Originally Posted by
phughes
Their guidelines are to preserve the trail surface as it was during the canal operation. What that means by their rules, is that the soil used on the trail has to match the composition of the trail's soil at that time it was in operation. I spoke to a park service worker who was doing some maintenance one day as I was riding the trail.
I think there're a few exceptions to that general rule. For instance, when they rebuilt the viaduct on the C&O a few years ago, the approaches somehow were rebuilt with gravel.