Anacostia river tunnel, USA

The Anacostia River Tunnel project, part of the “Clean Rivers” project of DC Water and built by Webuild, involved the construction of a 3.8 km-long hydraulic tunnel which, connected to the district’s network, contributes to reducing the volume of wastewater and runoff that flows into the Anacostia River by 98%.

In 2017, the project received the Award for Sustainability Initiative of the Year from the “International Tunneling and Underground Space Association”. In 2018, it won an Award of Merit from “Engineering News Record” (ENR).