Well, the deed is done. Only one guy came and it took him longer to lift that lid than it did to clean it out. He used two metal poles as well as one we had to lift the edge then put a 4×4 under one corner to hold it up (luckily, we had a few laying around left over from the ramp building escapades!). He said it wasn’t as bad as he thought it would be (when I told him how long it had been, he winced and nodded) but then said the drain field was shot. We figured that much. He didn’t offer to fix it for us so I will believe what he said.
Because he just lifted one edge of the lid up, I didn’t get to see anything. Which is good.