Thermodynamic Modeling & Policy Relevance As regulatory discussions and technical feasibility studies for the Svystunova Gully mine-water retention system (2026–2027 period) get underway, integrating rigorous thermodynamic modeling into the engineering baseline is critical. Simple dilution metrics do not account for mass-balance limits, bedrock dissolution, concrete leaching, or secondary mineral precipitation along the waterway. Following today’s session of the government interdepartmental working group, I submitted key findings from my open-access research to support evidence-based decisions. The submitted package includes speciation models, phase equilibria calculations, and reactive transport assessments focused on mining wastewater management and dam stability evaluation. #Hydrogeology #Geochemistry #WaterManagement #PHREEQC #DataScience #EnvironmentalEngineering #OpenScience #Mining #SvystunovaGully #Ukraine #KryvyiRihBasin