Floor Area · reported
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
Two-level 480 m² / 5,167 ft² type-C rock command post with well, diesel standby power and filtered overpressure, renovated in the 1960s and fitted with a later emergency exit.
Floor Area · reported
Start date not established
Completion date not established
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 →13 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.
Floor Area · reported · Publisher articleRock in place removed before bulking; the quantity used to price excavation.
Reported facility floor/shelter area is used as the screening usable-area basis. 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.
Reported facility floor/shelter area is used as the screening usable-area basis. 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. · 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.
Portal/escape interfaces are based on the published access description. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Reported facility floor/shelter area is used as the screening usable-area basis. Archetype concrete factor is 1.7 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. HC Felix is a 480 m² / 5,167 ft², two-level type-C rock command centre. The cavern was blasted and spoil removed, after which the occupied structure was cast inside the void. It had dormitories, kitchen, order room, own drilled well and diesel standby generat…
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 128.1m · rounded for Confidence D.
Transitional limitation. SEK 21,787,707 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.
No subject caveat recorded.
60/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence D · geometry completeness 60/100
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 1,929,600
Hydrogeology, drainage, pumping and moisture control · SEK 1,929,600
Integrated testing, commissioning and public-safe documentation · SEK 1,980,000
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Supported rock excavationCivil Rock | SEK 24,120,000 | 3,216 Solid Design m³ × SEK 7,500 / Solid Design m³Derived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. Archetype cavern-envelope factor is 6.7 design m³ per usable m². | Existing archive WBS |
| Retained | 02Rock mass handlingMass Handling | SEK 809,628 | 8,522 T × SEK 95 / TDerived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. 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 5,712,000 | 816 m³ × SEK 7,000 / m³Derived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. Archetype concrete factor is 1.7 m³ per usable m². | Existing archive WBS |
| Retained | 04Installed reinforcementStructural | SEK 999,600 | 28,560 Kg × SEK 35 / KgDerived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. 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 21,600,000 | 480 m² / 5,167 ft² × SEK 45,000 / Usable m²Derived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. Fit-out factor is 1 times the reference scale. | Existing archive WBS |
| Retained | 06Protection, resilience and standby systemsProtection | SEK 18,000,000 | 1 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 6,000,000 | 1 Project × SEK 6,000,000 / ProjectClass Proxy quantity · Assumption ratePortal/escape interfaces are based on the published access description. | Existing archive WBS |
| Added | R263Hydrogeology, drainage, pumping and moisture control | SEK 1,929,600 | 8% of supported-rock scope as a class-screening allowance | Class assumption — site investigation/RFQ required |
| Added | R264Integrated testing, commissioning and public-safe documentation | SEK 1,980,000 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
| Added | R265Documented access / escape interface correction | SEK 6,000,000 | Source-specific screening allowance; replace with measured tunnel/shaft/portal take-off | Derived from original-article geometry |
Active base WBS SEK 87,150,828 · 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.
Protected municipal and inter-agency command post for crisis and war.
Facility renovated.
B008Emergency exit added to satisfy newer occupancy requirements.
B008Reported in very good condition; rescue service had announced it wished to leave and future use was uncertain.
B008,B009 · B008 · B009Publisher-reported features, not a current engineering inspection or certification.
Own borehole well.
B006Diesel standby generator (KRAGG).
B006Dormitories, kitchen, operations room and facilities for rescue service, police and fire brigade.
B003 · B006Overpressure, fast-closing air valves, aerosol and carbon filters.
B007Reported full-hit protection against artillery projectiles and aircraft bombs up to 500 kg, plus blast and radiation protection from nuclear weapons.
B00711 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Facility renovated. | 1960s | B008 | Reported |
| milestone | Event | Emergency exit added to satisfy newer occupancy requirements. | 1990s | B008 | Reported |
| lifecycle summary | Event | Reported in very good condition; rescue service had announced it wished to leave and future use was uncertain. | article date | B008,B009 | Reported |
| quantitative observation | Floor Area | 480 m² / 5,167 ft² | — | B006 | Reported |
| quantitative observation | Floors | 2 floors | — | B006 | Reported |
| quantitative observation | Rated Conventional Bomb Mass | 500 kg | — | B007 | Reported |
| technical system | Water | Own borehole well. | — | B006 | Reported |
| technical system | Power | Diesel standby generator (KRAGG). | — | B006 | Reported |
| technical system | Habitability And Command | Dormitories, kitchen, operations room and facilities for rescue service, police and fire brigade. | — | B003,B006 | Reported |
| technical system | CBRN Ventilation | Overpressure, fast-closing air valves, aerosol and carbon filters. | — | B007 | Reported |
| protection | Type C Rock Facility | Reported full-hit protection against artillery projectiles and aircraft bombs up to 500 kg, plus blast and radiation protection from nuclear weapons. | — | B007 | Reported |