No person or corporation shall deposit or permit to be deposited onto or into any public street, sidewalk, boulevard, alley or other public ground of the city any snow, ice, dirt, paper, litter, grass clippings, leaves, vegetation or other foreign material, except that sand, salt or ashes may be used for the sole purpose of preventing slipperiness.
(`89 Code, § 150.060) (Am. Ord. 695, passed 7-20-2010)