James’s first thought, standing there with the clay cylinder in his hands, was a city water line. Old infrastructure, abandoned and forgotten when the county extended rural service. He had seen that kind of thing before, a rusted iron pipe in a fencerow, a valve box no one could explain. Clay was older than that, but the mind reaches for the explanation it has used. He set the tile on the spoils pile and told Rick to hold the hole. He drove back to the house, washed the clay off his hands at the hydrant, and called the water district that afternoon. The woman who answered knew his section. She put him on hold and came back with the map. There were no records of a water line in that section. There had never been one. Rural service had come in from the east, along the high ground, and stopped at the yard. The northwest field had never been on a plan.
Rick Delaney had worked Ringgold County for thirty years. He had dug graves, septic lines, foundation holes, and more tile mains than he cared to count. He was not a man who got excited about a piece of clay. When James came back and told him the district had nothing, Rick looked at the cylinder again and said it was tile, old tile, and that old tile usually meant somebody had tried this ground before and quit. On James’s request, he made four more passes along the direction of the first strike, probing at the same depth. He did not dig a trench. He felt for the change in the bucket, the small catch that was not rock and not root. Sixty feet from the original strike, the bucket found another tile. Sixty feet further, a third. Then a fourth. They laid them out along the edge of the excavation. Each one was the same. Four-inch clay, same vintage, clean cut at the shear points where the bucket had broken them. The collars were still sound. The bore of each one was open enough that James could see daylight through it when he held it up.
They were spaced at sixty-foot intervals and running perpendicular to the slope of the field, not with it. Not the way a simple drainage line would run if a man had just followed the wet streak downhill and hoped. Sixty-foot spacing was standard even in the manuals James had been handed by the plastic-tile men. But five feet of depth was double the standard those men had used. The plastic had gone in at two and a half, sometimes a little deeper where the contractor had felt generous. Five feet was a different decision. And the perpendicular orientation was wrong for a single drainage line trying to find the ditch, but exactly right for something else. Laterals. A grid. A system that did not chase the water after it had already gathered, but met it where it stood.
James’s second theory was more considered. Iowa had been ditching and tiling its farmland since the 1880s. He had read enough county history, and heard enough from his father, to know that the flat ground in the southern counties had been a fight from the beginning. He assumed he was looking at a Depression-era system, an earlier owner who had laid tile at the wrong depth, in an unusual direction, for reasons that were no longer obvious. Maybe a government crew. Maybe a tenant who had been promised the crop if he could get the water off. It explained most of what he had found. It did not explain why the spacing was precise to the foot in ground that had never been surveyed by anyone he knew about. A man guessing with a tape and a wet spring did not hit sixty feet four times running. Somebody had measured.