Dutchess Jct was turned into CP 58 when NYC did away Signal station 50 in the '60's.
Over time NYC pulled up 2 mainlines turning a 4 track ROW into a 2 TRACK ROW.
This was a minor interchange between the NH and NYC.
Now under PC,the Beacon secondary became more useful after Poughkeepsie Bridge Burned.
I could never tell if there was a yard there,just the controlled siding,and the Beacon Secondary
heading east toward Hopewell Jct and the CTC controlled Maybrook Line after crossing the Hudson Mainlines on a bridge.
With the nearest shop at Harmon, a shuttle set would need to reverse(change ends) to get serviced if a Beacon-Hopewell shuttle was run.
With the Hopewell -Brewster North Shuttle,There's a running repair shop at Put Jct for servicing the shuttle set.
At one time there was wire to Danbury,from S Norwalk,that was removed ages ago by the NH,but left the cat poles behind to rust in place.
that why the local pols think it's easy to put back the wire.
Poughkeepsie was always a commuter layover yard,nothing else,except for a local freight based a small yard near the division post.