Although not an ice rink, the machinery used to create ice for Aztec Brewery
in San Diego froze the ground to a depth of more than 15-feet. After
demolition of the brewery and ice machine, it took a D-9 cat to cut a hole deep
enough to remove the frozen icy dirt beneath. I always felt badly they City of
San Diego did not require archaeological monitoring during that operation.
Ron May
Legacy 106, Inc.