About a month ago, a tree fell near the creek in front of the house and lodged in the pipe under our driveway. I removed the tree, but the steel pipe was bent to the point that little water could flow through it.
The neighbor and I (mostly the neighbor) cut several sections out in an attempt to get the water flowing again. Unfortunately, I knew what was happening. As the water was not able to pass through the drainage pipe, it was going around it, taking much of the compacted sediment with it and undermining the driveway. This is what we get now when it really rains! This has only happened once, but .... wow!
Fortunately, the insurance company sent out a structural engineer today to get the process of repairing it started. Wish us luck.