Focal Floor Area · reported
Assembling intelligence…
Reading listings, research log, and source-health evidence.
BunkerStrategyIntelligence terminalBunkerStrategyIntelligence terminalReading listings, research log, and source-health evidence.
The only near-complete preserved LGC reported by the publisher: a buried reinforced-concrete air-defence group centre inaugurated in 1954, over 200 m² / 2,153 ft², staffed by ten personnel plus a commander and operational for 40 years, within a detailed STRIL 50 class history.
Focal Floor Area · reported
Published date and precision preserved
Published date and precision preserved
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 →12 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.
Focal Floor Area · reported · Reviewed dossier fieldRock in place removed before bulking; the quantity used to price excavation.
12% of structural scope as a buried-class screen · Audit revisionInternal 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 rock mass-handling scope applies to the audited morphology. · Audited morphologyLength alone is insufficient; a costable tunnel also needs width, height or cross-sectional area.
No tunnel geometry applies to the audited morphology. · Audited morphologyPublished 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.
Rock-support surface does not apply to this audited morphology. · Audited morphologyCounts and dimensions of access, transfer, utility and emergency interfaces.
Archetype portal/escape count. · Reviewed base modelCast inner structures and linings, kept separate from excavated rock and reinforcement mass.
Reported facility floor/shelter area is used as the screening usable-area basis. Archetype concrete factor is 2 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 distinguishes the national LGC class from one preserved focal facility. It supports 64 LGCs in STRIL 50, a 150 m² / 1,615 ft² type design, and one preserved buried concrete bunker of just over 200 m² / 2,153 ft² for ten operators plus a commander,…
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 43.2m · rounded for Confidence E.
Transitional limitation. SEK 7,352,000 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited command buried WBS remains the central scope ledger.
One preserved focal LGC; national LGC counts are class context only.
52/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence E · geometry completeness 52/100
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.
Excavation, temporary works, waterproofing and backfill · SEK 336,000
Drainage, sumps and moisture control · SEK 112,000
Integrated testing, commissioning and public-safe documentation · SEK 900,000
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 03High-mass reinforced-concrete shellStructural | SEK 2,800,000 | 400 m³ × SEK 7,000 / m³Derived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. Archetype concrete factor is 2 m³ per usable m². | Existing archive WBS |
| Retained | 04Installed reinforcementStructural | SEK 1,260,000 | 36,000 Kg × SEK 35 / KgDerived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. Archetype concrete factor is 2 m³ per usable m². Archetype reinforcement intensity is 90 kg per concrete m³. | Existing archive WBS |
| Retained | 05Interior construction and conventional MEPBuilding Services | SEK 9,000,000 | 200 m² / 2,153 ft² × SEK 45,000 / Usable m²Derived From Published quantity · Assumption rateReported facility floor/shelter area is used as the screening usable-area basis. Fit-out factor is 1 times the reference scale. | Existing archive WBS |
| Retained | 06Protection, resilience and standby systemsProtection | SEK 9,000,000 | 0.5 Project × SEK 18,000,000 / ProjectAssumption quantity · Assumption rateOne protection package per 900 usable m² / 9,688 ft², subject to a 0.5-package minimum. | Existing archive WBS |
| Retained | 07Buried access, escape and utility interfacesSite And Access | SEK 6,000,000 | 1 Project × SEK 6,000,000 / ProjectAssumption quantity · Assumption rateArchetype portal/escape count. | Existing archive WBS |
| Added | R271Excavation, temporary works, waterproofing and backfill | SEK 336,000 | 12% of structural scope as a buried-class screen | Class assumption — earthworks take-off required |
| Added | R272Drainage, sumps and moisture control | SEK 112,000 | 4% of structural scope as a buried-class screen | Class assumption — site investigation/RFQ required |
| Added | R273Integrated testing, commissioning and public-safe documentation | SEK 900,000 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 29,408,000 · 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.
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.
Receive, collate and filter optical air-observation reports for an approximately 30 km district and forward the air picture to LFC.
Provisional LGC m/48 construction began in Uppsala, Stockholm and Gothenburg areas.
B013150 m² / 1,615 ft² LGC m/50 type facility began rollout.
B013Focal preserved facility inaugurated.
B017Forty-year operational role in optical air surveillance.
B017Operational role ended after 40 years; exact date is derived, not directly stated.
B017Original map table and some inventory scrapped to create storage space.
B019Owner planned to complete the site as a museum.
B019Mostly preserved privately, with some decommissioning loss and planned museum conversion.
B016,B01921 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Provisional LGC m/48 construction began in Uppsala, Stockholm and Gothenburg areas. | late 1940s | B013 | Reported |
| milestone | Event | 150 m² / 1,615 ft² LGC m/50 type facility began rollout. | 1950 | B013 | Reported |
| milestone | Event | Focal preserved facility inaugurated. | 1954 | B017 | Reported |
| milestone | Event | Operational role ended after 40 years; exact date is derived, not directly stated. | circa 1994 | B017 | Reported |
| milestone | Event | Original map table and some inventory scrapped to create storage space. | at decommissioning | B019 | Reported |
| milestone | Event | Owner planned to complete the site as a museum. | article era | B019 | Reported |
| lifecycle summary | Event | Forty-year operational role in optical air surveillance. | 1954-circa 1994 | B017 | Reported |
| lifecycle summary | Event | Mostly preserved privately, with some decommissioning loss and planned museum conversion. | post-closure | B016,B019 | Reported |
| quantitative observation | Original Fixed LGC Proposal | 130 facilities | — | B012 | Reported |
| quantitative observation | Original Mobile LGC Proposal | 3 facilities | — | B012 | Reported |
| quantitative observation | Planned Connected LS | 1,480 sites | — | B012 | Reported |
| quantitative observation | LGC Built Under STRIL50 | 64 facilities | — | B014 | Reported |
| quantitative observation | LS Per LGC Area | 15–25 | — | B014 | Reported |
| quantitative observation | Focal Staff | 11 persons | — | B017 | Inferred |
| quantitative observation | Annual Exercises | 5 exercises | — | B017 | Reported |
| quantitative observation | Focal Floor Area | 200 m² / 2,153 ft² | — | B018 | Reported |
| technical system | Air Picture | Operations room with map, display wall and elevated staff platform received and filtered reports from observation sites. | — | B011,B013 | Reported |
| technical system | Communications | Fixed wire/radio links connected LS sites and the superior LFC. | — | B012 | Reported |
| technical system | Power | Small diesel generator started automatically on grid failure. | — | B018 | Reported |
| protection | Buried Concrete Shell | Fully below grade, visible only through ventilation shafts and a timber-covered entrance. | — | B018 | Reported |
| protection | Qualified Bomb And Gas Protection | Publisher states resistance to smaller bombs and protection against war gases; no certified rating or shell thickness is given. | — | B018 | Reported |