Basin `b'

About Basin `b'

The primary purpose of Basin `b' 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 Dynegy Miami Fort, Llc (public utility). It impounds the Ohio River - Offstream near Lawrenceburg, Indiana.

The dam stands 50 feet tall and stretches 4,800 feet across, has a maximum storage capacity of 830 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1981, the structure is 45 years old.

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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/06/2021.

At 50 feet, this dam is taller than 93% of dams nationwide.

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