The Mayor and Council, by a three-fourths vote, shall have the power to open, control, name, rename, extend, widen, narrow, vacate, grade, curb, gutter, park and pave or otherwise to improve and control and keep in good repair and condition, in any manner they may deem proper, any street, avenue or alley, public parks or square, or part of either, within or without the limits of the city; and it may grade partially or to the established grade or park or otherwise improve any width or part of any street, avenue or alley.
(2005 Code, § 8-102)