Time to dig out enough of the earth to get our cover off for a little exercise in being very careful. Hopefully we don't have to get out the rotary-hammer for that patio!
You have to be quite careful not to make any slips. 100A to 200A we have to enlarge our hole a bit, and it would be nice if the penetration is in the same location to suit our new purpose. Now, we got our tin-snips, hammer and big screw stick, and the sawzall with the nice long blade. First we have metal to open, then brick/wood to stop the effort. Mind you being careful as a skilled electrician always is, nothing to stop the ground fault but a transformer.
Definitely not a fun task, I always dread when I find out the upgrade is an UG.
And being bit here and there doing these is always a high percentage. Been in the middle of it when the NorEastern blew in, bad gutters letting the overflow cascade on you kneeling in the mud puddle you helped to create, slicker-gets in the way, rubber gloves-can't get a grip on anything, gonna get hit-probably, just make sure you ain't gonna get sucked in for the long JOLT!!!