You got it.Oh ! Roger that !! Ok !
Then here is an excuse for a grade !: Have narrow gauge start climbing at midway down far left, before curve, crossing over Apple river, climbing into the hills to ore/coal mine/rock quarry/logging camp/whatever, with small Bldgs/town/diner/gas station in/around wye..
Main line stays at water level route below it, going under narrow gauge via tunnel& portals...
Hope I got that right this time...
Also considering the main line going down grade to the port, giving a little more elevation change between the two lines.
Still finalizing the plan for the first section.
@CTValleyRR - I am also revisiting the DC/DCC question. Thanks for the nudge. But I am concerned about modifying the stack of Shinohara turnouts I have.