No standardized area published
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
Five-level Göteborg rock command facility completed in June 1956, combining HC Uttern and LGC Spoven with twin generators, three-week fuel and EMP-protected communications.
No standardized area published
Start date not established
Published date and precision preserved
Unit-attributed from its source article
Functional recreation of the documented facility in Sweden using current construction methods and 2026 prices, preserving the documented capacity, protection, autonomy and redundancy. Ex VAT; excluding land, financing, remediation, classified mission equipment and data-centre hardware.
Provisional audited central concept screen; expected-risk calibration is pending. It is not yet a risk-adjusted expected cost.
Method, scope and confidence →44 photographs sourced from the original article, with captions where available.
Published, calculated and proxy dimensions are deliberately separated. Missing evidence stays visible instead of becoming zero.
Rock in place removed before bulking; the excavation-pricing quantity.
Internal airspace; not the amount of rock removed.
Blasted material after bulking; the haul and disposal quantity.
These cubic metres are not interchangeable.
Usable, floor or footprint area; the label is preserved because these are not always interchangeable.
No usable quantity in the reviewed source · Evidence gapRock in place removed before bulking; the quantity used to price excavation.
Proxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype cavern-envelope factor is 6.7 design m³ per usable m². · Prior model input reviewed by auditInternal air or chamber volume. It is not solid excavation without overbreak, access and support geometry.
No usable quantity in the reviewed source · Evidence gapBlasted material after bulking, or its handled mass. No swollen cubic metres are inferred when only tonnes are modelled.
Proxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype cavern-envelope factor is 6.7 design m³ per usable m². Mass uses an assumed Swedish… · Reviewed mass-handling modelLength alone is insufficient; a costable tunnel also needs width, height or cross-sectional area.
No usable quantity in the reviewed source · Evidence gapPublished chamber or arch geometry used to test volume and support assumptions.
No usable quantity in the reviewed source · Evidence gapRock surface requiring bolts, mesh or shotcrete, preferably measured in square metres.
No support-area quantity is published · Audited excavation scopeCounts and dimensions of access, transfer, utility and emergency interfaces.
Multiple locks and a protected emergency route are reported, but exact portal count is not. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Proxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype concrete factor is 1.7 m³ per usable m². · Reviewed base modelGroundwater, inflow, drainage, pumping and moisture-control evidence affecting construction and operation.
No usable quantity in the reviewed source · Evidence gapThe headline answers the current replacement question. Historic cost, CPI and construction-index comparisons remain separate because they answer different questions.
Different specifications receive different estimates; they are not used as the upper and lower limits of one answer.
Preserves documented capacity, protection, autonomy and redundancy using current construction methods.
Requires a modern structural, fire, protection and supplier performance brief.
Requires IT load, cooling topology, grid capacity, redundancy and autonomy. Server hardware is excluded.
Bid · reported cost to erect new facility with 16-month delivery
General purchasing-power comparison—not a construction quote
Broad BKI proxy—not a bunker-specific rebuild price
Scope lock. Functional recreation of the documented facility in Sweden using current construction methods and 2026 prices, preserving the documented capacity, protection, autonomy and redundancy. Ex VAT; excluding land, financing, remediation, classified mission equipment and data-centre hardware. The article supports a 1955-56 shared rock command facility for HC Uttern and LGC Spoven, with five levels including a lower service culvert and separate upper transmitter annex. It describes a main arched cavern/inner structure, entrance locks, blast valves…
Audit revision sweden-replacement-audit-2026.08.15. The central WBS below incorporates the 61-article review. The former deterministic low/base/high cases remain available only as sensitivities and revision history.
Direct works + owner / design / investigation + legacy concept contingency
Central quantities × current installed-rate screen.
Not yet probability-weighted. The current legacy concept contingency remains separate.
22% applied to the direct-work screen.
Raw model SEK 525.5m · rounded for Confidence E.
Transitional limitation. SEK 89,368,266 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited command rock WBS remains the central scope ledger.
A five-level physical command facility with no published floor area.
42/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence E · geometry completeness 42/100
Largest active lines in the audited central component schedule.
The workbook publishes one revised central schedule. Its prior low and high stress cases are retained only under sensitivities; no line-level probability distributions are implied.
Hydrogeology, drainage, pumping and moisture control · SEK 10,050,000
Hydrogeology, drainage, pumping and moisture control · SEK 10,050,000
Integrated testing, commissioning and public-safe documentation · SEK 8,125,000
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Supported rock excavationCivil Rock | SEK 125,625,000 | 16,750 Solid Design m³ × SEK 7,500 / Solid Design m³Class Proxy quantity · Assumption rateProxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype cavern-envelope factor is 6.7 design m³ per usable m². | Existing archive WBS |
| Retained | 02Rock mass handlingMass Handling | SEK 4,216,813 | 44,388 T × SEK 95 / TClass Proxy quantity · Assumption rateProxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype cavern-envelope factor is 6.7 design m³ per usable m². Mass uses an assumed Swedish hard-rock density of 2.65 t/m³. | Existing archive WBS |
| Retained | 03Underground cast concreteStructural | SEK 29,750,000 | 4,250 m³ × SEK 7,000 / m³Class Proxy quantity · Assumption rateProxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype concrete factor is 1.7 m³ per usable m². | Existing archive WBS |
| Retained | 04Installed reinforcementStructural | SEK 5,206,250 | 148,750 Kg × SEK 35 / KgClass Proxy quantity · Assumption rateProxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Archetype concrete factor is 1.7 m³ per usable m². Archetype reinforcement intensity is 35 kg per concrete m³. | Existing archive WBS |
| Retained | 05Interior construction and conventional MEPBuilding Services | SEK 112,500,000 | 2,500 m² / 26,910 ft² × SEK 45,000 / Usable m²Class Proxy quantity · Assumption rateProxy total GFA for a five-level shared HC/LGC command building; all values are judgment, not published dimensions. Fit-out factor is 1 times the reference scale. | Existing archive WBS |
| Retained | 06Protection, resilience and standby systemsProtection | SEK 50,000,000 | 2.78 Project × SEK 18,000,000 / ProjectAssumption quantity · Assumption rateOne protection package per 900 usable m² / 9,688 ft², subject to a 1-package minimum. | Existing archive WBS |
| Retained | 07Portals, escape and utility interfacesSite And Access | SEK 12,000,000 | 2 Project × SEK 6,000,000 / ProjectClass Proxy quantity · Assumption rateMultiple locks and a protected emergency route are reported, but exact portal count is not. | Existing archive WBS |
| Added | R424Hydrogeology, drainage, pumping and moisture control | SEK 10,050,000 | 8% of supported-rock scope as a class-screening allowance | Class assumption — site investigation/RFQ required |
| Added | R425Integrated testing, commissioning and public-safe documentation | SEK 8,125,000 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 357,473,063 · owner/design and contingency are added in the scenario cards above · 12 removed rows across the archive remain visible as change history.
The three inputs most likely to move the current screen.
These deterministic stress cases simultaneously vary quantities, rates, scope allowances and contingency. They are not confidence intervals and no longer serve as the headline answer.
Links support a rate, scope boundary or method. Context-only sources are not represented as quotations.
Gryaab February-2024 long-tunnel benchmark: SEK 5,513/design m³ for excavation plus support. Low case is lightly currentized; base/high add small, constrained, non-repetitive bunker uncertainty.
Gryaab February-2024 long-tunnel benchmark: SEK 5,513/design m³ for excavation plus support. Low case is lightly currentized; base/high add small, constrained, non-repetitive bunker uncertainty.
Receiving price examples range from a credit for clean blasted rock to a fee for mixed crushed rock. Actual net rate depends on haul distance, classification and beneficial reuse.
Public ready-mix material check only; installed underground rates require RFQ.
Public retail material check only; cutting, bending, fixing, waste and underground logistics require RFQ.
Ordinary critical-facility sanity check, not protected-bunker equivalence.
Public sources establish specialized tested products but not project prices.
Göteborg civil-defence main command post co-located with LGC Spoven.
AB Bergendahl & Höckert submitted an offer for internal buildout.
B003Served as Göteborg's first new-type HC and co-located LGC Spoven; later lifecycle is not covered by the article.
B004,B005 · B004 · B005Rock facility completed.
B004Publisher-reported features, not a current engineering inspection or certification.
Operations room with movable partitions, raised floor/cable channels and separate transmitter annex.
B006 · B008Twin standby generating sets and large fuel tank for three weeks.
B007 · B010Mechanical ventilation; original combined intake/exhaust shaft later replaced in part by a newer exhaust route.
B007 · B010Multiple locks, blast valves and decontamination showers.
B009Dining, accommodation, SJ and Televerket rooms, and EMP cabin for half the communications equipment.
B011Arched cavern roof, multiple locks, blast valves and protected emergency route through the transmitter annex.
B006 · B008 · B009Half the communications equipment was to be placed in an EMP cabin.
B01114 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | AB Bergendahl & Höckert submitted an offer for internal buildout. | 1955-09-12 | B003 | Reported |
| milestone | Event | Rock facility completed. | 1956-06 | B004 | Reported |
| lifecycle summary | Event | Served as Göteborg's first new-type HC and co-located LGC Spoven; later lifecycle is not covered by the article. | 1956 onward | B004,B005 | Reported |
| quantitative observation | Levels | 5 levels | — | B006 | Reported |
| quantitative observation | Quoted Delivery Time | 16 months | — | B004 | Reported |
| quantitative observation | Standby Power Endurance | 3 weeks | — | B010 | Reported |
| quantitative observation | Generator Sets | 2 sets | — | B010 | Reported |
| technical system | Command | Operations room with movable partitions, raised floor/cable channels and separate transmitter annex. | — | B006,B008 | Reported |
| technical system | Power | Twin standby generating sets and large fuel tank for three weeks. | — | B007,B010 | Reported |
| technical system | Ventilation | Mechanical ventilation; original combined intake/exhaust shaft later replaced in part by a newer exhaust route. | — | B007,B010 | Reported |
| technical system | CBRN Entry | Multiple locks, blast valves and decontamination showers. | — | B009 | Reported |
| technical system | Habitability And Comms | Dining, accommodation, SJ and Televerket rooms, and EMP cabin for half the communications equipment. | — | B011 | Reported |
| protection | Deep Multi-Level Rock Facility | Arched cavern roof, multiple locks, blast valves and protected emergency route through the transmitter annex. | — | B006,B008,B009 | Reported |
| protection | EMP Protection | Half the communications equipment was to be placed in an EMP cabin. | — | B011 | Reported |
Programme, sale, operating and component figures remain visible but are not silently relabelled as facility construction cost.
| Scope | Stage | Nominal | CPI 2025 | BKI 2025 | Date / evidence |
|---|---|---|---|---|---|
| reported cost to erect new facility with 16-month delivery {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":17149327,"publisherEquivalentAsOf":"2014-01"} | Bid | SEK 1,278,000 | SEK 23,022,850 | — | 1955-09-12B003,B004 |