Gradient Presenting at World of Coal Ash (WOCA), May 13-16, 2024 ”Evaluating Surface Impoundment Closure Alternatives Using Relative Impact Assessment – Two Case Study Examples” Gradient Authors: Andrew Bittner and Qian Zhang ”Corrective Action Sustainability: Holistic Decision Support Tool” Gradient Authors: John Kondziolka, Ari Lewis, and Andrew Bittner