FWIW Some Port TEU factoids:
* Port of NY & NJ for 2020: handled ~7.6M TEUs (loaded & empty/import & export) with 705,895 "rail lifts" for 2 class 1 RRs, NS and CSX.
* Port Saint John handled 79,179 TEUs in 2020 and, with a 7 yr expansion plan underway, that will expand to 330,000 TEUs capacity
* Port of Portland, ME handled 0 export TEUs and 22,325 TEUs in 2018 and Eimskip said that TEUs should have hit 30,000 or so in 2019.
So, based on PofNY/NJ data, if rail lifts = ~10% of TEUs then Port of Saint John could grow by 2028 to 33,000 annual rail lifts or 90 rail lifts (ie, containers) per day or 45 double stack well cars/day (or a single 2 mile long stack train every 3 days). That's not a lot of traffic for 1 RR let alone 2 if CSX somehow finagles its way into the mix.
Here's a link to a spreadsheet detailing US port traffic for the period 2000-2017 showing the difference in TEU traffic for CSX-served ports NY/Norfolk/Savannah/Charleston/Jax/Boston v. Portland ME (note that Boston, currently servable by CSX via dray from Worcester, blows the doors off Portland ME in TEU volume):
https://www.maritime.dot.gov/data-repor ... 80%93-2017