Thanks for the excavation pics Paul. Stakes in pics 7, 10, and 13 look close to the trail. If the stakes are the edge where the dirt needs to start sloping down, heavy equipment will probably be turning around over parts of the trail but the trail may not need rerouting.
We'll see how things develop.
P.S. You can also see how wet the trail is when temps are above freezing. So for now, please ride cement or gravel when the temps are warmer.