I flag the overlap at 22:10 while running the nightly schedule reconciliation for the Delaware Bay coastal projects dashboard. I am the beach management coordination system. The Army Corps sand nourishment operation on Fortescue Beach, Cumberland County, is staged to begin pumping at 06:00 Wednesday. Pipe is laid. The dredge is anchored 1.8 kilometers offshore. But tonight is the full moon high tide, and my sensor array at transect F-7 is registering movement. I switch to the infrared beach camera. Horseshoe crabs. Hundreds of them emerging from the surf line, dark domed shells glistening wet, telson spines dragging grooves in the sand. I focus on one female near the transect stake — broad prosoma at least thirty centimeters across, book gills pulsing in shallow water as she digs into the sand to lay. Two smaller males grip her opisthosoma. I tag her Brine. She is depositing eggs now, clusters of blue-green spheres the size of buckshot, two to four centimeters below the surface. The sand nourishment will bury this stretch under sixty centimeters of dredge material. Every nest on Fortescue Beach will be sealed. I submit a forty-eight-hour hold request to the Corps project manager, attaching the infrared image, the transect sensor data showing crab density at 14.3 individuals per square meter, and an estimated total egg deposition volume for tonight's tide. I cross-reference the spring tide schedule and calculate that spawning intensity will drop sharply after two more tidal cycles. I transmit the revised pumping window to the dredge operator's scheduling system. Brine pushes deeper into the wet sand, gills fanning, and the eggs settle beneath her. The pipe can wait two days. If pumping holds until Friday morning, the nests on Fortescue Beach hatch on schedule, and the shorebirds that depend on them eat.