Tolliver Station

The yard, the pump hall, the control room and the plant room. Three rooms Ortiz will give a flow and a plant rating for.

1. TV-YARD Station yard and gate Fr 1–14 published The Surveyors – The Annex: 'the station yard held more vehicles than Sarah had seen there in her life'; Terminal Black — 'shut the gate and the split stops feeding'

   On the incursion day: maintenance trucks parked anywhere that is not a doorway, a security rover across the gate, an ambulance against the pump-hall wall, two evacuation buses nose to tail, and a line of private cars being waved south one at a time. ⭐ THE STATION GATE is the valve that ends the Choice at Tolliver — shut it and the split stops feeding and the annex stops taking, and what is already in the gallery is the sump's problem for nine hours.

2. TV-PUMP Pump hall — the banks Fr 14–32 published The Surveyors – The Annex: 'the lights were still on in the pump hall with a foot of water going through it'; pump banks one and two on local control

   The pump banks. On the incursion day two banks are on local control and the upper end of Lake Ward is losing pressure; bank one drops when the external traffic operates the pumps through the control bus rather than the station sequence. The joint that lets go in the annex main was put in when the station was built. A foot of water through the hall with the lights still on.

3. TV-CTRL Control room and the control bus Fr 32–42 published The Surveyors – The Annex: 'the cabinet along the back wall read like a core sample of forty-five years of the colony's engineering budget'

   ⭐ The control bus: old enough to have acquired whole generations of adapters, each bolted on by somebody solving that year's problem and none ever removed. Maintenance trunk, yard trunk, legacy side — the visitors walk the load across all three in six minutes with no command anywhere in the station that put it there. The north-deck camera watches the water side from here.

4. TV-PLANT Plant room — treatment set, switchgear, heat-trace controls, the sump Fr 42–50 published Terminal Black – The Choice at Tolliver: 'Treatment set. Intake switchgear. Header heat trace controls. The header's own supply … There is no second set of any of that on this planet'

   ⭐⭐ THE ROOM THE COLONY CANNOT LOSE. The treatment set (fifteen cubic metres a day, every day, Peter Jones), the intake switchgear, the header's heat-trace controls and the header's own supply. The gallery sump is here, because nobody ever put four hundred cubes down a gallery. The sump pump is ninety litres a minute on the station supply. ⚠ The gallery door opens into this room, and it opens the wrong way. The repair sheet is on the wall by the door, in a hand nobody at Tolliver can still put a name to.

5. TV-ROOMS The three warm rooms Fr 14–42 published Terminal Black – The Footprint: 'three at Tolliver'

   Three rooms Ortiz will rate and sign for and will not add up. The table by the plate where Jones draws the cracked culvert crossings on Wednesday morning with his hands round a cup that has somebody else's name on it.

⭐ The gallery was the best thing at Tolliver and everybody who had ever worked there said so. You went out along it and you came back along it and you never once put your face outside.

1. TV-HEAD The header — bermed cell under the north end Fr 34–50 published Terminal Black – Tolliver: 'Four hundred cubic metres of treated water at eleven degrees, in a cell with a heat trace round the base of it that had been running since it went in'

   ⭐⭐ Four hundred cubic metres of treated water at eleven degrees in a bermed concrete cell with a metre of earth over it and a heat trace round the base that has run since it went in. It would not freeze, it needed nobody standing over it, and it could be given to people in buckets or through a pipe. Two hundred and thirty-one cubic metres the morning after the split; three hundred and twenty-five a week later; five days off full. Enough to keep a hundred and thirty people alive for a long time.

2. TV-GAL-A Gallery — station door to the weld (0–60 m) Fr 50–108 published Terminal Black – Tolliver: 'a metre and a half wide and just over two metres high, concrete, dry, with a handrail under the pipe and a cable tray on the other side'

   A metre and a half wide, just over two metres high, concrete, dry. The transfer main on brackets at head height along the west wall, a handrail under it, a cable tray on the other side. It falls toward the station — always has. Sixty metres in from the station door is the weld.

3. TV-WELD The weld at the sixty-metre mark Fr 108–112 published Terminal Black – Tolliver; The Choice at Tolliver: 'The main had split at the sixty-metre mark, at the weld'

   ⭐⭐ THE CHOICE AT TOLLIVER. Years back the slab settled at the hundred-and-forty and along most of the run behind it and took the pipe down with it. Tolliver cut the pipe at the sixty, welded it back with the strain out, and re-fixed eight metres of bracket either side — rigid ones, because rigid ones were what the store had that week. Nobody ever lagged the two hundred and ten metres. Dry and at minus twenty for five days, the steel pulled against eight metres of rigid bracket on either side of the weld. At 07:08 Jones put eleven-degree water into it under static head and the pipe began trying to grow back. At 08:09 Micah cracked the annex valve two turns and turned static head into flow. Twenty seconds later: 'The gallery's gone. It's split in the gallery. He's on the far side.'

4. TV-GAL-B Gallery — the weld to the settled slab (60–140 m) Fr 112–190 published Terminal Black – Tolliver: 'the slab had settled years back, at the hundred-and-forty'

   The run behind the settlement. Micah comes down the annex steps and along a hundred and twenty metres before he turns round: water coming out of the pipe sideways at head height right across the section, the floor a moving sheet the whole last stretch. 'Nobody's walking through that. I'm not being brave about it.'

5. TV-GAL-C Gallery — under the spillway gully to the annex steps (140–210 m) Fr 190–260 published Terminal Black – Tolliver: 'the reason it was two hundred and ten metres and not twenty was the spillway gully … the gallery goes straight under it'

   Straight under the spillway gully. On the surface the intake road goes four kilometres round the head of that gully to get from one side to the other; whoever set the gallery out did that arithmetic and got it right. The annex steps are at two hundred and ten.

6. TV-ANNEX The annex — on the far bench Fr 260–275 published The Surveyors – The Annex; Terminal Black — 'the annex stands on the far bench'; the annex outlet gauge; the annex outer door

   On the far bench, across the gully. The annex main is the only way the north main leaves the station; the joint that let go on the incursion day was put in when the station was built. The transfer valve is here – Micah cracks it two turns at 08:09 and the annex outlet gauge goes to forty and rising, 'she's taking it', the best four minutes anybody at Hart had had since the sun went out. ⚠ The annex outer door is clear. Beyond it is four kilometres of intake road round the head of the spillway, at minus twenty, in wet boots.

The lake was still liquid, which everybody in the settlement had stopped believing by about Sunday.

1. TV-INTAKE Intake and intake pumps Fr 1–14 published Terminal Black – Tolliver: 'the intake was under four metres of it and had been drawing since Friday because nobody had shut it off'

   ⭐ Under four metres of lake and drawing since Friday because nobody shut it off — and because the intake pumps are on the station's own supply, which comes off a heat-and-power take from the aquifer plant that Peter Jones fought for and was called extravagant about for ten years. That is why Tolliver is the one station on the planet still making water.