Sure enough, the 4x4 post holding up one side of
the main electric pedestal was encased in concrete at its nether end. The Kubota’s backhoe and a few swings with a hefty
sledge hammer soon made that problem go away.
Post reinstalled, with square drive screws set flush with the board
surface, thank you very much, in position so that I can cut the pedestal down
to a much smaller size once the “temporary” (since 2009) electrical subpanel is
removed.