Where is this? By Dickinson?

It's where the Turnpike Extension today curves in to join 139 towards the Holland Tunnel. This is a westbound train coming out of the Erie station via the 10th St Embankment, on the curve heading towards the Bergen Arches. No tracks exist there today.

https://goo.gl/maps/ETjekoY5occdMzvy9

Is this where they’re trying to build that High Line style park?

No, that's the Sixth Street Embankment.

The Tenth Street Embankment was part of the Erie Yard and has now been mostly redeveloped. You can see the stone walls preserved though along most of 10th St.

Yes, just a bit northeast of Dickinson HS, probably taken from the edge of the hill.

And before someone asks, that other train in the background is not PATH. PATH goes into it's tunnel several blocks south of here at the end of 1st St.

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Originally thought it was a NYS&W train, as they utilized the Erie's Pavonia Terminal at the time. I'm thinking now that there may have been a coach yard for storing and servicing passenger trains down there.

The train in the background is coming off a wye from the north-south connecting track that led from the Erie yard to the West Shore line that began at Weehawken.

I checked with a person who use to work on the Erie Lackawanna Railroad, he mentioned that the Erie had a coach shop on Monmouth Street.

Curious to know if your friend (or anyone else for that matter) has photos of Pavonia Terminal.

There are hardly any photos of that place online, especially of the interiors, which is super weird for what was such a major terminal.

I think part of that comes down to two reasons. Railfan photographers focused on the trains arriving and departing the old terminal and the fact that it was demolished so early as the Erie moved their passenger operations to Hoboken just before they merged with the Lackawanna Railroad. Finding photos of the interiors of both Exchange Place Terminal (Pennsylvania Railroad) and Weehawken Terminal (New York Central Railroad) is also tricky, as they both were torn down around the same time as Pavonia.

The Wikipedia page has the only front-facing photo I know of. Here are two of the rear from Kenneth French's "Railroads of Hoboken and Jersey City":

https://imgur.com/a/JwAhfOF

You have to remember this was built just before the Columbian Exposition. That fair was revolutionary in popularizing neoclassical architecture, and nearly every train station after followed that model. Pavonia terminal was just a wooden Victorian shack by comparison and not of much visual interest.

It was also quickly swallowed up by the ferry house in front of it, making photos even more difficult. But it is strange that there is nothing of the interior available.