If Hydro need’s to pull a new line UG, it is about $570.00 for a 200A, and about 70 to 100 cheaper for a 100A, but that sure looks like a 200A MAX base to me in the picture.
If the UG PVC is 3 Inches dia. as it should be, then you have the cat in the bag as it were if you need to go to 200A.
At least the code has made provision in RESIDENTIAL ONLY, for us to use a 2/0CU for 200A service instead of 3/0 now, and a #3 for the grounding conductor as it always has been, ( 200MCM AL instead of 250MCM AL IN PLACE OF THE CU)), but must have protection as it leaves the outside wall into the soil to the GROUND PLATE, 10’ Rod’s or the new ELECTRODE METHOD, so we use a piece of the plumber’s pvc water line and slide it over first.
Robert William Wagner