No standardized area published
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
Protected command centre for F 9 Säve, relocated into the new 22,000 m² / 236,806 ft² rock hangar after the 1963 Wennerström espionage case and last exercised in the 1990s.
No standardized area published
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 →7 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.
No usable quantity in the reviewed source · Evidence gapInternal 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.
No usable quantity in the reviewed source · Evidence gapLength 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 usable quantity in the reviewed source · Evidence gapCounts and dimensions of access, transfer, utility and emergency interfaces.
No usable quantity in the reviewed source · Evidence gapCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
No usable quantity in the reviewed source · Evidence gapGroundwater, 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.
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 is the F 9 Säve command centre installed inside the already-existing aircraft rock hangar after the 1963 Wennerström disclosure caused plans for a standalone command centre to be abandoned. The command centre normally held 6–8 operators, with a few extra…
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 34m · rounded for Confidence D.
Transitional limitation. SEK 5,788,125 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.
Command fit-out embedded within the F 9 hangar's already-costed rock shell.
74/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence D · geometry completeness 74/100
Do not add this blindly to related records. Child of se-f9-save-new-berghangar; never add to the inclusive parent.
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.
No explicit active base-WBS line.
No explicit active base-WBS line.
Integrated testing, commissioning and public-safe documentation · SEK 1,102,500
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Removed | 01Supported rock excavationCivil Rock | SEK 4,522,500Excluded from revision | 603 Solid Design m³ × SEK 7,500 / Solid Design m³Class Proxy quantity · Assumption rateProxy command-room area for the published six-to-eight-person crew. Archetype cavern-envelope factor is 6.7 design m³ per usable m². | Existing archive WBS |
| Removed | 02Rock mass handlingMass Handling | SEK 151,805Excluded from revision | 1,598 T × SEK 95 / TClass Proxy quantity · Assumption rateProxy command-room area for the published six-to-eight-person crew. 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 |
| Removed | 03Underground cast concreteStructural | SEK 1,071,000Excluded from revision | 153 m³ × SEK 7,000 / m³Class Proxy quantity · Assumption rateProxy command-room area for the published six-to-eight-person crew. Archetype concrete factor is 1.7 m³ per usable m². | Existing archive WBS |
| Removed | 04Installed reinforcementStructural | SEK 187,425Excluded from revision | 5,355 Kg × SEK 35 / KgClass Proxy quantity · Assumption rateProxy command-room area for the published six-to-eight-person crew. 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 4,050,000 | 90 m² / 969 ft² × SEK 45,000 / Usable m²Class Proxy quantity · Assumption rateProxy command-room area for the published six-to-eight-person crew. 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 |
| Removed | 07Portals, escape and utility interfacesSite And Access | SEK 6,000,000Excluded from revision | 1 Project × SEK 6,000,000 / ProjectAssumption quantity · Assumption rateArchetype portal/escape count. | Existing archive WBS |
| Added | R380Integrated testing, commissioning and public-safe documentation | SEK 1,102,500 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 23,152,500 · 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.
Direct command of air operations at F 9 Säve.
A command post planned outside the hangar was moved inside after the Wennerström espionage case.
B005Last reported operational exercise.
B014No longer operational; preserved as part of the parent museum environment.
B014,B015Relocated inside the new hangar and used for airbase command.
B005,B00611 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | A command post planned outside the hangar was moved inside after the Wennerström espionage case. | after 1963 | B005 | Reported |
| milestone | Event | Last reported operational exercise. | 1990s | B014 | Reported |
| lifecycle summary | Event | Relocated inside the new hangar and used for airbase command. | Cold War | B005,B006 | Reported |
| lifecycle summary | Event | No longer operational; preserved as part of the parent museum environment. | after 1990s | B014,B015 | Reported |
| quantitative observation | Parent Hangar Floor Area | 22,000 m² / 236,806 ft² | — | B003 | Reported |
| quantitative observation | Parent Hangar Rock Depth | 30 m | — | B003 | Reported |
| quantitative observation | Parent Hangar Gate Mass | 80 tonnes | — | B003 | Reported |
| quantitative observation | Command Post Crew | 6–8 | — | B006 | Reported |
| technical system | Command And Control | Operational workspace for airfield flight command. | — | B006 | Reported |
| technical system | Communications | Connections were reported still present at article time despite non-operational status. | — | B014 | Reported |
| protection | Deep Parent Rock Hangar | The KC was embedded within the new hangar roughly 30 m below rock and behind heavy gates. | — | B003,B005 | Reported |