Postby mbalcs33 » Thu Jan 15, 2015 3:13 pm
A few years back I had a similar issue and used a large diameter drill into the ground followed by the rebar by sledgehammer. Pour a little water in during freeze and it seemed to hold up. The deeper the water the more of these extra supports you'll need. If it is real deep (more than 18 - 24") you may want to think about a 2x4 support attached at an angle 24" above ground. You can secure this by similar method of drilling thru board and into ground, followed by rebar introduced with sledge.
Good luck!
Mike
Skating on ponds for 45 years, a backyard rink for 14
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"The important thing is that we watch each other's backs out on the ice. That's what matters"
Zdeno Chara