I do have a map of Rimer and I have walked everything that is accessible without going on NL&S property. I didn't have room to model the crusher tracks in their entirety so what I did was have one track that holds 2 cars (enough for my scaled down needs) plus a little room. The plan is build the loader as a flat against the backdrop with the end of a hopper attached to the backdrop under the loader. The coupler on the car end will be glued open so cars set into the siding won't actually be attached. This will give the look of more cars on a much longer track. The "pit" will be photos of the pit at Carey to give the illusion of a big hole in the ground.
I have a friend who grew up in Columbus Grove who's mother worked at the Rimer quarry. She remembers the railroad and doing billing for outbound cars but doesn't remember what the loader looked like. My guess is it looked like the ones at Carey, maybe a little smaller.