No standardized area published
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
An anonymized former military storage cavern in western Sweden with a 30 m shock tunnel, heavy door and rolling concrete barrier, three internal storage ships and a detached sheet-metal-and-timber inner building.
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 →20 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.
Published maximum internal height is 3 m for the largest ship; excavation scenarios add geometry/access/support uncertainty. · 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.
Published maximum internal height is 3 m for the largest ship; excavation scenarios add geometry/access/support uncertainty. 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.
Shock Tunnel Length · Publisher articlePublished 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.
One angled shock tunnel/entrance system is described. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Largest storage ship is 60 × 20 m = 1200 m² / 12,917 ft²; two smaller ships are each reported at roughly half that size, giving 2400 m² / 25,833 ft² total. Archetype concrete factor is 0.35 m³ per usable m². · Reviewed base modelGroundwater, inflow, drainage, pumping and moisture-control evidence affecting construction and operation.
Drainage And Isolation · 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. The article provides useful storage-cavern geometry: a little over 30 m shock tunnel; one main 60 m by about 20 m chamber with maximum height about 3 m; and two smaller chambers each roughly half the main size, implying about 2,400 m² / 25,833 ft² of chamber…
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 172.6m · rounded for Confidence D.
Transitional limitation. SEK 29,351,250 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited storage rock WBS remains the central scope ledger.
No subject caveat recorded.
74/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence D · geometry completeness 74/100
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 5,400,000
Hydrogeology, drainage, pumping and moisture control · SEK 5,400,000
Integrated testing, commissioning and public-safe documentation · SEK 1,440,000
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Storage-cavern excavation and supportCivil Rock | SEK 67,500,000 | 9,000 Solid Design m³ × SEK 7,500 / Solid Design m³Class Proxy quantity · Assumption ratePublished maximum internal height is 3 m for the largest ship; excavation scenarios add geometry/access/support uncertainty. | Existing archive WBS |
| Retained | 02Rock mass handlingMass Handling | SEK 2,385,000 | 23,850 T × SEK 100 / TClass Proxy quantity · Derived ratePublished maximum internal height is 3 m for the largest ship; excavation scenarios add geometry/access/support uncertainty. Mass uses an assumed Swedish hard-rock density of 2.65 t/m³. | Existing archive WBS |
| Retained | 03Concrete floors and barriersStructural | SEK 5,880,000 | 840 m³ × SEK 7,000 / m³Derived From Published quantity · Assumption rateLargest storage ship is 60 × 20 m = 1200 m² / 12,917 ft²; two smaller ships are each reported at roughly half that size, giving 2400 m² / 25,833 ft² total. Archetype concrete factor is 0.35 m³ per usable m². | Existing archive WBS |
| Retained | 05Storage fit-out and basic servicesBuilding Services | SEK 28,800,000 | 1,920 m² / 20,667 ft² × SEK 15,000 / Usable m²Derived From Published quantity · Assumption rateLargest storage ship is 60 × 20 m = 1200 m² / 12,917 ft²; two smaller ships are each reported at roughly half that size, giving 2400 m² / 25,833 ft² total. Fit-out factor is 0.8 times the reference scale. | Existing archive WBS |
| Retained | 07Portal, loading and utility interfacesSite And Access | SEK 6,000,000 | 1 Project × SEK 6,000,000 / ProjectPublished quantity · Assumption rateOne angled shock tunnel/entrance system is described. | Existing archive WBS |
| Added | R311Hydrogeology, drainage, pumping and moisture control | SEK 5,400,000 | 8% of supported-rock scope as a class-screening allowance | Class assumption — site investigation/RFQ required |
| Added | R312Integrated testing, commissioning and public-safe documentation | SEK 1,440,000 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 117,405,000 · 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.
Protected storage of military materiel including ammunition and barbed wire.
Transferred into civilian ownership.
B003Civil workshop/storage reuse with owner-installed renewable and climate systems.
B003,B009New owner rebuilt the entrance shed and installed autonomous energy and climate systems.
B004,B009Protected storage of ammunition and general defence materiel.
B003,B01014 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Transferred into civilian ownership. | 2000 | B003 | Reported |
| milestone | Event | New owner rebuilt the entrance shed and installed autonomous energy and climate systems. | after 2000 | B004,B009 | Reported |
| lifecycle summary | Event | Protected storage of ammunition and general defence materiel. | military era | B003,B010 | Reported |
| lifecycle summary | Event | Civil workshop/storage reuse with owner-installed renewable and climate systems. | 2000 onward | B003,B009 | Reported |
| quantitative observation | Shock Tunnel Length | 30 m | — | B007 | Reported |
| quantitative observation | Storage Ships | 3 spaces | — | B008 | Reported |
| quantitative observation | Largest Storage Ship | {"length":60,"width":20,"maximumHeight":3} | — | B008 | Reported |
| quantitative observation | Smaller Ship Relative Size | 0.5 fraction of largest each | — | B009 | Reported |
| technical system | Logistics | Camouflaged loading shed accepted two trucks on each side of a central concrete dock; exhaust extraction permitted running engines. | — | B004,B005 | Reported |
| technical system | Drainage And Isolation | Freestanding inner structure used sheet-metal walls/roof, treated timber roof beams and perimeter gravel drains separated from wet rock. | — | B008 | Reported |
| technical system | Owner Added Energy | Solar panels, owner-developed wind turbines, batteries, heating/dehumidification and a later backup generator. | — | B009 | Reported |
| protection | Shock Tunnel And Barriers | Angled 30+ m shock tunnel, thick blast door and movable concrete shock barrier. | — | B007 | Reported |
| protection | Armed Entrance Defence | Gun foundation and firing slit covered the entrance. | — | B007 | Reported |
| protection | Camouflage | Entrance shed and surface stores used false features to resemble ordinary rural buildings. | — | B004,B006 | Reported |