The superintendent shall oversee and supervise the operation and maintenance of the sewer system, the making of repairs of all kinds, the construction of all extensions and additions, and all construction work of whatever nature in connection with the present sewer system, and any systems now under construction or any new systems that may be established. The superintendent shall at all times be subject to the direction and authority of the mayor. (Ord. 147 § 2.03, 1963)