As Singapore has grown in the last 20 years, so has its waste problems. To meet the environmental demands associated with continued economic and population growth, the Public Utilities Board sought to replace the nation's entire sanitary services infrastructure with one that can handle wastewater needs for the next 100 years.

PB, in joint venture, has helped to meet this challenge through the island’s new Deep Tunnel Sewerage System (DTSS), a complex and groundbreaking undertaking that surpasses the existing infrastructure in reliability, ease and economy of operation. The gravity-fed, island-wide system—with built-in growth capacity and water quality improvements—will be critical to handling Singapore's burgeoning waterfront renaissance.

The project, which features contractors and design consultants from eight countries, "is truly an international effort," according to Richard Flanagan, who served as Engineering Manager for the joint venture. "And it's not a piecemeal effort. It's a complete conversion to a new infrastructure—quite a feat in a relatively short time for this nation."