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 Cold War protected fuel-storage complex with three large rock chambers, rail transfer, pumps, fire systems, reserve power, escape shaft and three personnel shelters; operated about four decades before emptying and decontamination began in 1993.
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 →47 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.
Publisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype cavern-envelope factor is 6 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.
Publisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype cavern-envelope factor is 6 design m³ per usable m². Mass uses an assumed Swedish hard-… · 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.
Shotcrete And Reinforcement · Publisher articleCounts and dimensions of access, transfer, utility and emergency interfaces.
One protection package per 2000 usable m² / 21,528 ft², subject to a 1-package minimum. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Publisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype concrete factor is 0.4 m³ per usable m². · Reviewed base modelGroundwater, inflow, drainage, pumping and moisture-control evidence affecting construction and operation.
Power And 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. Anonymous focal protected military fuel store with three rock chambers, a rail transfer connection, two reported tanks totaling about 2,500 m³, pumps, fire systems, reserve power, own well, an escape rise and three SK10 personnel shelters. The article's 2,500…
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 366.5m · rounded for Confidence D.
Transitional limitation. SEK 62,332,188 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited fuel storage rock WBS remains the central scope ledger.
No subject caveat recorded.
61/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence D · geometry completeness 61/100
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 9,900,000
Hydrogeology, drainage, pumping and moisture control · SEK 9,900,000
Integrated testing, commissioning and public-safe documentation · SEK 4,556,250
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 01Storage-cavern excavation and supportCivil Rock | SEK 123,750,000 | 16,500 Solid Design m³ × SEK 7,500 / Solid Design m³Derived From Published quantity · Assumption ratePublisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype cavern-envelope factor is 6 design m³ per usable m². | Existing archive WBS |
| Retained | 02Rock mass handlingMass Handling | SEK 4,372,500 | 43,725 T × SEK 100 / TDerived From Published quantity · Derived ratePublisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype cavern-envelope factor is 6 design m³ per usable m². Mass uses an assumed Swedish hard-rock density of 2.65 t/m³. | Existing archive WBS |
| Retained | 03Concrete floors, barriers and containmentStructural | SEK 7,700,000 | 1,100 m³ × SEK 7,000 / m³Derived From Published quantity · Assumption ratePublisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype concrete factor is 0.4 m³ per usable m². | Existing archive WBS |
| Retained | 04Installed reinforcementStructural | SEK 1,925,000 | 55,000 Kg × SEK 35 / KgDerived From Published quantity · Assumption ratePublisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Archetype concrete factor is 0.4 m³ per usable m². Archetype reinforcement intensity is 50 kg per concrete m³. | Existing archive WBS |
| Retained | 05Cavern services and fire systemsBuilding Services | SEK 28,875,000 | 1,925 m² / 20,721 ft² × SEK 15,000 / Usable m²Derived From Published quantity · Assumption ratePublisher-estimated floor-area range is 2500-3000 m² / 26,910-32,292 ft²; the base is the transparent midpoint. Fit-out factor is 0.7 times the reference scale. | Existing archive WBS |
| Retained | 06Protected access and resilient utilitiesProtection | SEK 24,750,000 | 1.38 Project × SEK 18,000,000 / ProjectAssumption quantity · Assumption rateOne protection package per 2000 usable m² / 21,528 ft², subject to a 1-package minimum. | Existing archive WBS |
| Retained | 07Portals and transfer interfacesSite And Access | SEK 6,000,000 | 1 Project × SEK 6,000,000 / ProjectClass Proxy quantity · Assumption rateHeavy entrance and separate escape are described. | Existing archive WBS |
| Retained | 10Fuel storage and transfer processProcess And Support | SEK 37,500,000 | 2,500 Storage m³ × SEK 15,000 / Storage m³Derived From Published quantity · Assumption rateScreening sum of a reported 500 m³ small tank and 2,000,000-litre large tank; tank inventory ambiguity remains a caveat. | Existing archive WBS |
| Added | R295Hydrogeology, drainage, pumping and moisture control | SEK 9,900,000 | 8% of supported-rock scope as a class-screening allowance | Class assumption — site investigation/RFQ required |
| Added | R296Integrated testing, commissioning and public-safe documentation | SEK 4,556,250 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 249,328,750 · 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.
Public retail material check only; cutting, bending, fixing, waste and underground logistics require RFQ.
Public sources establish specialized tested products but not project prices.
Protected wartime reserve storage and transfer of military fuel.
Approximate commissioning inferred only from the article's statement that service lasted about 40 years before 1993 emptying; not an explicit build year.
B032Emptying and decontamination began after roughly 40 years of service.
B032Approximately 40 years of protected fuel-storage service.
B032Emptied/decontaminated and later sold privately.
B032,B033Facility bought by a private owner and not sealed.
B033Electric power had reportedly been disconnected for more than five years.
B005Standing privately owned, unsealed and without working grid power.
B005,B03324 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Approximate commissioning inferred only from the article's statement that service lasted about 40 years before 1993 emptying; not an explicit build year. | circa 1953 | B032 | Reported |
| milestone | Event | Emptying and decontamination began after roughly 40 years of service. | 1993 | B032 | Reported |
| milestone | Event | Facility bought by a private owner and not sealed. | 2003 | B033 | Reported |
| milestone | Event | Electric power had reportedly been disconnected for more than five years. | 2018 visit | B005 | Reported |
| lifecycle summary | Event | Approximately 40 years of protected fuel-storage service. | Cold War to 1993 | B032 | Reported |
| lifecycle summary | Event | Emptied/decontaminated and later sold privately. | 1993–2003 | B032,B033 | Reported |
| lifecycle summary | Event | Standing privately owned, unsealed and without working grid power. | 2018 article visit | B005,B033 | Reported |
| quantitative observation | Entrance Barrier Resistance Estimate | 10–15 | — | B004 | Reported |
| quantitative observation | Escape Height | 8–9 | — | B006 | Reported |
| quantitative observation | Rock Chambers | 3 chambers | — | B008 | Reported |
| quantitative observation | Largest Reported Chamber | {"length":50,"width":6} | — | B008 | Reported |
| quantitative observation | Reported Tank Capacity Small | 500 m³ | — | B009 | Reported |
| quantitative observation | Reported Tank Capacity Large | 2,000,000 litres | — | B009 | Reported |
| quantitative observation | Second Tank Depth | 40 m | — | B009 | Reported |
| quantitative observation | Publisher Estimated Floor Area | 2500–3000 m² / 26,910–32,292 ft² | — | B010 | Reported |
| quantitative observation | Personnel Shelters | 3 SK10 shelters | — | B019 | Reported |
| quantitative observation | Capacity Per SK10 | {"lying":10,"seated":20} | — | B019 | Reported |
| technical system | Fuel Transfer | Rail siding, pipework attributed to Svenska oljeledningar, pumps and additive handling. | — | B006,B007,B018 | Reported |
| technical system | Power And Water | Own well and reserve generator. | — | B006 | Reported |
| technical system | Fire Safety | Dedicated fire-protection systems served transfer and storage areas. | — | B018 | Reported |
| technical system | Personnel Support | Locker/shower facilities outside primary storage; three SK10 shelters with manual ventilation, stove and radio. No kitchen, lodging or toilets inside the principal cavern. | — | B007,B019 | Reported |
| protection | Rock And Heavy Doors | Multiple rock chambers, heavy entry barrier and deep secondary tank location provided physical protection. | — | B004,B008,B009 | Reported |
| protection | Shotcrete And Reinforcement | Chambers used shotcrete, reinforcing steel and drainage. | — | B008 | Reported |
| protection | Escape Route | Separate 8-9 m escape route. | — | B006 | Reported |