CCR RULE COMPLIANCE
Data and Information
Alliant Energy's CCR Rule Compliance Data and Information
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Columbia
Surface Impoundment
Design Criteria
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Hazard Potential Classification - May 2021
Periodic Safety Factor Assessment - October 2020
Periodic Structural Stability Assessment - October 2020
Initial Safety Factor Assessment - September 2016
Initial Structural Stability Assessment - September 2016
History of Construction - 2016
Liner Type Documentation - 2016
Initial Hazard Potential Classification - September 2016