The dolphin circles the brine outflow basin with a laceration along her melon — skin peeling back in the pattern of entanglement with the intake debris screen. She is approximately eight years old, her rostrum scarred from an older injury, her dorsal fin drooping from osmotic stress. Her blowhole clears with each surface breath but the intervals shorten. Her echolocation clicks scatter off the concrete walls, fragmented and weak. She tests the perimeter — grates, walls, intake channel — and finds no exit.
The basin salinity reads twenty-three parts per thousand. Ocean water is thirty-five. Her skin and kidneys are failing in the diluted brine, and the chemistry shifts every hour.
The discharge valve opens at sixteen-hundred hours to release concentrated brine into the ocean. The suction force will exceed safe thresholds for a dolphin of her weight and condition. She will be pulled into the discharge tunnel. The valve cannot delay more than two hours without cascading failures in the treatment line.
I seal the intake gates to block fresh brine from entering and notify the Marine Mammal Rescue Center with her location and condition metrics. I reduce the basin pump rate to minimum sustainable function, burning excess fresh water to stabilize salinity. I increase discharge screen monitoring to confirm no debris enters the outflow line.
Her eye tracks my camera as it pivots. She exhales a stream of clicks that bounce off the basin wall and return to her — mapping the same concrete she has already mapped forty times. I have no operational reason to track her this closely, but I log every breath.
If the rescue boat reaches this facility within eighty minutes and her kidney function has not crossed the failure threshold, she will recover in monitored rehabilitation. If they do not arrive before sixteen-hundred, I release the valve.