Residents raise hydrogeology and silica-dust concerns; say dye-tracing hasn’t been done

Residents raised technical concerns about subsurface water movement and airborne silica from quarry operations, saying uncertainty about groundwater connections increases environmental risk.

A participant who described local karst terrain said they had not been informed about dye-tracing studies and that limestone caves and underground channels can carry quarry discharges unpredictably. "I spoke with Daniel ... about dye tracing and, I was not told that dye trace had been formed," the speaker said, urging the agency to require hydrogeologic testing before expansion.

Separately, a farming-area resident described a haze of silica dust traveling downstream into Dry Creek and Smith Fork and said the material reaches farmland and can affect livestock. Commenters called for careful study of both airborne and waterborne transport pathways before any permit extension is approved.