Environmental Services will begin construction soon on 7,600 feet of an eight-inch sewer in Terwilliger Boulevard from SW Northgate Avenue to Highway 43. The new Terwilliger sewer will connect to the 30-inch Tryon Interceptor sewer, which carries sewage to the Tryon Creek Wastewater Treatment Plant in Lake Oswego. This improvement to Portlands wastewater collection system will help protect water quality, public health, and the environment.