What to do with ice is explained under the definition of Loose Impediments. "Snow and natural ice, other than frost, are either casual water or loose impediments, at the option of the player." So, in a bunker you would treat natural ice as casual water. Edit: Also remember you are not allowed to touch or move loose impediments in a hazard, (when your ball is in the same hazard,) so it would be a penalty to consider ice or snow a loose impediments and remove.
12/14/14 at 10:07pm