At this point, the river already flows in a concrete channel.

It now flows through a concrete channel on a fixed course.

From there it flows southeast through a series of concrete lined channels and drains.

In the 1920s, the stretch near Germantown was placed into a concrete channel.

In the town centre it has been confined since the 1970s in a concrete channel and partially covered.

A concrete channel wraps around the base of the cone to collect storm water.

Within the borough the stream is in a concrete channel, including a covered portion.

Sitting under a bridge over one of L.A.'s many concrete channels, they talk.

It then is altered to flow in a concrete channel.

The ephemeral creek was lined with a concrete channel in areas and flooded during heavy rain events.