Approved by Duncan himself · Resolution 1956/12/1 n.83bis

Bunker 101 — General Arrangement

The complete drawing set of the shelter as it stands in 2058: one central well, three concentric rings, fourteen sectors per level. Twelve sheets from the gate to Zone 1K, with room schedules, plant data and the places where things went wrong.

DesignDuncan & Schneider Industries

Excavation1954–1956

Sealed1959

Survey2058

IssueRev. C

§ 1

Reading the set

One well, three rings, fourteen sectors. Duncan did not dig corridors — he sank a shaft. The Well is a vertical silo 26 m across, driven 96 m through the rock; the floor plates were inserted afterwards, one per level, which is why every ceiling in Bunker 101 is a steel deck and every floor drums underfoot. From each plate the accommodation radiates outward in two concentric bands, separated by ring corridors.

Nothing is direct. The Well opens onto Ring 0 only. Ring 0 reaches Ring 1 through two radial passages at north and south; Ring 1 reaches the perimeter gallery through two more at east and west. The offsets are a blast measure, and they have a social consequence Duncan may not have intended: to go anywhere, you walk a quarter of a circle in public.

The perimeter gallery is the Gallery of common speech. Its northern arc and its southern arc are wide enough for Bounce; the south-eastern arc was never finished.

Four plates, not seven. Duncan sank seven. In 2033 the barriers closed and the bottom three — the Great Hall, the computer plate and the core — were released to Zone 1K and never recovered. 0K is now Levels 1 to 4. Everything below is drawn here because people still go down there, in suits, on a clock.

Numbering. Every room reads L-S-RR: level, sector, room. Sectors run 1 to 14 clockwise from north and hold their bearing on every level, so 3-2 is the same wedge of rock on the residential level that 4-2 is on the plant level. The notorious Sector 32 is not a mystery but an address: level 3, sector 2.

Fourteen, not twelve. The residential ring has fourteen bays — seven blocs, two families each. Six blocs live here. Two bays are welded shut. The geometry says what the archive does not.

Access. A all citizens · B duty qualification · C commission or Synergy · D President and Sentinels · Z suit and Zone clearance.

The wet stack. Every washroom, washhouse, bath house and riser chamber in the installation stands in sector 5 or sector 9, on every plate, one directly above the other. Two vertical stacks, short runs, no crossings — Schneider's economy. It also means the sanitary rooms of seven levels share two pipes, and a pipe carries sound as willingly as it carries water.

The dirty quarter. Sectors 1 to 5 on Level 4 are the zone gate: airlock, wash-down, suit room, ready room, with the spares and the test rig behind them in the inner ring and the descent to 1K directly under the airlock floor. A suit is never carried through a room that anyone lives in. The original 1959 gate on Level 1 is still there and still works, which is why some rooms appear twice in this set.

Use. Click any room in a plan; measurements, access and the note appear beneath it. The schedule under each sheet carries the same figures, computed from the drawn geometry.

Revision C — what changed at this issue

Three plates lost, not one. Levels 5, 6 and 7 were released to Zone 1K when the barriers closed in 2033 — the Great Hall, the computer plate and the core. 0K is now Levels 1 to 4.
Marilyn is in the Zone. The machine is unharmed behind her mantle, but nobody stands in the room with her. The installation speaks to its computer through one cable bundle and a card hopper.
Both control rooms are provisional, built into plant space on Level 4 in 2034 and called provisional for twenty-five years. Marilyn standby batteries stayed below: changing them is a suited job against a sixty-minute clock.
The Great Hall is drawn. An auditorium for 480 and a refectory for 240, abandoned in an afternoon; the cinema and canteen on the Concourse are the small replacements built out of what could be carried up.
Decks A and C have their own sheets. What is actually stored on 308 cold berths turns out to be the most interesting question in the set.
The zone gate moved down to Level 4, with airlock, wash-down, suit room and ready room in four adjacent sectors and the descent directly beneath. A contaminated suit no longer crosses a room anyone lives in. The 1959 gate on Level 1 is retained as the secondary route to the construction adits.
Sanitary rooms are stacked. Every washroom, washhouse and riser chamber in the installation sits in sector 5 or sector 9, one above the other, on every plate.

§ 2

Plant data

Air, water, heat and floor area are figured against occupancy, so a failure anywhere in this table has consequences everywhere else in it. Floor areas are summed from the drawn rooms, not asserted.

Quantity	Design 1959	Actual 2058	Note
Occupancy	480 citizens	130	The shelter carries four times the people it holds. Two thirds of the bedrooms are cold.
Excavated volume	386 000 m³	—	Well 51 000 m³; levels 118 000 m³; tunnel system and Zone the remainder.
Drawn floor area, 0K	—	7 400 m² heated	Summed from the room schedules of Levels 1 to 4 and the gate complex. Levels 5 to 7 are not counted — they belong to the Zone.
Supply air, filtered	1 440 m³/h	390 m³/h	3 m³/h per place to civil shelter practice; 95 % recirculated.
Overpressure, 0K to 1K	120 Pa	85 Pa	The cascade always runs outward. When it fails, the Zone comes in.
Water	1,2 l/s from the deep well	0,8 l/s	Cisterns 2 400 m³, 59 days at full occupancy, 217 days at present.
Core output	40 MW thermal	6,2 MW electrical	Shelter load 1,4 MW; accelerator up to 4 MW during a Reboot.
Heat rejection	1 100 kW into the rock	—	128 boreholes at 180 m. Twelve have been dead since 2049.
Temperature	13 to 16 °C	13 to 18 °C locally	Set by the rock at this depth, not by heating. The shelter cools; it never warms.
Lost to the Zone in 2033	3 plates	—	Great Hall, computer plate and core cavern, plus the accelerator tunnels. Half of what Duncan excavated for people.
Rock cover	310 m	—	Designed against cobalt weapons: no line of sight, no way in from above.

§ 3

Where four hundred and eighty people slept

The residential ring is not one floor but three. Duncan sank the Well to its full depth and the builders inserted decks into the residential band as the population grew — Deck B first, in 1956, then C, then A. Fourteen bays on each deck, eleven berths to a bay: 462 berths, with the remaining eighteen places in the nursery and the sickbay.

Today one hundred and thirty citizens occupy twelve bays on Deck B. Deck C was emptied in 2035 and holds stores. Deck A was shut down in 2039 to save heat and has not been lit since. The missing three hundred and seventy are not missing — their beds are still made, one deck up and one deck down. Both cold decks are drawn in full on sheets 05 and 06, because what has been put on three hundred and eight abandoned berths over twenty-three years is worth a plan of its own.

Section through the residential band, cut across the Well. The three decks are identical; only Deck B is heated and lit. A citizen who wants to disappear for an afternoon does not need the Zone — a stair and an unlocked deck door will do.

Population, 1959 to 2058. The line does not fall because of the catastrophes — it steepens at each one and never recovers, because the licence system has not matched the death rate since 2035. Marilyn's projection of 2054 was not a revelation. It was this line, extended.

SHEET 00

Section A–A through the Well

Scale1:4000 LookingNorth Range0 to −365 m

Duncan sank seven plates. Four are still the shelter. In 2033 the barriers closed and the bottom three went to the Zone in an afternoon — the hall where everyone ate, the machine that keeps everyone alive, and the core that powers it. The installation has spent twenty-five years talking to its own basement through one cable bundle and a hundred-millimetre sanitary stack.

§ 4

Canon, invention and hypothesis

The Bunker 101 sources are dense on people and nearly silent on rooms. This table separates what the material states from what this drawing set decided, so nothing here is mistaken for established fact at the table.

Element	Status	Basis
Zones 0K / 1K / 10K and their survival times	canon	60 minutes suited, 5 unsuited, under a minute outside.
Antimatter core, event horizon, echoes on the terminals	canon	Schneider's design, triggered by plutonium fission, continuously stabilised.
Accelerator running for kilometres through the tunnels	canon	Commissioned by Duncan for transmutation; essential to the Reboot.
Marilyn behind more than a metre of concrete	canon	Stated in the setting, with redundancy in power, processing and indicators.
The South Gallery, with debris and sharp metal at its edge	canon	From the 2057 deaths — hence an unfinished arc of the perimeter gallery here.
Sector 32 neglected, with isolation and ventilation protocols of its own	canon	The 2038 ceremony, the triggered protocols, more than fifteen dead.
Duct 4B and its collapse in 2058	canon	Designed by TerraThree Alpha, built by EsaSix Alpha, two dead.
13 to 16 °C all year	canon	From the costume guidance; given a physical cause here rather than asserted.
Radial plan: one well, concentric rings, radiating sectors	drawn from the artwork	The approved 1956 blueprint shows exactly this: a central drum, concentric rings, radial spokes, and a stack of thin decks in section.
An entire section lost in 2033, permanently contaminated	canon	Stated of the failed Reboot: when the barriers reopened, a section of the Bunker was gone and dozens of Vault and Core Op working nearby were trapped. Here that section is Levels 5, 6 and 7.
A large cinema and a large canteen with kitchen, abandoned and replaced by small ones	from the table	Supplied as a premise for this revision. It gives the Concourse cinema and canteen their origin and explains why they are undersized for a design population and oversized for the present one.
Marilyn reachable only through terminals	from the table	Consistent with the mantle: 1,2 m of concrete keeps radiation out as well as interference. The machine is intact and unreachable, which is a different problem from a machine that is broken.
Depth 310 m, inserted floor plates, spring-mounted structures	invention	Standard practice for hardened installations of the 1954–56 period.
Three gates in series, decontamination line, two doglegs	invention	Standard civil and military shelter practice against blast and direct radiation.
Numbering level–sector–room; fourteen sectors	invention	Makes Sector 32 an address, and makes fourteen residential bays for seven blocs.
Sectors 3-1 and 3-2 were the SevenSecta quarters	hypothesis	The bloc was exiled in 2035; three years later unwatched rituals were held in exactly such a place. An empty pair of bays with its own filter branch explains the neglect, the absent surveillance and the protocols that fired in 2038. Not evidenced.
Pavese died in the flood system	hypothesis	Computer halls of this vintage are protected by gas flooding. The Sentinels bolted the doors and opened them minutes later. The alternative reading in the sources is Thatcher's Lethe gas. Both are interpretation.
480 design places, 130 today, three decks	invention	Answers where the other 370 slept, and explains cold sectors and the maintenance backlog.
All dimensions, areas, capacities and loads	invention	Figured against one another so that a failure has consistent consequences.