No standardized area published
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
Archived class article on road-sand silos placed in rock to keep sand above freezing, generally using a summit drop shaft and vehicle tunnel. The publisher explicitly cannot confirm alleged hidden Cold War secondary use.
No standardized area published
Start date not established
Completion date not established
No unit-attributed image published
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 →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.
Explicit representative chamber-area scenarios; no published size exists. Archetype cavern-envelope factor is 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.
Explicit representative chamber-area scenarios; no published size exists. Archetype cavern-envelope factor is 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.
Explicit representative chamber-area scenarios; no published size exists. Archetype cavern-envelope factor is 7 design m³ per usable m². · Reviewed base modelCast 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 short article describes a class of rock road-sand silos: a summit fill/drop opening and a truck tunnel descending to the draw point, sometimes with a bend that avoids reversing. It provides no named unit, count, size, shaft depth, tunnel length, systems…
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 79m · rounded for Confidence E.
Transitional limitation. SEK 13,431,500 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited sand silo rock WBS remains the central scope ledger.
The article describes a class and provides no named physical unit, count or size.
10/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence E · geometry completeness 10/100
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 2,940,000
Hydrogeology, drainage, pumping and moisture control · SEK 2,940,000
Integrated testing, commissioning and public-safe documentation · SEK 262,500
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Storage chamber, shaft and truck-tunnel excavationCivil Rock | SEK 36,750,000 | 4,900 Solid Design m³ × SEK 7,500 / Solid Design m³Assumption quantity · Assumption rateExplicit representative chamber-area scenarios; no published size exists. Archetype cavern-envelope factor is 7 design m³ per usable m². | Existing archive WBS |
| Retained | 02Rock mass handlingMass Handling | SEK 1,298,500 | 12,985 T × SEK 100 / TAssumption quantity · Derived rateExplicit representative chamber-area scenarios; no published size exists. Archetype cavern-envelope factor is 7 design m³ per usable m². Mass uses an assumed Swedish hard-rock density of 2.65 t/m³. | Existing archive WBS |
| Retained | 03Floors and shaft interfacesStructural | SEK 1,225,000 | 175 m³ × SEK 7,000 / m³Assumption quantity · Assumption rateExplicit representative chamber-area scenarios; no published size exists. Archetype concrete factor is 0.25 m³ per usable m². | Existing archive WBS |
| Retained | 05Basic loading and storage fit-outBuilding Services | SEK 5,250,000 | 350 m² / 3,767 ft² × SEK 15,000 / Usable m²Assumption quantity · Assumption rateExplicit representative chamber-area scenarios; no published size exists. Fit-out factor is 0.5 times the reference scale. | Existing archive WBS |
| Retained | 07Vehicle portal and utility interfacesSite And Access | SEK 6,000,000 | 1 Project × SEK 6,000,000 / ProjectClass Proxy quantity · Assumption rateA vehicle tunnel to the storage/drop point is part of the published class description. | Existing archive WBS |
| Added | R509Hydrogeology, drainage, pumping and moisture control | SEK 2,940,000 | 8% of supported-rock scope as a class-screening allowance | Class assumption — site investigation/RFQ required |
| Added | R510Integrated testing, commissioning and public-safe documentation | SEK 262,500 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 53,726,000 · 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.
Keep road grit unfrozen and available during winter.
No lifecycle dates were established from the public source.
4 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| technical system | Gravity Loading | Sand dropped from the mountain summit into underground storage. | — | B003,B004 | Reported |
| technical system | Vehicle Access | Tunnel led to the drop point; some layouts curved at the bottom so trucks did not need to reverse. | — | B004 | Reported |
| technical system | Passive Temperature | Rock siting maintained above-freezing conditions without a reported active heating system. | — | B003 | Reported |
| protection | Incidental Rock Enclosure | Rock emplacement primarily served thermal/operational continuity rather than a documented military protection requirement. | — | B003 | Reported |