DC Water is doing exploratory drilling in Rock Creek Park in preparation for the Piney Branch sewage project.

The tunnel will help make the Anacostia River safe to swim and fish in.

Three major tunnels down for the Clean Rivers Project, one to go.

DCist descends 160 feet into the earth to find out what’s going on down under Bloomingdale.

DC Water’s massive tunnel boring machine emerges after two years, four-and-a-half miles of tunneling.

A massive tunnel boring machine will start digging a Metro-sized tunnel under the Potomac River soon as a means to store runoff and sewage from heavy storms.