Lincoln County Hydraulic Model and East Lincoln Transmission Main


The Lincoln County water supply system distributed water from its water treatment plant to approximately 12,000 service connections across the county and adjacent areas. The existing WTP received a capacity expansion from 3.99 million gallons per day to 8 MGD to meet the community’s growing demand.

Woolpert loaded anticipated growth into a hydraulic model to identify future pressure and flow limitations in Lincoln County’s eastern pressure zone. Due to limitations in the existing pipe system, the number of connections and future capacity needs to support ongoing development, a 2018 report recommended disconnecting the WTP from the EPZ’s distribution system and constructing a transmission main to connect the WTP to the East Lincoln elevated storage tank and Denver tank.

Woolpert was contracted to design the 4.8-mile water transmission main between the Lincoln County WTP and the East Lincoln elevated storage tank. Keeping the existing distribution system in place prevented disruptions to customer service while enabling expedited construction. This configuration also alleviated stress on the portions of the existing distribution system that experienced more breaks than average.

Lincoln County Public Works Department

Lincoln County, NC


  • Hydraulic modeling
  • Civil engineering
  • Permitting assistance
  • Bid phase support
  • Construction administration