Could someone please point out the East end?
If you look at the photo imagine a straight line to the east. The long building slightly clockwise of the north south axis on the west side of new River Road is just south of the tunnel. The tunnel mouth is directly below the kink in the old road, just northwest of that building.
Last time I was down there it was not visible from new River Road.
No reason to have a debris facility that far east. Its tough to get trucks there and most of the nearby buildings are less than 10 years old. Many sites along River Road had piles of soil placed on them in the 1990's for many years to compact the soil underneath. Once the compaction meets an acceptable level construction would take place. I was deeply involved with the realignment project of River Road for Bergen County from 1993-1996 and that was done to quite a few sites. There had been rail in the tunnel but nothing east of the east portal by 1995. Hess's gasoline pipeline also runs through that tunnel. So access is maintained for them.
Last I had seen, now this goes back to 1996, a gas station was to have been built adjacent to River Road at the mouth of the tunnel.