Nebraska Revised Statutes Chapter 16. Cities of the First Class § 16-6,106. Powers

(1) Procure and contract for professional and technical assistance of all kinds;

(2) Build, construct, alter, modify, and improve, using either its own employees, equipment, and facilities or by contract with others, dams, dikes, levees, drainways, channels, structures, devices, storm water sewers and systems, and works of all kinds and appurtenances thereto all without any limitation whatsoever, including extensions, additions, and improvements and alterations of any such existing facilities, for the control, management, drainage, and disposal of flood, storm, or surface waters, both within and without the city as in the discretion of the city council may be required for the protection, benefit, and welfare of the city and its inhabitants and their property; and

(3) Acquire by purchase, lease, gift, and contract and through the exercise of the right of eminent domain all lands, structures, easements, rights-of-way, or other property real or personal both within and without the city as may in the discretion of the city council be required or useful in connection with any such plan or program and the implementation thereof.