Citizens Energy Group's Dig Indy has been called the most significant environmental endeavor ever undertaken in Indianapolis. The federally mandated project, started in 2011 with a $2 billion price tag, includes a 28-mile long network of deep rock tunnels aimed at eliminating sewer overflows into area waterways.
WFYI's Taylor Bennett asked Engineering Manager Mike Miller and Citizens Energy Group Spokeswoman Laura O'Brien for an update.
