Indiana Code Title 36. Local Government § 36-9-1-8

(1) sewage treatment plants;

(2) intercepting sewers;

(3) main sewers;

(4) submain sewers;

(5) local sewers;

(6) lateral sewers;

(7) outfall sewers;

(8) storm sewers;

(9) force mains;

(10) pumping stations;

(11) ejector stations;

(12) any other structures necessary or useful for the collection, treatment, purification, and sanitary disposal of the liquid waste, solid waste, sewage, storm drainage, and other drainage of a municipality; and

(13) for purposes of IC 36-9-25, overhead plumbing or backflow prevention devices that are financed in whole or in part through assistance provided under IC 36-9-25-42.