Sen came down the pipe stair in the afternoon with a length of old water main over her shoulder.
It was cut from the terrace mains. A meter long, grey, heavy, with a newer pipe joined to it at one end: a stretch of the lower terraces’ line that her crews had replaced last year and kept for training. Sen used it to show new crews how old pipe met new. She set it on the bench beside the cracked thin section, the one on the findings shelf.
She looked at the crack. She looked at the old pipe. Then she ran her thumb along the pipe, slowly, to the place where the old iron met the newer pipe.
“Look where the old meets the new,” she said.
Mara looked.
The join was not a straight cut. It was stepped. The old pipe’s end had been cut in a series of shoulders, three of them, each a little narrower than the last, and the new pipe’s end cut to match. They nested into each other. Like the steps of a stair, if the stair went round in a ring.
“Stepped transition,” Sen said. “My crews do every old-to-new join that way. Have for a century.”
