I asked about it and was told it was a mistake and would not recur.
That was then, this is now.
While I was leading a field trip last weekend, I discovered not only had the trail been recleared, but additional trails had been cleared to connect to various points along the four fire lanes.
I have not had a chance to learn the purpose, though it seems this is part of some kind of new management strategy.
I guess I was most amazed that someone the equipment missed an interesting pile of concrete debris that lies in the general area where some of the paths cross in the northeast section of the south tract.
I found a few pieces of litter that I had not encountered before. I'll return to collect them and probably mine the windrows that were piled up from the last fire lane work.
If nothing else, this makes monitoring the site somewhat easier.