The 230,000 residents of Lincoln, Neb., are straining the city's aging sewer system, and there's no relief in sight. The population increased by 30% since the system's last major expansion in 1974, and is expected to double by 2050. Not only do the managers of the Lincoln Wastewater System (LWWS) have to accommodate their current customers, they have to consider future residents. To do this, they created a master plan that identifies utility needs for 25 years (Tier I) and 50 years (Tier II) using population projections provided by the Lincoln-Lancaster County Planning Department. Based on the plan, LWWS issued a request for proposal for a design-bid-build project to significantly increase existing capacity and accommodate future waste-water flows to full build-out capacity.
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