Future Subway Layout. Future 1828 and future 1881 layouts Early painting of "Harte's Mill Crossing," circa 1881 So I got me a hollow core door and sawed it in half, with the challenge being to see what I could do in a 32" x 40" space. One one square I am going to do an old west layout, trying to capture the feel of what it might have resembled when the Southern Pacific arrived in El Paso in 1881. As luck would have it, I went looking for this lumber salvage company, which took me right to the edge of a place called "Harte's Mill Crossing" on the banks of the Rio Grande River. This is just about smack where the old SP would have worked its way Eastward into El Paso, and also happens to be just about where the Spanish arrived in or about 1598. This little forgotten spot has an other worldly feel about it. I am going back with a shovel and bucket too dig up some earth to use for the scenic base. Arroyos, muddy river water, and twisted salt cedars (which I am told the railroad planted to suck up ground water destablizing the roadbed). On the second square I am going to see if I can wrest some flex track to create a layout for the John Bull to wend its way through some Eastern country side. The small space for the track will require a focus on the scenic bed to make the small track interesting.