Small world indeed, John! You know the exact area !
Here's three pics from one of the many walks down the Merrimac branch:
1) Looking south toward downtown Merrimac and Rt 110 (Where Railroad Ave deadends)
This is where the single track opened up into a freight yard, where the turntable was straight ahead:
2) One of the old freight buildings at the end of Railroad Ave:
3) Looking north with the Church Street cemetery in the distance on the left and a pond on the right (not visible, but home of some impressive snapping turtles) A couple miles or so north through the thick woods, there is still much coal laying along the path.
The feeling of spirits (or "history" for people saner than myself) along this branch was equally noticeable as what I experience here, along the GW, defunct UP, and Colorado @ Southern lines.
Thanks for the historical info of that area. I wish I knew these details when I was still living there!
When I first got Trainz 2006, the first project in mind was the Mill Yard area in Amesbury as the hub, and connecting Amesbury with Merrimac along the same trolly route you mentioned. The River Rd area between the Chain Bridge and Merrimacport, as you know, is one of the most beautiful drives anywhere. A delightful lady named Norma Jean Fowler from the Alliance of Amesbury was giving me some historical leads, and the Merrimac Historical society had meetings at the old library.
If I remember right, the library also had a picture hanging of a freight engine, looked like an old GP, (not sure), heading southbound on the Merrimac branch going over Heriman Rd, dated 1976. This was surprising knowing how heavily wooded that area is.
One of meetings featured presentations from long-time residents showing a collection of very old photos in a slide show, some showing the trolley and rail systems you mentioned, including the trolley line that went over the Chain Bridge from Amesbury to W. Newbury. If you get a chance, attending one of their meetings might be pretty interesting to you. I bought two historical map sketches of the Merrimac, Amesbury region showing tracks and railroad structures.
I now realize that taking on that area with Trainz and doing it any justice would have been .........challenging to say the least.
You also brought up the hat factory. I loved that building, especially before it was remodeled and turned into condos. I used to think that the hat factory reminded me of the deteriorating sugar beet factories here in Colorado.
If I remember right, the powerlines that you mentioned are close to where Corona's restaurant is, or closer to Amesbury on 110 where the buffet Chinese restaurant is..?..with the cement factory/ rock quarry on the opposite side of the street, another area that looks like it may have had rail access.
You grew up on Emery Street! Small world indeed!! My son spent many overnighters and cub scout meetings at the Baga residence on Emery St!
Thanks for compliments on the route. Speaking of crickets, someone uploaded a sound file that has crickets that come on automatically when the sun goes down, so during the night scenarios, you can definitely hear crickets in tall grass

Thanks again John for sparking these great memories and encouragement!