... the trestle. That's the road to get the big stuff down there to do it. I assume that's what you're talking about. Wow is right!
That hasn't started yet, although they are in the engineering phase of it; but they are doing major work across the Crum. More pipeline stuff, I think, unless the "road" they've built is to get access to the trestle. Stay tuned.
Looks like you're both right!!
The sewer line project has been going on a while:
http://www.swarthmore.edu/crum-woods-stewardship-c...
While the trestle/viaduct stuff has just begun:
http://swarthmorephoenix.com/2014/11/06/septa-to-r...
Say goodbye to Crumhenge for a while :(