DC Water takes big step forward in Potomac River Tunnel project

D.C. Water is making progress with an initiative that aims to clean up the District’s waterways — the Potomac River tunnel project.

On Tuesday, a multiton cutter head was lowered to the bottom of a 100-foot shaft at West Potomac Park to attach to a tunnel-boring machine.

It’s one of two machines that will mine through soil to construct the 5.5-mile long tunnel from the Georgetown waterfront to the Blue Plains water treatment facility in Southwest.

“We are basically lifting...