Neb. Rev. Stat. § 17-529: Neb. Rev. Stat. § 17-529

Cities of the second class and villages shall have power (1) to establish and alter the channel of watercourses and to wall them and cover them over, (2) to establish, regulate, and provide for the filling of wells, cisterns and windmills, aqueducts, and reservoirs of water, and (3) to erect and maintain a dike or dikes as protection against flood or surface waters.