Seventy-five pounds per square inch of hydraulic head did not sound like running water. It sounded like a locomotive boiler preparing to rupture from the inside out.
Marcus “Mac” Cole felt the iron grating beneath his boots flex and bow. Every rivet in the central pier of Sluice Gate #04 groaned under the strain, screaming in sympathetic resonance with the four-hundred-and-eighty-volt electric drive motor of Worthington Pump #4. The motor casing, a six-ton block of cast iron bolted to the bedrock sixty feet below, was jolting at thirty hertz, sending pulses of blinding vibration straight up the catwalk stanchions.
In twenty-eight years as an MTA third-rail foreman on the Red Line, Mac had seen water mains burst under the harbor and high-pressure steam conduits blow manhole covers through second-story windows. When water was under seventy-five pounds of live pressure, it ceased to be a liquid. It became a hydraulic cutting tool capable of shearing four-inch timber like celery.
Boiling, chalk-white clause-pulp foamed up through the diamond-plate mesh. It wasn’t water. It was a dense, scalding suspension of hydrated quicklime, dissolved human facial dermis, and chemical sizing agents.
The slurry bubbled past Mac’s heavy work boots, sizzling as the caustic lye ate into the neoprene soles and filled the air with blinding clouds of alkaline steam. The smell of scorched rubber and boiling sheep tallow bit deep into the back of his throat, reminding him of the rendering plants that used to line the lower canal before the city council signed…
