Rubber duckbill design of Proco check valve solves water hammer problems for Town of Boone, N.C. The Jimmy Smith Wastewater Treatment Plant (WTP) is located in Boone, N.C., a town of 17,000 that sits at an elevation of about 3,300 ft. With a permitted capacity of 4.82 million gpd, the plant serves Boone as well Continue reading