A lesson in reservoir risk management

More than 14,600 feet of solid-wall and perforated, dual-wall corrugated high-density polyethylene (HDPE) pipe provides a French drain-like system that keeps water from exerting pressure on a reservoir's geotextile liner. North Carolina's Franklin Water Treatment Plant Reservoir Expansion is a Plastics Pipe Institute 2011 Project of the Year. Photo: Plastics Pipe Institute

The new reservoir on the right is one of $200 million in water and sewer improvements Charlotte-Mecklenburg Utilities makes every year. The map at right shows some of the projects completed since 2000. Photo: Steve Montgomery, Skyshots.net

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