The council shall have the power to create, open and improve any public square, street, avenue, alley or other highway, old or new, and also vacate or discontinue the same whenever deemed necessary or expedient; provided, that all damages sustained by the citizens of the city, or the owners of the property therein, shall be ascertained as prescribed in that portion of this division relating to the condemnation of private property for public use; and provided further, that whenever any public square, street, avenue, alley or other highway shall be vacated, the same shall revert to the owners of adjacent lots in proportions as it was taken from them; and still further provided, that when the grade of any street or alley shall have been once established by ordinance, it shall not be lawful to change such grade without making compensation to all persons owning real estate on such street, square, avenue, alley or other highway who may be damaged by such change of grade, to be determined and governed in all respects with reference to benefits and damages as is provided in this chapter.

(Code 1964, § 14.300)