A fire hose may be the best solution. Years ago I had a basement drain tile, over 300 ft long, get choked. Had to rent a very high pressure 4 cylinder powered pressure washer machine with a long hose to open it. I think it could generate like 10000 psi. It wasn't cheap. It did the job.
Neighbor has a 10 inch x 30 ft steel tile at the end of his drive. Packed full. Digging it up is the only solution.