The official route to stop the release required an order from the water authority or the court. Neither had arrived. The district commissioner was at Mrema’s rally, and the regional engineer’s phone had been switched off.
The system had been designed so that every lawful door could be closed by delay.
Lusekelo drove them through the police barrier. At the control building, Kaskazi’s engineers claimed the early test was an automatic calibration. Kondo demanded the maintenance register. The last entry had been signed before the rainfall warning and before the raw pressure spike.
Someone had converted a discretionary release into an apparently automatic event.
The main control software rejected Kondo’s credentials. Salum remembered a manual flushing valve in the old service network, installed before the digital retrofit. Its existence was omitted from Kaskazi’s current plan but recorded in a public maintenance booklet from the 1990s.
They descended through a wet stairwell toward the valve chamber. Kassim divided the operation into steps that could be stopped.
Kondo alone would touch the mechanism. Kassim would read pressure. Halima would record continuously. Mfaume, who had joined the evacuation team, would keep civilians away.
Any sudden change would halt the intervention.
“This will be called sabotage,” Upendo warned through the phone.
“Then we make every hand and every number visible,” Kassim said.
The manual valve had been chained. Lusekelo cut the lock, placing the pieces in an evidence bag. Kondo opened the bypass only enough to relieve the actuator. On Kassim’s screen, pressure dropped slightly. The lower gate paused at six percent.
For a moment, it worked.
Then black water surged from a drainage outlet below the dam. It carried fine sediment and glittering mineral dust from the illegal tunnel. The company had connected mine drainage to the release system. By using the valve, they had exposed contamination as well as the hidden workings.
Kassim stopped the next step until environmental officers could place temporary barriers downstream. A Kaskazi engineer shouted that every delay increased structural danger. Kassim demanded the raw pressure data that would prove it. The engineer refused.
Halima streamed the confrontation. Thousands of people watched the company demand urgent action while withholding the numbers needed to judge it.
Upendo’s court application still showed “pending payment.” She called the registry again. This time the clerk whispered that a senior officer had ordered the file removed from the hearing list. Upendo recorded the name.
At the school, teachers began preparing evacuation routes. Kassim compared the official route map with recent drone imagery and found that a small bridge shown as usable had collapsed six months earlier. He sent a corrected layer to teachers, motorcycle riders, and village leaders. The district plan was not merely biased; it was dangerously stale.
Kondo opened a purge line to reduce pressure without sending the full release toward the villages. The river darkened as sediment moved downstream. Kassim marked the contamination path and ordered sandbag barriers around the nearest well.
Mrema arrived with his own security team and accused them of causing the black discharge. Lusekelo asked why mine tailings were connected to a dam service line. Mrema replied that only a laboratory could identify the material.
“Three laboratories already have samples,” Halima said.
The director’s expression changed. Until then, he had believed every piece of proof could be seized locally.
Rain hammered the roof. The lower gate’s system restarted under a remote command. Kondo tried to override it, but the control signal came from an external server.
Kassim traced the address to Kaskazi’s city office. Someone there was forcing the release despite the manual intervention.
A warning siren began across the valley. The district message told residents to board company buses. Halima received a photograph from the first bus: the windows were covered, and the driver had been ordered to take people not to the high ground but to a temporary camp beside a Kaskazi warehouse.
The flood test had become a forced relocation operation.
Kassim looked at the clock. If the remote gate reached twenty percent, water would enter the first houses in seven minutes.