Per City Ordinance:
Sec. 18-121 - Deposit of grass clippings, leaves, etc.
No person shall place or cause to be placed in or on any public sidewalk, or on any pavement, gutter, drain, ditch, alley or roadway in the city, any grass clippings, leaves, lawn rakings, tree or bush trimmings, tree trunks, stumps, ashes, soil dirt or household debris, unless specifically approved by the city clerk.