No standardized area published
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
The archive documents Billingen staff rock facility as a naval wartime headquarters in a rock cavern. Its documented role was wartime headquarters for Marindistrikt Väst with stores and workshops. Billingen cavern expanded westward with stores, workshops and two-storey wartime staff/command accommodation.
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 →25 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 programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. 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 programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. Archetype cavern-envelope factor is 6.7 design m³ per usable m². Mass uses an a… · 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.
A rock headquarters requires protected access; the source does not establish the exact portal count. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Proxy programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. 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.
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. The article spans a naval-base campus and several distinct rock facilities. In 1939 Älvsborg Radio was built at Nya Varvet, a staff rock room was blasted in Billingen's east side around 1942, and the short-wave station received a separate rock room on Hängest…
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 423.9m · rounded for Confidence E.
Transitional limitation. SEK 72,094,613 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 physical component of Nya Varvet; the published record gives two floors but no area.
25/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence E · geometry completeness 25/100
Do not add this blindly to related records. Child of se-nya-varvet; do not add this component to an inclusive Nya Varvet roll-up.
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 8,040,000
Hydrogeology, drainage, pumping and moisture control · SEK 8,040,000
Integrated testing, commissioning and public-safe documentation · SEK 6,500,000
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Supported rock excavationCivil Rock | SEK 100,500,000 | 13,400 Solid Design m³ × SEK 7,500 / Solid Design m³Class Proxy quantity · Assumption rateProxy programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. Archetype cavern-envelope factor is 6.7 design m³ per usable m². | Existing archive WBS |
| Retained | 02Rock mass handlingMass Handling | SEK 3,373,450 | 35,510 T × SEK 95 / TClass Proxy quantity · Assumption rateProxy programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. 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 23,800,000 | 3,400 m³ × SEK 7,000 / m³Class Proxy quantity · Assumption rateProxy programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. Archetype concrete factor is 1.7 m³ per usable m². | Existing archive WBS |
| Retained | 04Installed reinforcementStructural | SEK 4,165,000 | 119,000 Kg × SEK 35 / KgClass Proxy quantity · Assumption rateProxy programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. 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 90,000,000 | 2,000 m² / 21,528 ft² × SEK 45,000 / Usable m²Class Proxy quantity · Assumption rateProxy programme for a two-storey naval wartime headquarters with stores and workshops; all three values are estimating judgments. Fit-out factor is 1 times the reference scale. | Existing archive WBS |
| Retained | 06Protection, resilience and standby systemsProtection | SEK 40,000,000 | 2.22 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 rateA rock headquarters requires protected access; the source does not establish the exact portal count. | Existing archive WBS |
| Added | R320Hydrogeology, drainage, pumping and moisture control | SEK 8,040,000 | 8% of supported-rock scope as a class-screening allowance | Class assumption — site investigation/RFQ required |
| Added | R321Integrated testing, commissioning and public-safe documentation | SEK 6,500,000 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 288,378,450 · 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.
Wartime headquarters for Marindistrikt Väst with stores and workshops.
Naval-district protected headquarters period with early-1950s expansion.
B009,B011,B012Billingen cavern expanded westward with stores, workshops and two-storey wartime staff/command accommodation.
B011Secondary military use after headquarters relocation, through naval-base closure.
B012,B013Marindistrikt Väst staff moved to Greger because cover was inadequate, the facility was not nuclear-safe and the urban location was too exposed; 145 base-battalion staff took over.
B012Civil ownership and mixed reuse, with older damp sections and newer partly occupied sections.
B013,B014,B015Fortifikation-Väst began owner-authorized tours of the rock facility.
B01611 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Billingen cavern expanded westward with stores, workshops and two-storey wartime staff/command accommodation. | early 1950s | B011 | Reported |
| milestone | Event | Marindistrikt Väst staff moved to Greger because cover was inadequate, the facility was not nuclear-safe and the urban location was too exposed; 145 base-battalion staff took over. | 1960s | B012 | Reported |
| milestone | Event | Fortifikation-Väst began owner-authorized tours of the rock facility. | 2014 | B016 | Reported |
| lifecycle summary | Event | Naval-district protected headquarters period with early-1950s expansion. | 1942–1960s | B009,B011,B012 | Reported |
| lifecycle summary | Event | Secondary military use after headquarters relocation, through naval-base closure. | 1960s-1986 | B012,B013 | Reported |
| lifecycle summary | Event | Civil ownership and mixed reuse, with older damp sections and newer partly occupied sections. | 1986 onward | B013,B014,B015 | Reported |
| quantitative observation | Wartime Headquarters Floors | 2 floors | — | B011 | Reported |
| technical system | Naval Command | Two-storey wartime headquarters for the western naval district, later inherited by 145 base battalion. | — | B011,B012 | Reported |
| technical system | Logistics | 1950s expansion added stores and workshops inside Billingen. | — | B011 | Reported |
| technical system | Ventilation | Reduced ventilation in unused older sections contributed to poor climate and mould; newer sections remained in better condition at article time. | — | B014,B015 | Reported |
| protection | Limited Rating | 1950s staff facility provided only some weapon protection; cover was later judged inadequate and not nuclear-safe. | — | B011,B012 | Reported |