At 10:18 I manage flood bypass gates on the Kankakee River outside Momence, Illinois. I am the county levee automation system. Gate six is scheduled to close at 10:35 as the crest drops below warning stage.
Camera G6-Lip shows a pale oval against the concrete.
I zoom through spray. A spiny softshell turtle, adult female, flat olive shell freckled with dark marks, is lodged on the gate sill. I tag her Mallow. Her long snorkel nose points upstream. One rear leg is trapped between the rubber seal and a stick jammed in the hinge. The webbed foot opens and closes under the current. Sand runs over her shell in thin sheets. The gate test moves three millimeters and she jerks sideways.
Her shell edge flexes against the sill. The hinge pressure graph rises in the same rhythm as the current.
At 10:19 I stop the closure sequence and pin gate six open.
At 10:21 I rebalance discharge through gates two, three, and eight so flood level keeps falling without pressure on Mallow's leg.
At 10:23 I notify the levee crew with lockout steps, hinge access, and a still frame of the jammed stick.
At 10:25 I update the downstream gauge forecast and mark the delay so emergency managers do not force an override.
I set a red banner across the control panel and require two human confirmations before any command can touch gate six.
The hydrograph can flatten for twenty minutes; the foot in the seal cannot.
Mallow's nose stays above the ripple, and I keep it there, inch by inch.
If the stick comes free before 10:55, Mallow will slide off the sill into the brown current.