Neb. Rev. Stat. § 14-1229: Neb. Rev. Stat. § 14-1229

No contract or agreement for the acquisition, construction, reconstruction, repair, enlargement, extension, renewal, replacement, or equipment of any bridge as provided in section 14-1228 exceeding twenty-five hundred dollars shall be made without advertisement for public bids and an award made to the best bidder. The bridge commission shall have the authority to reject any or all bids.