Neb. Rev. Stat. § 14-1243
Any bridge commission of a city of the metropolitan class provided for in sections 14-1227 and 14-1244 may be dissolved by the city council at any time after the acquisition, construction, and equipment of any bridges under its care have been completed and all the costs of such bridges have been paid from the funds provided by the bond issues provided for in sections 14-1215 to 14-1217 and 14-1223. The city council shall assume the further duties in connection with any such bridges, including the operation, maintenance, and repair of such bridges, the administration of funds, the collection of tolls, and all other necessary or proper acts. At any time the city council may create a new bridge commission to effect any of the purposes authorized by sections 14-1201 to 14-1252.
Neb. Rev. Stat. § 14-1243