Part of the new sludge line twinning project required routing the new piping through the existing congested piping within the plant, and through a utility tunnel below the surface of the North Saskatchewan River. 

Installing a new sludge pumping station was also necessary to pump the digested sludge to the Clover Bar sewage lagoons. Morrison Hershfield prepared detailed design drawings and specifications of the piping and connections within the digester squares, through the congested existing piping within the Gold Bar wastewater treatment plant tunnel system and in the underground tunnel crossing the North Saskatchewan River.