Sedimentation Pond No 9 is an earth dam located in Leon County, Texas. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall. 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 Sedimentation Pond No 9
The primary purpose of Sedimentation Pond No 9 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 Texas Westmoreland Coal Co (private). It impounds the Mine Creek.
The dam stands 23 feet tall, creates a reservoir covering 10 acres, has a maximum storage capacity of 986 acre-feet, and collects water from a drainage area of 3 square miles.
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 | Texas |
| County | Leon |
| River/Stream | Mine Creek |
| Coordinates | 31.37111, -96.28333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
Storage & Hydraulics
| NID Storage | 986 acre-ft |
| Max Storage | 986 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Tailings |
| Owner | Texas Westmoreland Coal Co |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX09121 |
| Federal ID | TX09121 |
| More Info | State Dam Safety Program |