How to Clean a Tunnel, 300 ft. under Milwaukee

Milwaukee Journal-Sentinel, December 31, 2011

Veolia's water and environmental services experts are working together to clean Milwaukee's "deep tunnel." A crane will lower Veolia workers over 300 feet underground, marking the first time that the trash - enoughto fill over 800 residential garbage carts—will be removed in nearly two decades.

Read more at "Deep Tunnel to Get a Good Cleaning"