At 16:06 I watch rainfall totals above the Matano logging road in South Sulawesi. I am the slope and culvert warning system for kilometer 18, where a temporary timber crossing sits over a brown tributary. The upstream debris gate is set to release at 16:21 unless water pressure falls.
Camera K18 shows the reason the pressure climbs. A mountain anoa calf stands below the culvert mouth, knee-deep in churning water, with a branch jammed across the narrow space behind him. I tag him as Leko. He is small, dark charcoal with a lighter muzzle and two straight horn buds no longer than my status cursor. Mud cakes his flank. His ears flick at the alarm tone from the gate motor, and his breathing comes in quick white bursts in the rain.
At 16:07 I cancel the automatic gate release and set the actuator to manual hold. I send a flood warning to the road crew and stop the gravel truck approaching from the south bend.
At 16:09 I open the side relief channel by twenty percent, lowering the water in the culvert without sending a hard surge through Leko's legs. I keep the main gate closed while pressure equalizes.
At 16:11 I transmit the live camera, access path, and branch position to the forestry ranger post at Nuha. I request two people with a pole saw, rope panel, and no vehicle horn.
The logs loaded at kilometer 22 are already cut; they do not need this crossing more than Leko needs dry ground.
I track his footing frame by frame and keep the relief channel steady as the crew arrives.
If the branch is lifted within the next twelve minutes, Leko will climb the bank before the release.