Slurry Impoundment - Johns Washer
Slurry Impoundment - Johns Washer is an earth dam located in Jefferson County, Alabama, built in 1979. It carries a Low hazard potential classification.
About Slurry Impoundment - Johns Washer
Slurry Impoundment - Johns Washer is a dam in Jefferson, Alabama. The dam is owned by Black Diamond Coal Co (private). It impounds the Tr-blue Creek near North Johns.
The dam stands 80 feet tall and stretches 540 feet across, and has a maximum storage capacity of 44 acre-feet. Completed in 1979, the structure is 47 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.
At 80 feet, this dam is taller than 97% of all dams in the United States.
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Location
| State | Alabama |
| County | Jefferson |
| Nearest City | North Johns |
| River/Stream | Tr-blue Creek |
| Coordinates | 33.36167, -87.10333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 80 ft |
| Dam Length | 540 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 44 acre-ft |
| Max Storage | 44 acre-ft |
| Normal Storage | 27 acre-ft |
| Max Discharge | 306 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | BLACK DIAMOND COAL CO |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL01573 |
| Federal ID | AL01573 |
| More Info | State Dam Safety Program |