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 later-generation FTN trunk-network link station in a thick-walled concrete bunker with full EMP protection, 40 m mast, redundant transmission routes, dual diesel generation, battery ride-through and environmental control, embedded in a national network history.
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 →11 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.
The audited morphology is not a rock-excavation class. · Audited morphologyInternal 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 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.
Rock-support surface does not apply to this audited morphology. · Audited morphologyCounts and dimensions of access, transfer, utility and emergency interfaces.
No usable quantity in the reviewed source · Evidence gapCast 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. The article combines national FTN history with one anonymous later-generation trunk-network link station. The focal station is a thick-walled green concrete bunker protected against EMP, with a 40 m antenna mast, ventilation/temperature control, dual diesel g…
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 101.2m · rounded for Confidence E.
Transitional limitation. SEK 17,206,875 is still a blanket concept contingency, not probability-weighted expected risk. This is why the amount is labelled provisional. The audited telecom protected WBS remains the central scope ledger.
One anonymized focal later-generation FTN node, not the national network.
20/100 article-geometry completeness. Detailed source extraction is available in the original-article audit.
Confidence E · geometry completeness 20/100
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.
No explicit active base-WBS line.
No explicit active base-WBS line.
Integrated testing, commissioning and public-safe documentation · SEK 3,277,500
| Change | Scope | Audited base | Quantity / rate basis | Provenance |
|---|---|---|---|---|
| Retained | 05Secure technical building or inner fit-outBuilding | SEK 11,550,000 | 350 m² / 3,767 ft² × SEK 33,000 / Usable m²Class Proxy quantity · Assumption rateProxy for a thick-walled protected telecom node with equipment, power and environmental rooms. | Existing archive WBS |
| Retained | 06Physical protection and resilienceProtection | 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 | 09Radio, transmission, power and cooling packageMission Systems | SEK 45,000,000 | 1 Site × SEK 45,000,000 / SiteAssumption quantity · Assumption rateThe estimate subject covers 1 facility. | Existing archive WBS |
| Added | R286Integrated testing, commissioning and public-safe documentation | SEK 3,277,500 | 5% of MEP/protection/mission-system scope | Class assumption — commissioning plan required |
Active base WBS SEK 68,827,500 · 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 sources establish specialized tested products but not project prices.
The cited large-tunnel electrical award is a macro systems cross-check only; node package values are assumptions.
Maintain resilient military telecommunications despite grid loss, sabotage, bombing, EMP and loss of network routes.
Design of a modern Air Force telecommunications structure began after parliamentary decision.
B009Nationwide radio-relay network proposed.
B010FFRL/FTN evolved through analogue, digital, packet and IP generations while retaining hardened node principles.
B011,B013,B015,B016,B017,B018Expanded nationwide FFRL construction approved.
B011FFRL substantially nationwide; later integrated into FTN.
B011,B013Digital radio-relay trial at 34 Mbit/s began.
B015MILPAK packet-data service introduced.
B016New digital network exchanges introduced.
B017Last analogue network exchange removed.
B017Försvarsmakten decided to introduce FM IP-nät.
B01823 reviewed claims. Evidence locators resolve against the stored article hash or archived snapshot.
| Subject | Claim | Value | Date | Evidence | Certainty |
|---|---|---|---|---|---|
| milestone | Event | Design of a modern Air Force telecommunications structure began after parliamentary decision. | 1948 | B009 | Reported |
| milestone | Event | Nationwide radio-relay network proposed. | 1950 | B010 | Reported |
| milestone | Event | Expanded nationwide FFRL construction approved. | 1954 | B011 | Reported |
| milestone | Event | FFRL substantially nationwide; later integrated into FTN. | 1960s | B011,B013 | Reported |
| milestone | Event | Digital radio-relay trial at 34 Mbit/s began. | late 1970s | B015 | Reported |
| milestone | Event | MILPAK packet-data service introduced. | circa 1980 | B016 | Reported |
| milestone | Event | New digital network exchanges introduced. | 1989 | B017 | Reported |
| milestone | Event | Last analogue network exchange removed. | 1993 | B017 | Reported |
| milestone | Event | Försvarsmakten decided to introduce FM IP-nät. | 1996 | B018 | Reported |
| lifecycle summary | Event | FFRL/FTN evolved through analogue, digital, packet and IP generations while retaining hardened node principles. | 1950s onward | B011,B013,B015,B016,B017,B018 | Reported |
| quantitative observation | Mast Height | 40 m | — | B004 | Reported |
| quantitative observation | Initial Digital Link Capacity | 34 Mbit per s | — | B015 | Reported |
| quantitative observation | Mid 1990s Link Capacity | 155 Mbit per s | — | B017 | Reported |
| quantitative observation | Later Link Capacity | 310 Mbit per s | — | B017 | Inferred |
| quantitative observation | High Resilience Route Count | 4 routes | — | B022 | Reported |
| quantitative observation | Backup Generators | 2 diesel generators | — | B026 | Reported |
| technical system | Transmission | Radio-relay and cable paths, later digital and IP services, with route diversity at important subscribers. | — | B011,B017,B018,B022 | Reported |
| technical system | Power | Dual diesel generators, battery ride-through and large diesel tanks for prolonged grid-independent operation. | — | B026 | Reported |
| technical system | Environment | Ventilation and temperature-control equipment protect telecommunications hardware. | — | B024 | Reported |
| technical system | Security | Technical intrusion alarm and controlled protected-object access. | — | B027 | Reported |
| protection | Reinforced Concrete And EMP | Focal later-model bunker is described as thick-walled concrete and fully protected against EMP. | — | B004 | Reported |
| protection | Balanced Hardening | Trunk sites were protected against detection, sabotage, bomb effects and EMP in balance with their subscribers. | — | B025 | Reported |
| protection | Terrain Adaptation | Sites and antenna supports were minimized and terrain-adapted to reduce detection. | — | B025 | Reported |