It's now July, and Boston's record snows still have not melted.

NYTimes: Remnant of Boston’s Brutal Winter Threatens to Outlast Summer

The article also includes the simple answer (mostly voiced by people unfamiliar with urban snow) to "Why not just push it into the ocean?"

If city officials had... just shoved the snow into Boston Harbor, the now-showcase waterway would be clogged with more than 250 tons of bicycles, hubcaps and other detritus. And surely, Boston would not have earned the distinction it won in May of having cleaner beaches than South Beach in Florida or Waikiki Beach in Hawaii. “This is stuff that is not floating in the harbor...”.