Pm Johnston #1 is an earth dam located in Pickens County, Alabama, built in 1975. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 1,200 ft long, taller than 68% 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 Pm Johnston #1
The primary purpose of Pm Johnston #1 is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by P M Johnston (private). It impounds the Tr-seneca Creek near Aliceville.
The dam stands 30 feet tall and stretches 1,200 feet across, creates a reservoir covering 100 acres, has a maximum storage capacity of 947 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1975, the structure is well into its service life at over 50 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 | Alabama |
| County | Pickens |
| Nearest City | Aliceville |
| River/Stream | Tr-seneca Creek |
| Coordinates | 33.14972, -88.03333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 947 acre-ft |
| Max Storage | 947 acre-ft |
| Normal Storage | 786 acre-ft |
| Surface Area | 100 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | P M Johnston |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AL02243 |
| Federal ID | AL02243 |
| More Info | ASDSO on Alabama (no state dam safety program) |