No standardized area published
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
1950s district command-post expansion begun in 1956 and handed over in 1961 after defects, with 46 beds, own well/desalination and detailed estimate, bid and work-item costs.
No standardized area published
Published date and precision preserved
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 →17 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.
Area proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype cavern-envelope factor is 3 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.
Area proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype cavern-envelope factor is 3 design m³ per usable m². Mass uses an assumed Swedish hard-rock… · 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.
Rock-support surface does not apply to this audited morphology. · Audited morphologyCounts and dimensions of access, transfer, utility and emergency interfaces.
Opposed entrances and a blast-routing tunnel imply two portal interfaces. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Area proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype concrete factor is 1.8 m³ per usable m². · Reviewed base modelGroundwater, inflow, drainage, pumping and moisture-control evidence affecting construction and operation.
Water · Publisher articleThe 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.
No representative facility construction cost selected
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. This anonymous district command centre was expanded from September 1956 and handed to the municipality in 1961 after defects delayed acceptance. The article gives an unusually detailed expansion-cost record, a blast-routing tunnel with two opposed entrances,…
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 99.6m · rounded for Confidence E.
Transitional limitation. SEK 16,939,500 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited command uncertain WBS remains the central scope ledger.
Emplacement and structural material are not explicit; the estimate must branch between rock and buried concrete.
35/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence E · geometry completeness 35/100
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.
Excavation, temporary works, waterproofing and backfill · SEK 756,000
Drainage, sumps and moisture control · SEK 252,000
Integrated testing, commissioning and public-safe documentation · SEK 1,625,000
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Conditional rock excavation and supportCivil Rock | SEK 11,250,000 | 1,500 Solid Design m³ × SEK 7,500 / Solid Design m³Class Proxy quantity · Assumption rateArea proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype cavern-envelope factor is 3 design m³ per usable m². | Existing archive WBS |
| Retained | 02Conditional rock mass handlingMass Handling | SEK 397,500 | 3,975 T × SEK 100 / TClass Proxy quantity · Derived rateArea proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype cavern-envelope factor is 3 design m³ per usable m². Mass uses an assumed Swedish hard-rock density of 2.65 t/m³. | Existing archive WBS |
| Retained | 03Reinforced-concrete protected structureStructural | SEK 6,300,000 | 900 m³ × SEK 7,000 / m³Class Proxy quantity · Assumption rateArea proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype concrete factor is 1.8 m³ per usable m². | Existing archive WBS |
| Retained | 04Installed reinforcementStructural | SEK 2,677,500 | 76,500 Kg × SEK 35 / KgClass Proxy quantity · Assumption rateArea proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Archetype concrete factor is 1.8 m³ per usable m². Archetype reinforcement intensity is 85 kg per concrete m³. | Existing archive WBS |
| Retained | 05Interior construction and conventional MEPBuilding Services | SEK 22,500,000 | 500 m² / 5,382 ft² × SEK 45,000 / Usable m²Class Proxy quantity · Assumption rateArea proxy calibrated to the published 46 beds and 25-30 exercise staff; the source reports no floor area. Fit-out factor is 1 times the reference scale. | Existing archive WBS |
| Retained | 06Protection and resilient systemsProtection | SEK 10,000,000 | 0.56 Project × SEK 18,000,000 / ProjectAssumption quantity · Assumption rateOne protection package per 900 usable m² / 9,688 ft², subject to a 0.5-package minimum. | Existing archive WBS |
| Retained | 07Access, escape and utilitiesSite And Access | SEK 12,000,000 | 2 Project × SEK 6,000,000 / ProjectDerived From Published quantity · Assumption rateOpposed entrances and a blast-routing tunnel imply two portal interfaces. | Existing archive WBS |
| Added | R338Excavation, temporary works, waterproofing and backfill | SEK 756,000 | 12% of structural scope as a buried-class screen | Class assumption — earthworks take-off required |
| Added | R339Drainage, sumps and moisture control | SEK 252,000 | 4% of structural scope as a buried-class screen | Class assumption — site investigation/RFQ required |
| Added | R340Integrated testing, commissioning and public-safe documentation | SEK 1,625,000 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 67,758,000 · 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.
Skanska's Ostlanken order value is SEK 240m for handling 2.0m tonnes of rock and 0.4m tonnes of soil, excluding options. The base is the observed blended benchmark; bounds are assumptions.
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.
Protected local civil-defence command post.
Facility was designed.
B004Expansion began.
B004Handover followed late after defects found at final inspection.
B004Taken out of service.
B016Decision taken to leave the facility; article reports it remained largely untouched with ventilation left on.
B003,B016 · B003 · B016Publisher-reported features, not a current engineering inspection or certification.
Telephone exchanges, black dial telephones and an operations room.
B014Separate sleeping accommodation and wash point.
B014Own well later required a desalination unit after brackish water was found during an exercise.
B017Opposed entrances and blast doors intended to route nuclear blast past the facility.
B015Publisher reports direct-hit resistance to a 250 kg conventional bomb.
B01517 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Facility was designed. | early 1950s | B004 | Reported |
| milestone | Event | Expansion began. | 1956-09-10 | B004 | Reported |
| milestone | Event | Handover followed late after defects found at final inspection. | 1961 | B004 | Reported |
| lifecycle summary | Event | Taken out of service. | second half 1980s | B016 | Reported |
| lifecycle summary | Event | Decision taken to leave the facility; article reports it remained largely untouched with ventilation left on. | 1990 | B003,B016 | Reported |
| quantitative observation | Exercise Staff | 25–30 | — | B013 | Reported |
| quantitative observation | Typical Exercise Duration | 3 days | — | B013 | Reported |
| quantitative observation | Male Sleeping Places | 30 beds | — | B014 | Reported |
| quantitative observation | Female Sleeping Places | 16 beds | — | B014 | Reported |
| quantitative observation | Total Sleeping Places Derived | 46 beds | — | B014 | Inferred |
| quantitative observation | Reported Direct Hit Bomb Mass | 250 kg | — | B015 | Reported |
| quantitative observation | Reported Bomb Mass To Defeat Facility | 250–500 | — | B015 | Reported |
| technical system | Command And Comms | Telephone exchanges, black dial telephones and an operations room. | — | B014 | Reported |
| technical system | Habitability | Separate sleeping accommodation and wash point. | — | B014 | Reported |
| technical system | Water | Own well later required a desalination unit after brackish water was found during an exercise. | — | B017 | Reported |
| protection | Blast Tunnel | Opposed entrances and blast doors intended to route nuclear blast past the facility. | — | B015 | Reported |
| protection | Conventional Weapon Protection | Publisher reports direct-hit resistance to a 250 kg conventional bomb. | — | B015 | 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 |
|---|---|---|---|---|---|
| cost component {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":64775,"publisherEquivalentAsOf":"2016"} | Other | SEK 5,000 | SEK 85,772 | — | 1956B007 |
| cost component {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":647752,"publisherEquivalentAsOf":"2016"} | Other | SEK 50,000 | SEK 857,725 | — | 1956B008 |
| construction estimate {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":9222125,"publisherEquivalentAsOf":"2016"} | Estimate | SEK 675,000 | SEK 11,579,284 | — | 1956B004 |
| cost component {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":129550,"publisherEquivalentAsOf":"2016"} | Other | SEK 10,000 | SEK 171,545 | — | 1956B011 |
| lowest bid {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":null,"publisherEquivalentAsOf":null} | Bid | SEK 875,000 | SEK 15,010,183 | — | 1956-09-10B004 |
| cost component {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":621842,"publisherEquivalentAsOf":"2016"} | Other | SEK 48,000 | SEK 823,416 | — | 1956B006 |
| grant {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":null,"publisherEquivalentAsOf":null} | Authorization | SEK 456,000 | SEK 7,822,449 | — | 1956B004 |
| cost component {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":129550,"publisherEquivalentAsOf":"2016"} | Other | SEK 10,000 | SEK 171,545 | — | 1956B010 |
| cost component {"amountBound":null,"amountQualifier":null,"unit":null,"publisherEquivalentSek":712528,"publisherEquivalentAsOf":"2016"} | Other | SEK 55,000 | SEK 943,497 | — | 1956B009 |