My dream idea is to model a line so as to recreate the problems surveyors that surveyors had to solve, of grading, and such. Whereas, I would take a plot of ground without the grass, make surveying plats with a level and tape, and then plan for the best route out of a couple of "proposed" routes, then grade it, and build it.

My ideal situation would be to have this ground near a creek or small stream, so that with marine-type surveying, I could design a working electrified railroad bridge. The best part would be designing and building the bridge piece by piece, out of plastrux and modeling stripwood. I also would want to plot pier positions and draw plans for piers, the super and substructure, and earthwork for the approach grades BEFORE construction so as to avoid the easy, build the bridge, set it in the hole and then backfill.

The most interesting plan is to, like I said, plot the pier positions in the stream, and then build cofferdams, then siphon the water out of them, excavate them out, then build forms out of modeling stripwood and fill them with ready-mix hydraulic cement so as to have real, concrete, below ground piers for the bridge to sit on,