Whenever the legislative body of any municipality shall determine that it is necessary to acquire, open or widen any boulevard, street or alley within said municipality, and whenever such legislative body shall determine that in order to carry out such proposed improvement most advantageously that it is necessary to take private property adjacent to the proposed improvement, the fee to such private property may be purchased or taken by condemnation proceedings and the taking of such private property for the purpose of advantageously carrying out the proposed improvement contemplated is hereby declared to be a taking for a public purpose.

     If condemnation proceedings are resorted to for the purpose of securing any such fee to such private property such condemnation proceedings may be brought in accordance with the provisions of the charter of such municipality or in accordance with any other appropriate provisions therefor as exist or shall be made by law.

     After the completion of said improvements such municipality may lease or sell such parts of said property as are not to be actually used for such boulevard, street or alley, with or without such restrictions as may be appropriate to the improvements made.