The Pipeline route is a work in progress. Check PennEast’s sight regularly for the most recent planned route – they have already changed it significantly once in January 2015, and may do so again. You can see their published route here: http://penneastpipeline.com/proposed-route/ Note that this page is a bit wonky and the route shown seems to change back and forth between the November and January versions.
I’ve saved a copy of the January 2015 route in the form of the Google Earth KMZ file they’re using. While the proposed-route link on the PennEast web site is useful, they’ve limited how much you can do with the map. With the raw KMZ file you can load the route into Google Earth (it’s free, go get it!) or within Google maps and see exactly where the route lies in relation to you and sites you’re interested in, measure distances, etc. I’ve uploaded the KMZ file here:
Note that the purple lines are showing a 400′ wide “survey corridor”, the actual pipeline easement could be anywhere within that 400′. During construction that corridor will shrink to around 100′, and the final easement will be 50′ wide.