The DigIndy sewer overflow project created nearly 30 miles of wastewater tunnels deep beneath Indianapolis, beginning in 2012. The last tunnel work should finish this year.

In 1946, an aqueduct and a water-side grist mill became the Whitewater Canal State Historic Site, about a 80-minute drive southeast of downtown Indianapolis.

Nearly a football field below the surface of the Citizens Energy Southport Wastewater Treatment Plant is a huge, man-made ...

After decades of work, a massive tunnel system now runs 270 feet under the city's streets — all to keep rivers clean.

A look inside this underground Indy tunnel project ...