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I could not see the attachment. I assume your anchor bolts are also inadequate; although this option would work even if they are OK. Assuming the anchor bolts are typical and in the corners of the base plate, you could add angles to the flanges and web (4 total), either welded or bolted, and then post install new anchors to the foundation; adhesive or undercut anchors. You would still have to grind some weld to get a tight fit for the angles against the column. Welding would probably be more feasible than bolting to the column also. I haven't run the numbers to see what sizing would be needed, but I don't think it would be astronomical. With the new connection, you basically have just turned the baseplate into a large shim plate. Depending on the size of the plate and the angles, you may also need to add additional shim outside the baseplate if the angle overhangs, and weld in place.Might not be the prettiest fix, but just a thought - and not have to lift anything!