Any necessity of taking property for the city by condemnation shall be determined by the council and declared by a resolution of the council describing the property and stating the uses to which it shall be devoted.

The procedure for making, altering, vacating or abandoning a public improvement shall be governed by general laws of the state.

The procedure for levying, collecting, and enforcing the payment of special assessments for public improvements or other services to be charged against real property shall be governed by general ordinance.

Except as may be allowed by Oregon Revised Statutes or applicable Attorney General Model Rules regulating public contracting, a contract in excess of $50,000 for public improvement to be made by a private contractor shall be let to the lowest responsive and responsible bidder for the contract and shall be done in accordance with plans and specifications approved by the council or by the city manager and city engineer.