Nebraska Revised Statute 14-365.08
Whenever the governing body of any metropolitan city shall have ordered the installation of a sewerage system, including any storm sewer system, and sewage disposal plant or the improvement or extension of an existing system, the fact that such order was issued shall be recited in the official minutes of the governing body. The said body shall thereupon require that plans and specifications be prepared of such sewerage system, including any storm sewer system, and sewage disposal plant, or such improvement or extension. Upon approval of such plans, the governing body shall thereupon advertise for sealed bids for the construction of said improvements once a week three consecutive weeks in a legal paper published in or of general circulation within said municipality. The contract for such construction shall be awarded to the lowest responsible bidder.
Laws 1953, c. 24, § 8, p. 102.