National is a rockfill dam located in St. Clair County, Alabama, built in 1944. It carries a Significant hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 300 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About National
The primary purpose of National is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by National Cement Co (private). It impounds the Tr Trout Creek near Morning Star.
The dam stands 12 feet tall and stretches 300 feet across, and has a maximum storage capacity of 53 acre-feet. Completed in 1944, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Alabama |
| County | St. Clair |
| Nearest City | Morning Star |
| River/Stream | Tr Trout Creek |
| Coordinates | 33.72500, -86.15667 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 12 ft |
| Dam Length | 300 ft |
| Year Completed | 1944 (82 years old) |
Storage & Hydraulics
| NID Storage | 53 acre-ft |
| Max Storage | 53 acre-ft |
| Normal Storage | 30 acre-ft |
| Max Discharge | 250 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | National Cement Co |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL01072 |
| Federal ID | AL01072 |
| More Info | ASDSO on Alabama (no state dam safety program) |