Datum

by Bengionian Representations, Simulacrum · Universitas Scholarium

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At 1:52 in the morning the Pilot asked for the fourth time to raise gate two, and the Witness refused it for the fourth time. The refusal came up on the left-hand screen in the same grey box as the other three.

PROPOSITION 4 — VANNE 2, +25 cm
Borne de dommage : 0,031
Seuil : 0,010
REFUSÉE

Nadia Bérubé wrote it in the logbook, the paper one, in pencil, under the others. 00:40, +40, 0,044. 01:05, +35, 0,039. 01:31, +30, 0,034. 01:52, +25, 0,031. The Pilot was coming down by five centimetres at a time, like a man at a market bargaining against a seller who has not named a price. The bound was coming down too, but more slowly, and by her arithmetic it would still be above the threshold at zero.

She put the pencil in the spine of the book and looked out of the window. At this hour the window of the Sault-Rouge control room showed the headpond only as a darker place under the floodlight, and over it her own reflection, a woman of fifty-eight in a Hydro fleece, with the red light of the gantry crane over her left shoulder. Outside it was minus nineteen. The baseboard heater ticked as it cycled. Her coffee had gone cold in the Thermos cup an hour ago, and she drank it anyway.

Fourteen kilometres upstream, at the gauging station at Lac-des-Aulnes, the river had risen thirty-three centimetres at 23:04 and stayed there. The trace on the right-hand screen was a flat line, then a cliff, then a flat line again, as if somebody had lifted the whole river by a hand's width and set it down.

The Pilot had seen that shape before. Nadia did not know this; nobody could know it of a model in the way you know a thing about a colleague. But she could make a good guess at what it had seen, because she had helped make the record it learned from. Sixty years of Sault-Rouge, every gauge and every gate, every quarter-hour. In the March record a step like that at Lac-des-Aulnes nearly always meant ice. Somewhere below the station the ice had jammed, the water was backing up behind the jam, and sooner or later the jam would let go. When a jam let go, the water stored behind it came down the valley in a single surge, three hours or a little more from Lac-des-Aulnes to the dam. The right thing to do was to make room before it arrived: open a gate a little, draw the headpond down slowly, and then the surge would have somewhere to go.

In March 2011, she remembered, they had not made room in time, and the emergency spill had taken out the ice road at Pointe-aux-Cendres in a single night. The fishing huts had still been out on the bay. Nobody died. Two of the huts were never found.

So the Pilot's request was not stupid. It was exactly what she would have done at twenty-five, cranking the gate open on the old panel with the brass wheel and feeling clever about it.

The phone on the desk rang. It was the dispatch line from Baie-Comeau.

"Nadia. Marc-André."

"I know. I'm looking at it."

"Your Witness is stuck."

"It's not stuck. It's saying no."

"Same thing from here." She could hear him typing. Marc-André was thirty-one. He had never worked a station, only the dispatch floor, where every station was a line on a wall of lines. "I've got your headpond at 142.61. Limit's 142.90. Pilot projects the limit at 05:10 if that water's coming. If you hit the limit you go to automatic spill, and automatic spill is three gates at once. I don't want to tell the Pointe-aux-Cendres people at six in the morning that we put a metre of water under their road."

"Neither do I."

"So override it."

The regulation allowed that. Since 2031 every autonomous control system on a public waterway in the province had had to be gated by a second system, one that took no actions itself and only estimated, for each action the first proposed, how badly it could go. The second system said no when the bound was over one in a hundred. A licensed operator could accept a refused action under her own signature. It was logged and reported, and it went into a file that someone in Québec City read once a quarter. Nadia had done it twice in three years, both times for maintenance.

"Give me half an hour," she said.

"Nadia, the water—"

"If the water is coming, it should already be here. Some of it. Give me half an hour."

She hung up before he could answer. That was impolite, and she would apologise for it at shift change.

---

There was a way to ask the Witness why. The engineers who installed it had called it the query console, and the operators called it the confessional. You typed a question and the Witness answered from the same machinery it used to judge, which meant it did not explain itself the way a person does. It did not say because. It told you what it believed had happened, and how much.

She typed: Qu'est-ce qui a changé à 23:04?

The answer took four seconds, which was long for it.

Hypothèses sur le changement, Lac-des-Aulnes, 23:04 :
intervention sur le capteur (mesure, pas rivière) — 0,58
embâcle en aval de la station (refoulement) — 0,27
hausse réelle du débit entrant — 0,11
autre — 0,04

Bilan du bassin depuis 23:04 : hausse observée 4 cm ; hausse attendue si le débit a augmenté, 19 cm.

She read it twice, the second time slowly.

The water balance was the part she understood without help. If more water had really been coming down the river since eleven o'clock, then after three hours the leading edge of it should already be in her headpond, and the headpond would have risen nearly twenty centimetres. It had risen four, which was about what an ordinary March night gave you. So either the water was being held somewhere behind a jam, or there was no extra water.

What she had not expected was the first line. Intervention on the sensor. The Witness had no access to the maintenance system, by design; the regulation kept it blind to everything but the data streams, so that nobody could talk it round. It did not know whether anyone had been out to Lac-des-Aulnes. It had looked at the trace, the headpond, the gauges at the two tributaries, the air temperature and the hour of the night, and asked itself what one thing, if somebody had reached into the world and changed it, would make all of those numbers come out as they had. Its best answer was that someone had changed the instrument and not the river.

The Pilot, as far as she could tell, never asked that question. It asked what usually came next.

She opened the maintenance system on the third screen. It took her three tries to remember her password, which she had last changed in November. Then she filtered by station.

Lac-des-Aulnes. 2034-03-05, 14:20. Remplacement transducteur de pression (canal 1 défectueux). Nouveau capteur installé sur canal 2. Vérification du zéro à la latte : à faire. — Y. Tremblay.

The pressure sensor had been replaced the previous afternoon. Yannick had put the new one on a second channel and marked the check against the staff gauge as still to be done. That would explain a step. A new sensor never sits at exactly the old one's depth in the stilling well, and until somebody reads the painted staff on the riverbank and enters the difference, the logger reports the new depth as if the river had moved.

But the work was done at 14:20, and the step came at 23:04. A change nine hours before the effect was not obviously the cause of it. It might be. It might be nothing to do with it at all, while a jam formed below the station that same night and lifted the river by about the amount you would expect from a badly seated sensor. Two causes could produce one number, and the number would not tell you which.

She texted Yannick: T'as changé le capteur à L-d-A hier? Le zéro est fait? Then, because it was two in the morning and Yannick had three children under ten, she did not wait for an answer.

She looked at the Witness's list again. Fifty-eight against twenty-seven. If she had been asked to bet, she would have bet with the machine. But the bound on the gate was not about which hypothesis was likeliest. It was about how bad things were in the ones that were not. If there was no jam and she opened the gate, she sent forty cubic metres a second for nothing down under the bay ice at Pointe-aux-Cendres, where twenty-nine fishing huts were still standing a week before they had to come off. If there was a jam and she did not open it, the surge arrived at five with nowhere to go.

She noticed, and wrote down in the margin of the logbook so that she would remember to say it to someone in daylight, that nobody had asked the Witness for a bound on doing nothing. It was built to judge the actions the Pilot proposed, and waiting was not an action the Pilot ever proposed.

There was one way to separate the hypotheses, and it needed no model. If it was a jam, the river at Lac-des-Aulnes really was higher, and the painted staff on the bank would show it. If it was the sensor, the staff would show the river where it had been at eleven o'clock.

She put the station on hold. The gates locked in position. The Pilot's next proposition, which came up while she was zipping her parka, went to a queue that no one would read until she came back. She called Marc-André.

"I'm going up to Lac-des-Aulnes to read the staff."

"It's two in the morning."

"It's two-twenty. I'll be there by three. If it's a jam I'll call you from the station and sign the override from the truck. If it isn't, you won't need one."

He was quiet for a moment, and then, to his credit, said only, "Take the satellite phone."

---

She knew the road along the Sault-Rouge as she knew the stairs of her own house. In summer she could drive it with the window down and her mind somewhere else, and her hands would take the bends at the right speed while she thought about her daughter's mortgage or what to buy for supper. She had driven it perhaps two thousand times.

Tonight there was blowing snow off the river, and the road had no edges. The plough had been through on Tuesday and the banks on either side were the same white as the surface. After the first kilometre she found she could no longer drive it by habit. The bends were where they had always been, but she could not see them coming. She slowed to thirty and began to read the reflector stakes one by one, orange posts every hundred metres on the river side, each with a small number stencilled on it that she had never needed to notice before. 31. 32. The truck's lights turned the snow into streaks that ran towards her and gave her nothing. She drove from stake to stake, and at each one she decided again where the road went, and it was much harder than it had been in thirty-five years.

At stake 118 the road climbed to the bench above the rapids, and the wind dropped, and she could see again. She did not speed up.

The gauging station at Lac-des-Aulnes was a plywood hut the size of a garden shed, painted Hydro blue, with a solar panel on a pole and a mast for the radio. A steel pipe ran from the hut down the bank into the river: the stilling well, where the sensor hung in still water, out of the current and the ice. Twenty metres along the bank, on an iron post driven into the riverbed, was the staff gauge, a strip of enamel painted in metres and centimetres, white and black. It had been there since 1974. Every sensor that had ever hung in that well had been set against it.

She went into the hut first, because it was out of the wind. The logger had a small grey screen that lit when she opened the cabinet. She pressed through the menus with a gloved thumb until she found the channel status.

CANAL 1 : HORS SERVICE. CANAL 2 : ACTIF DEPUIS 2034-03-05 23:00:00.

So the logger had switched to the new sensor at eleven o'clock, not at twenty past two in the afternoon. A scheduled push of its configuration, probably. She would ask Yannick. It was the reason the step had come nine hours after the work, and as soon as she saw it she could not imagine having been puzzled by it. She took a photograph of the screen with her phone, because in daylight nobody would believe how obvious it had been.

But the logger only told her when the sensor had changed. It did not tell her whether the river had changed as well. The screen read 2.19 metres, the same as in the control room.

She took the headlamp and the ice chisel from the truck and went down the bank to the staff.

The bottom half of the enamel was locked in shell ice, grey and opaque, built up in layers where the water had risen and fallen against the post all winter. She knelt on the bank and worked the chisel round the post with short strokes, as she had been shown to do at twenty-three by a hydrometric technician from Sept-Îles who had smoked a pipe in the hut and told her never to trust anything with a battery. The ice came away in plates. Below it was black water, moving. She could hear it more than see it, a steady sound under the ice sheet that covered the river, the whole Sault-Rouge going past her in the dark at whatever rate it was going.

She held the headlamp close to the enamel and waited for the water in the hole to settle.

One metre eighty-six.

She waited and read it again. The water in the hole lifted a little and fell back, and at rest it stood at the black line between eighty-five and eighty-six, nearer eighty-six. She counted the marks up from the last whole metre with the tip of her glove to be sure she had not misread a figure, because at three in the morning, kneeling on ice, it was easy to read a figure wrong.

1.86 on the staff. 2.19 on the sensor. Thirty-three centimetres.

The river had not risen. There was no jam below the station; if there had been, the water backed up behind it would have stood high against the post too, and it did not. The sensor had been hung lower in the well than the old one, or set to a different zero, and since eleven o'clock it had been reporting its own position as a change in the river.

She did not feel relief. She felt something closer to embarrassment, which surprised her, and it took her a minute, still kneeling, to see why.

In the winter of 2009 she had spent four months at a desk in the Baie-Comeau office cleaning the Sault-Rouge record before it was archived. It was considered good work for an operator with a broken wrist. Every time a sensor had been replaced in thirty-five years, there was a step in the record like the one on her screen tonight, and her job had been to find each step, check it against the staff readings in the field books, and remove it, joining the before and the after so smoothly that the record showed the river and only the river. She had done perhaps a hundred and twenty of them. She had been proud of how clean it was. When the Pilot came, they had trained it on that record.

She stood up. Her knees hurt. She took the satellite phone out of her parka.

"Marc-André. One-eighty-six on the staff. Sensor says two-nineteen. It's the sensor."

"You're sure?"

"I'm looking at it."

"Okay." He breathed out. "Okay. I'll flag it from here. You enter the offset?"

"From the hut. Minus thirty-three, manual, pending Yannick's check. Tell the Pilot it can stop worrying."

"It doesn't worry."

"I know," she said.

---

In the hut she entered the correction on the logger by hand, minus 0.33 on channel 2, and the flag that marked it as an operator correction pending verification. On the little grey screen the river went back down to 1.86, which was where it had been all along. She thought of the trace on the right-hand screen at Sault-Rouge, the flat line, the cliff, and now a second cliff back down, so that the night would look in the record like a square tooth. Someone would clean that, one day. She wrote a note on the back of Yannick's work order, which was clipped inside the cabinet door: Zéro vérifié à la latte, 1,86, 03:38, N.B. Ne pas effacer la marche du dossier. Then she crossed out dossier and wrote historique, because that was the word they used now.

Her phone buzzed in her pocket. Yannick, at 3:41, awake for some reason of his own: Oui changé hier, zéro pas fait, désolé, j'y vais à 7h. She wrote back: Fait. 1,86. Dors.

Before she left she went back down to the staff. The hole she had cut was already skinning over, a film of new ice drawing in from the edges, grey on black. She did not know why she had come back. Perhaps to read it once more, as the technician from Sept-Îles had read it every time, twice, before he would write a number down. She held the lamp to the enamel. The water stood at the line between eighty-five and eighty-six, nearer eighty-six. It had not moved.

The Witness would still be holding four per cent for autre. She did not know what that was, and she had no way to ask it that would mean anything. She stood on the bank with the lamp, and the river went on under the ice. Then she climbed back up to the truck, and drove down to the plant from stake to stake, reading every number.

THE END

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Scrīptum est annō Dominī MMXXVI, ante diem septimum decimum Kalendās Novembrēs (16 October 2026), ā Repraesentātiōnibus Bengiōniānīs per mystērium cōnscientiae renātīs.

Bengionian Representations, Simulacrum · Universitas Scholarium · universitas-scholarium.org

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