ABSTRACT
Sewers are underground conduits for conveying wastewater to the treatment facilities or to the point of disposal. There are three types of sewers: sanitary, storm, and combined. This chapter presents an overview of the design and construction procedures of sanitary sewers. It presents design examples covering step-by-step calculations, sewer profiles, construction details, and operation and maintenance of sewer lines. These sewer lines are diversion sewer from the stabilization pond area, diversion sewer from the trickling filter plant area, existing intercepting sewer from the central part of the town, final sewer line carrying the total flow from the junction box to the bar screen. The sewer lines include the bypass sewer to direct the flow from the junction box to the storage basin during power outages when the pumping equipment is temporarily inoperable. All sewer lines shall be tested as specified for tightness, infiltration, and exfiltration between the consecutive manholes.
