Freese and Nichols conducted the route study and designed a 38,000-linear-foot, 60-inch gravity wastewater interceptor for the North Texas Municipal Water District. The interceptor serves the cities of Plano, Frisco, Allen, Fairview and Richardson. The interceptor parallels an existing 60-inch sewer line and doubles the capacity of the fast-growth area.
FNI studied several routes to recommend one that did not require siphoning and addressed odor-control measures due to construction through populated areas. This project also included evaluation of material options to keep construction costs down and public involvement workshops to address citizens' concerns.