
| Max Storage | 1,110 acre-ft |
| Normal Storage | 563 acre-ft |
| Surface Area | 81 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 211 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Tailings |
| Owner | Andy Johnson, Jr., Jimmy Carl Johnson, Betty Fay Brooks |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MS03651 |
| Federal ID | MS03651 |
| More Info | State Dam Safety Program |