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Future Circular Collider Feasibility Study Report: Volume 3, Civil Engineering, Implementation and Sustainability

T0 review · 3 major / 3 minor · reviewed 2026-08-16 · deepseek-v4-flash

Pith's one-line read The FCC's 90.6 km tunnel can be built with conventional, proven construction techniques, the feasibility report argues.

desk verdict A thorough, self-aware engineering feasibility report whose central claim is plausible but explicitly rides on geological data still being collected. read the letter →

arxiv 2505.00273 v1 pith:EMVQBRFA submitted 2025-04-25 physics.acc-ph hep-exhep-ph

M. Benedikt (Study Leader) , F. Zimmermann (Deputy Study Leader) , B. Auchmann , W. Bartmann , J.P. Burnet , C. Carli , A. Chancé , P. Craievich
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M. Giovannozzi C. Grojean J. Gutleber K. Hanke A. Henriques P. Janot C. Lourenço M. Mangano T. Otto J. Poole S. Rajagopalan T. Raubenheimer E. Todesco L. Ulrici T. Watson G. Wilkinson (editors) P. Azzi G. Bernardi A. Blondel M. Boscolo D. d'Enterria M. Dam J. de Blas B. Francois A. Freitas G. Ganis J. Keintzel M. Klute M. McCullough P.F. Monni F. Palla E. Perez M.-A. Pleier W. Riegler F. Sefkow M. Selvaggi (Chief Editors of Volume 1 Chapters) A. Abada M. Abbrescia H. Abdolmaleki S.H. Abidi A. Abramov C. Adam M. Ady P.R. Adz̆ić I. Agapov D. Aguglia I. Ahmed M. Aiba G. Aielli T. Akan N. Akchurin D. Akturk M. Al-Thakeel G.L. Alberghi J. Alcaraz Maestre M. Aleksa R. Aleksan F. Alharthi J. Alimena A. Alimenti S. Alioli L. Alix B.C. Allanach L. Allwicher A.A. Altintas M. Alt{i}nl{i} M. Alviggi G. Ambrosio Y. Amhis A. Amiri G. Ammirabile T. Andeen K.D.J. André J. Andrea A. Andreazza M. Andreini T. Andriollo L. Angel M. Angelucci S. Antusch M.N. Anwar L. Apolinário G. Apollinari R.B. Appleby A. Apresyan Aram Apyan Armen Apyan A. Arbey B. Argiento V. Ari S. Arias B. Arias Alonso O. Arnaez R. Arnaldi F. Arneodo H. Arnold P. Arrutia Sota M.E. Ascioti K.A. Assamagan S. Aumiller G. Ayd{i}n K. Azizi N. Bacchetta A. Bacci B. Bai Y. Bai L. Balconi G. Baldinelli B. Balhan A.H. Ball A. Ballarino S. Banerjee S. Banik D.P. Barber M.B. Barbero D. Barducci D. Barna G.G. Barnaföldi M.J. Barnes A.J. Barr R. Bartek H. Bartosik S.A. Bass U. Bassler M.J. Basso A. Bastianin P. Bataillard M. Battistin J. Bauche L. Baudin J. Baudot B. Baudouy L. Bauerdick C. Bay{i}nd{i}r H.P. Beck F. Bedeschi C. Bee M. Begel M. Behtouei L. Bellagamba N. Bellegarde E. Belli E. Bellingeri S. Belomestnykh A.D. Benaglia G. Bencivenni J. Bendavid M. Benmergui M. Benoit D. Benvenuti T. Bergauer N. Bernachot J. Bernardi Q. Berthet S. Bertoni C. Bertulani M.I. Besana A. Besson M. Bettelini S. Bettoni S. Beuvier P.C. Bhat S. Bhattacharya J. Bhom M.E. Biagini A. Bibet-Chevalier M. Bicrel M. Biglietti G.M. Bilei B. Bilki K. Bisgaard Christensen T. Biswas F. Blanc F. Blekman J. Blümlein D. Boccanfuso A. Bogomyagkov P. Boillon P. Boivin M.J. Boland S. Bologna O. Bolukbasi R. Bonnet J. Borburgh F. Bordry P. Borges de Sousa G. Borghello L. Borriello D. Bortoletto L. Bottura V. Boudry R. Boughezal D. Bourilkov M. Boyd D. Boye G. Bozzi V. Braccini C. Bracco B. Bradu A. Braghieri S. Braibant J. Bramante G.C. Branco R. Brenner N. Brisa D. Britzger G. Broggi L. Bromiley E. Brost Q. Bruant R. Bruce E. Bründermann L. Brunetti O. Brüning O. Brunner X. Buffat E. Bulyak A. Burdyko H. Burkhardt P.N. Burrows S. Busatto S. Buschaert D. Buttazzo A. Butterworth D. Butti G. Cacciapaglia Y. Cai B. Caiffi V. Cairo O. Cakir P. Calafiura R. Calaga S. Calatroni D.G. Caldwell A. Çal{i} şkan C. Calpini M. Calviani E. Camacho-Pérez P. Camarri L. Caminada M. Campajola A.C. Canbay K. Canderan S. Candido F. Canelli A. Canepa S. Cantarella K.B. Cantún-Avila L. Capriotti A. Caram A. Carbone J.M. Carceller G. Carini F. 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Durand G. Durieux Y. Dutheil I. Dutta J.S. Dutta S. Dutta F. Duval F. Eder M. Eisterer Z. El Bitar A. El Saied M. Elisei J. Ellis W. Elmetenawee J. Elmsheuser V. Daniel Elvira S.C. Eno Y. Enomoto B.A. Erdelyi O.E. Eruteya M. Escobar O. Etisken I. Eymard J. Eysermans D. Falchieri C. Falkenberg F. Fallavollita A. Afalou J. Faltova J. Fanini L. Fanò K. Fanti R. Farinelli M. Farino S. Farinon H. Fatehi J. Fatterbert A. Faure A. Faus-Golfe G. Favia L. Favilla W.J. Fawcett A. Federowicz L. Feligioni L. Felsberger Y. Feng A. Fernández Téllez R. Ferrari L. Ferreira F. Ferro M. Fiascaris C. Fiorio S.A. Fleury L. Florez M. Florio A. Fondacci B. Fontimpe K. Foraz R. Fortunati M. Fouaidy A. Foussat A. Fowler J.D. Fox M. Francesconi R. Franqueira Ximenes F. Fransesini A. Frasca J.A. Frost K. Furukawa A. Gabrielli A. Gaddi F. Gaede A. Gallén R. Galler E. Gallice E. Gallo H. Gamper S. Ganjour S. Gao A. Garand C. Garaus D. Garcia R. Garcí a Alí a R. Garcí a Gil C.M. Garcia Jaimes H. 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Gutiérrez-Rodríguez V. Guzey C. Haber T. Hacheney B. Hac{i}şahinoğlu K. Hahn J. Hajer T. Hakulinen J.C. Hammersley M. Hance J.B. Hansen B. Härer E. Hauzinger M. Haviernik B. Hegner C. Helsens Ana Henriques C. Hernalsteens H. Hernández-Arellano R.J. Hernández-Pinto M.A. Hernández-Ruíz J. Hernández-Sánchez J.W. Heron L.M. Herrmann R. Hirosky J.F. Hirschauer J.D. Hobbs K. Hock S. Höche M. Hofer G. Hoffstaetter W. Höfle M. Hohlmann F. Holdener B. Holzer C.G. Honorato H. Hoorani A. Houver E. Howling X. Huang F. Hug B. Humann P. Hunchak Y. Husein A. Hussain G. Iadarola G. Iakovidis G. Iaselli P. Iengo A. Ilg M. Iodice A.O.M. Iorio V. Ippolito U. Iriso J. Isaacson G. Isidori R. Islam A. Istepanyan S. Izquierdo Bermudez V. Izzo P.D. Jackson R. Jafari S.S. Jagabathuni S. Jana C. Järmyr Eriksson P. Jausserand M. Jensen J.M. Jimenez F.R. Joaquim O.R. Jones J. Joos E. Jourd'huy E. Jourdan J.M. Jowett A. Jueid A.W. Jung M. Kagan I. Kahraman V. Kain J. Kalinowski J.F. Kamenik A. Kanso T. Kar S.O. 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Marin C. Marinas V. Marinozzi S. Mariotto C. Marquis J. Martelain G. Martelli A. Martens I. Martin-Melero V.I. Martinez Outschoorn F. Martinez C.M. Jardim L. Marzola S. Masciocchi A. Mashal A. Masi I. Masina P. Mastrapasqua V. Mateu S. Mattiazzo M. Maugis D. Mauree G.H.I. Maury-Cuna A. Mayoux E. Mazzeo S. Mazzoni M. Meena E. Meftah Andrew Mehta Ankita Mehta B. Mele R. Mena-Andrade M. Mentink D. Mergelkuhl V. Mertinger L. Mether S. Meylan T. Michel T. Michlmayr M. Migliorati A. Milanese C. Milardi G. Milhano M. Minty C. Mirabelli T. Miralles L. Miralles Verge D. Mirarchi K. Mirbaghestan N. Mirian V.A. Mitsou D.S. Mitzel M. Mlynarikova S. Möbius M. Mohammadi Najafabadi G.B. Mohanty R. N. Mohapatra S. Moneta E. Monnier S. Monteil I. León Monzón F. Moortgat N. Morange M. Moretti S. Moretti T. Mori I. Morozov A. Morozzi M. Morrone A. Moscariello F. Moscatelli I. Moulin N. Mounet A. Mueller A.-S. Müller B.O. Müller J. Mundet E. Musa V. Musat R. Musenich E. Musumeci M. Mylona V.V. Mytrochenko B. Nachman S. Nagaitsev T. Nakamoto M. Napsuciale M. Nardecchia G. Nardini G. Narváez-Arango S. Naseem A. Natochii A. Navascues Cornago B. Naydenov G. Nergiz A.V. Nesterenko C. Neubüser H.B. Newman F. Niccoli O. Nicrosini U. Niedermayer G. Niehues J. Nielsen G. Nigrelli S. Nikitin I.B. Nikolaev A. Nisati N. Nitika J.M. No M. Nonis Y. Nosochkov A. Novokhatski J.M. O'Callaghan S.A. Ochoa-Oregon K. Ohmi K. Oide V.A. Okorokov C. Oleari D. Oliveira Damazio Y. Onel A. Onofre P. Osland Y.M. Oviedo-Torres A. Ozansoy F. Ozaydin K. Ozdemir A. Ozturk M.A. Pérez de León S. Pacetti H. Pacey J. Paciello C.E. Pagliarone A. Paillex H.F. Pais da Silva A. Pampaloni C. Pancotti M. Pandurović O. Panella G. Panizzo C. Pantouvakis L. Panwar P. Paolucci Y. Papa A. Papaefstathiou Y. Papaphilippou A. Paramonov A. Pareti B. Parker V. Parma F. Parodi M. Parodi B. Paroli J.A. Parsons D. Passarelli D. Passeri B. Pattnaik A. Patwa C. Paus F. Pauss F. Peauger I. Pedraza R. Pedro J. Pekkanen G. Peon A. 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Van Goethem P. van Hees U. van Rienen L. van Riesen-Haupt P. Van Trappen M. Vande Voorde A.L. Vanel E.W. Varnes J.-L. Vay F. Veit I. Veliscek R. Veness A. Ventura M. Verducci C.B. Verhaaren C. Vernieri A.P. Verweij J.-F. Vian A. Vicini N. Vignaroli S. Vignetti M.C. Villeneuve I. Vivarelli E. Voevodina D.M. Vogt B. Voirin S. Voiriot J. Voiron P. Vojtyla V. Völkl L. von Freeden Z. Vostrel N. Voumard E. Vryonidou V. Vysotsky R. Wallny L.-T. Wang Y. Wang R. Wanzenberg B.F.L. Ward N. Wardle Z. Wa̧s L. Watrelot A.T. Watson M.F. Watson M.S. Weber C.P. Welsch M. Wendt J. Wenninger B. Weyer G. White S. White B. Wicki M. Widorski U.A. Wiedemann A.R. Wiederhold A . Wiedl H.-U. Wienands A. Wieser C. Wiesner H. Wilkens D. Willi P.H. Williams S.L. Williams A. Winter R.B. Wittwer D. Wollmann Y. Wu Z. Wu J. Xiao K. Xie S. Xie M. Yalvac F. Yaman W.-M. Yao M. Yeresko A. Yilmaz H.D. Yoo T. You F. Yu S.S. Yu T.-T. Yu S. Yue A. Zaborowska M. Zahnd C. Zamantzas G. Zanderighi C. Zannini R. Zanzottera P. Zaro R. Zennaro M. Zerlauth H. Zhang J. Zhang Y. Zhang Z. Zhang Y. Zhao Y.-M. Zhong B. Zhou D. Zhou J. Zhu G. Zick M.A. Zielinski E. Zimmermann A. Zingaretti J. Zinn-Justin A.V. Zlobin M. Zobov F. Zomer S. Zorzetti X. Zuo J. Zurita V.V. Zutshi M. Zykova
This is my paper · ORCID
classification physics.acc-phhep-exhep-ph
keywords FutureCircularCollidercivilengineeringtunnelfeasibilitymolassegeologysubsurfacesiteinvestigationavoid-reduce-compensatebenefit-costanalysisexcavatedmaterialmanagement
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This volume of the FCC Feasibility Study argues that the proposed collider's underground civil engineering is technically feasible: a 90.6 km accelerator tunnel, twelve permanent shafts, large-span caverns, and eight surface sites can be built with existing, proven construction methods. The design was iterated through an 'avoid-reduce-compensate' process that keeps the tunnel mostly in watertight molasse rock and limits the unavoidable limestone crossing to about 4.4 km. The report also claims that the reference scenario is economically viable, with a positive benefit-cost ratio for the FCC-ee stage even under conservative assumptions, and that environmental field investigations covering nearly 600 hectares support the technical and procedural feasibility. This is the engineering and territorial foundation on which the next particle-physics strategy decision will rest.

What carries the argument

The load-bearing mechanism is the iterative placement-optimization loop the report calls 'avoid-reduce-compensate': each candidate layout is tested against subsurface geology, surface territorial constraints, cost, and schedule, then revised to reduce impacts. The physical carrier is the 3D subsurface model of the Geneva basin, which keeps the tunnel predominantly in watertight molasse and limits unavoidable limestone crossing to about 4.4 km; the TBM drive pattern, with twin drives starting from four access points, and the 5.5 m internal diameter single-pass precast lining carry the construction-method claims.

What would settle it

Compare the processed phase-1 borehole logs and seismic sections against the 3D geological model: if the molasse-limestone interface under the Jura and Vuache sections is found shallower than modeled, or if karstic voids appear outside the predicted 4.4 km Mandallaz section, the feasibility claim is falsified.

Watch

Extended reading notes

Core claim

The central claim is that the civil engineering for the FCC-ee can be constructed using existing, proven techniques: a single 90.6 km accelerator tunnel at depths up to 560 m, twelve permanent shafts with the deepest at 400 m, detector caverns up to 66 m by 35 m by 35 m, plus service caverns, klystron galleries, alcoves, and bypass tunnels. The report states that the current design demonstrates technical feasibility, supported by consultations with tunnelling contractors, a TBM manufacturer, and a shaft-sinking specialist. It further claims a positive benefit-cost ratio for the FCC-ee under the most conservative and stringent conditions considered, and presents the 'avoid-reduce-compensate' iteration as the mechanism that balanced physics performance, territorial compatibility, risk, and cost.

Load-bearing premise

The baseline assumes the tunnel can be placed predominantly in watertight molasse rock, with only a 4.4 km limestone section; if the ongoing subsurface investigations find more karstic limestone, water-bearing moraine, or major faults than modeled, the alignment, construction method, cost, and schedule would all have to change.

Editorial extensions

If this is right

  • The 90.6 km tunnel, twelve permanent shafts, and eight surface sites can move into detailed design and costing on the stated baseline; no new excavation technology is required.
  • FCC-ee's positive benefit-cost ratio under conservative assumptions makes economic viability a defensible input to the next particle-physics strategy decision.
  • The staged civil engineering plan means larger FCC-hh detector caverns and beam-absorber tunnels can be deferred, with space reserved, avoiding costly demolition and re-excavation later.
  • Excavated molasse can be treated as a regional resource rather than waste, but this depends on cross-border agreements between the two host states on spoil sharing and transport.
  • The ongoing subsurface investigation campaign will confirm or refine the assumed 4.4 km limestone crossing, directly affecting cost and schedule confidence.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • A testable extension: if the phase-1 boreholes' preliminary indication that the Mandallaz limestone is narrower than modeled holds, the high-risk 4.4 km section and its schedule contingency could shrink, lowering cost; the report stops short of claiming this.
  • The public release of borehole logs and the 3D geological model will let outside engineers independently pressure-test the feasibility claim, since that model underpins the cost and schedule estimates.
  • The 'avoid-reduce-compensate' loop is transferable to other deep-infrastructure projects: the dominant cost lever is not the excavation machines but placing the tunnel in watertight geology, which is precisely what the loop formalizes.
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Signed reviews

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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

3 major / 3 minor

Summary. This volume of the FCC Feasibility Study Report presents the civil-engineering baseline, territorial implementation, environmental studies, and sustainability assessment for the proposed Future Circular Collider. It describes a 90.6 km accelerator tunnel with an internal diameter of 5.5 m, twelve permanent shafts, eight surface sites, TBM-based excavation predominantly in molasse rock, a 4.4 km limestone section at Mandallaz, a staged construction approach, management of about 6.3 million cubic metres of excavated material, and a socio-economic evaluation that claims a positive benefit-cost ratio for the FCC-ee stage under conservative assumptions. The report states that the current design demonstrates technical feasibility, while explicitly noting that phase 1 of the subsurface site investigations is only about 40% complete and that the 3D geological model still has areas with little or no data.

Significance. If the central feasibility claim holds, this document is a major milestone for the European Strategy update: it provides a costed, schedule-aware, testable baseline for a 90 km-class tunnel, with credible anchoring in external benchmarks (LEP and LHC experience, tunnelling-contractor consultations, the UK Halite project) and a detailed Product Breakdown Structure down to level 4. The report is commendably transparent about its main uncertainties, particularly the geological model and the ongoing site-investigation campaign, and it commits to making the updated 3D geological model and borehole logs publicly available. The explicit staging logic for underground and surface structures and the excavated-material strategy are further strengths that make the study amenable to external scrutiny and future validation.

major comments (3)
  1. [§1.1, §1.4, §1.4.2] The central claim that the civil-engineering design is technically feasible is load-bearing but is not yet fully supported because it rests on the assumption that the tunnel lies predominantly in watertight molasse with only 4.4 km of limestone. Section 1.4.2 admits that certain locations, such as the foot of the Bornes and Mandallaz outcrops, extend several kilometres without relevant geological data at the depths of the proposed infrastructure, and Section 1.4 states that phase 1 of the subsurface investigations is only about 40% complete. The report's own caveats—that further work is needed to reduce technical risks and that the molasse assumption should be confirmed with the completion of the ongoing site investigations—indicate that the feasibility demonstration is provisional. Because the TBM selection, advance rates, shaft construction methods, cost, and schedule all depend on the geological model, the feasibility claim should be explicitly conditional on the outcome of the campaign, or it should be accompanied by a quantitative sensitivity analysis showing how the conclusion would change if, for example, the karstic limestone or water-bearing moraine sections were longer than currently modelled.
  2. [§1.1.1, Table 1.2, §1.1.10] The assumed TBM advance rates (16 m/day average, reduced to 9 m/day in the Mandallaz limestone) and the choice of single-shield TBM are load-bearing parameters for the construction schedule and cost. The report does not provide a derivation of these values beyond citing the UK Halite project's 20 m/day, and it itself describes the Moutier tunnel case where a single-shield TBM became stuck after 190 m owing to unforeseen geology. To make the feasibility argument robust, the authors should either provide a quantitative sensitivity analysis around the advance-rate and machine-selection assumptions, or explicitly state that the feasibility conclusion is contingent on the ground conditions being confirmed by the phase 1 and phase 2 investigations and on the ability to switch to earth-pressure-balance or slurry TBMs and ground treatment if needed.
  3. [Abstract, §4.5] The abstract and Section 4.5 claim a positive benefit-cost ratio for the FCC-ee even under the most conservative and stringent conditions. This economic claim inherits the geological uncertainty because the cost and schedule inputs come from the civil-engineering baseline described in Chapter 1. If the benefit-cost analysis does not include a scenario with adverse geological outcomes—such as longer karstic limestone requiring ground treatment, additional water-bearing moraine crossings, or TBM delays—the label 'most conservative' is not supported. The manuscript should state explicitly which scenarios were included in the sensitivity analysis, or it should add such a scenario to demonstrate that the positive benefit-cost ratio persists when the geological assumptions are relaxed.
minor comments (3)
  1. [§1.1.9] In the description of the TBM drives, the sentence 'Therefore, the quantity of material extracted from PD is around 1.3 million m3' should refer to site PJ; the site label appears to be a typo.
  2. [§1.2.8] The sentence ending '...to ensure the aquifer is protected. . A simplified layout' contains a doubled period before the next sentence; please correct the punctuation.
  3. [§1.4.3] The introductory list of phase 1 investigation sections names the Rhône last, but the subsections present the Rhône after Vuache; reorder the list or the subsections for consistency.

Circularity Check

0 steps flagged · score 0.0 of 10

No circularity found: the feasibility claims are grounded in external benchmarks, third-party geological data, and independent contractor consultations, not in self-referential derivation.

full rationale

The report is an engineering feasibility study whose central claims are validated against external evidence: CERN's LEP and LHC construction experience, consultations with tunneling contractors and a European TBM manufacturer, a specialist shaft-sinking assessment, geophysical and borehole data from third parties such as the Canton de Genève GEothermies program, and collaboration with the University of Geneva on the 3D geological model. The statement that 'the current design demonstrates the technical feasibility of FCC civil engineering' is supported by these external inputs and by ongoing subsurface investigations, not by an equation that reduces to its own assumptions. The report explicitly identifies its own limitations, noting that phase 1 subsurface investigations are only about 40% complete and that 'there are still areas where further work needs to be done in order to reduce technical risks,' which is honest uncertainty rather than circularity. The socio-economic benefit-cost claim is presented as a result of a 'comprehensive socio-economic impact assessment' under 'the most conservative and stringent conditions,' and while the detailed cost-benefit model is not fully reproduced in the reviewed sections, nothing in the text indicates that the conclusion is defined into existence by the inputs. No fitted parameter is relabeled as a prediction, no uniqueness theorem is imported from self-citation, and no scientific derivation is shown to be equivalent to its inputs. Therefore the appropriate finding is no significant circularity.

Assumptions & free parameters 2 free parameters · 3 assumptions · 0 invented entities

The central feasibility claim rests mainly on geological and scheduling assumptions. No new physical entities are introduced. The free parameters listed are engineering planning choices, not fitted to outcome data.

free parameters (2)
  • TBM advance rate = 16 m/day nominal, 9 m/day in limestone
    Chosen for scheduling and cost estimates. The report reduces the rate in the Mandallaz limestone section to account for difficult ground.
  • Excavation expansion factor = 1.3
    Used to convert in-situ excavated volume to bulked volume for material management and transport planning.
assumptions (3)
  • domain assumption The geology along the alignment consists primarily of molasse, with limited limestone and moraine layers.
    The tunnel depth and alignment were chosen to remain in molasse, which is assumed to be watertight and TBM-friendly (Section 1.1, Section 1.4.1). If this assumption fails, feasibility and cost change.
  • domain assumption Existing conventional tunneling and shaft-sinking techniques are sufficient for depths up to 560 m and shafts to 400 m.
    The report argues this based on CERN's LEP/LHC experience and contractor feedback, but it is a load-bearing premise for the feasibility claim.
  • domain assumption The staged construction of FCC-ee first, with FCC-hh later, is implementable.
    Staging is assumed to avoid unnecessary cost while preserving space for future FCC-hh structures, as detailed in Section 1.3.

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Cite this review

Pith. "Pith review of Future Circular Collider Feasibility Study Report: Volume 3, Civil Engineering, Implementation and Sustainability." pith.science (2026). https://pith.science/paper/EMVQBRFA

@misc{pith2026250500273,
  author       = {Pith},
  title        = {Pith review of: Future Circular Collider Feasibility Study Report: Volume 3, Civil Engineering, Implementation and Sustainability},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/EMVQBRFA}},
  note         = {Machine review of arXiv:2505.00273}
}
read the original abstract

Volume 3 of the FCC Feasibility Report presents studies related to civil engineering, the development of a project implementation scenario, and environmental and sustainability aspects. The report details the iterative improvements made to the civil engineering concepts since 2018, taking into account subsurface conditions, accelerator and experiment requirements, and territorial considerations. It outlines a technically feasible and economically viable civil engineering configuration that serves as the baseline for detailed subsurface investigations, construction design, cost estimation, and project implementation planning. Additionally, the report highlights ongoing subsurface investigations in key areas to support the development of an improved 3D subsurface model of the region. The report describes development of the project scenario based on the 'avoid-reduce-compensate' iterative optimisation approach. The reference scenario balances optimal physics performance with territorial compatibility, implementation risks, and costs. Environmental field investigations covering almost 600 hectares of terrain - including numerous urban, economic, social, and technical aspects - confirmed the project's technical feasibility and contributed to the preparation of essential input documents for the formal project authorisation phase. The summary also highlights the initiation of public dialogue as part of the authorisation process. The results of a comprehensive socio-economic impact assessment, which included significant environmental effects, are presented. Even under the most conservative and stringent conditions, a positive benefit-cost ratio for the FCC-ee is obtained. Finally, the report provides a concise summary of the studies conducted to document the current state of the environment.

Figures

Figures reproduced from arXiv: 2505.00273 by the authors.

Figure 1.1
Figure 1.1. Schematic layout of FCC-ee underground civil engineering. [PITH_FULL_IMAGE:figures/full_fig_p027_1_1.png] view at source ↗
Figure 1.2
Figure 1.2. Accelerator tunnel cross-section. The accelerator tunnel houses the beam and service infrastructure, as well as a transport corridor. The current design of the tunnel assumes that where tunnel boring machines (TBMs) are used for exca￾vation, a precast reinforced concrete segmental lining will be used to support the tunnel. In areas where TBMs will not be employed, primary support consisting of rock bolts and fibre-r… view at source ↗
Figure 1.3
Figure 1.3. Single shield TBM. Source: Herrenknecht A typical benefit of a double shield TBM over a single shield is the increased speed of construction, this is because the machine can simultaneously excavate the ground and install the segmental tunnel lining. Conversely, a single-shield machine requires these two phases to occur sequentially. A double￾shield machine is also better suited and more adaptable to variable geology… view at source ↗
Figures from the paper (195 more)
Figure 1.4
Figure 1.4. Figure 1.4: Proposed arrangement of TBM drives. CERN commissioned a study into the safety, ventilation, and logistics aspects of the FCC con￾struction to address concerns that the 5.5 m internal diameter tunnel and 11 km TBM drives would present significant safety and logistical…
Figure 1.5
Figure 1.5. Figure 1.5: Cross-section of the accelerator tunnel during construction. Credit: Amberg [PITH_FULL_IMAGE:figures/full_fig_p033_1_5.png]
Figure 1.6
Figure 1.6. Figure 1.6: Example refuge chamber placed at the back of the TBM. Credit: mineARC [PITH_FULL_IMAGE:figures/full_fig_p033_1_6.png]
Figure 1.7
Figure 1.7. Figure 1.7: Plan view of the typical tunnel widening at an experiment cavern. [PITH_FULL_IMAGE:figures/full_fig_p034_1_7.png]
Figure 1.8
Figure 1.8. Figure 1.8: Plan view of PA showing the layout of connection tunnels between the service cavern and [PITH_FULL_IMAGE:figures/full_fig_p034_1_8.png]
Figure 1.9
Figure 1.9. Figure 1.9: Cross-section through the 12 m diameter service shaft, as proposed at the four technical areas. [PITH_FULL_IMAGE:figures/full_fig_p035_1_9.png]
Figure 1.10
Figure 1.10. Figure 1.10: Plan view of the sub-surface arrangement at PF, showing the offset service shaft and access [PITH_FULL_IMAGE:figures/full_fig_p037_1_10.png]
Figure 1.11
Figure 1.11. Figure 1.11: Cross-section of the 12 m diameter service shaft with diaphragm wall construction. [PITH_FULL_IMAGE:figures/full_fig_p038_1_11.png]
Figure 1.12
Figure 1.12. Figure 1.12: Cross-section through the 3D model at PA, showing the service cavern (left) and experiment [PITH_FULL_IMAGE:figures/full_fig_p038_1_12.png]
Figure 1.13
Figure 1.13. Figure 1.13: 3D model view of the klystron gallery arrangement at PH. [PITH_FULL_IMAGE:figures/full_fig_p039_1_13.png]
Figure 1.14
Figure 1.14. Figure 1.14: Cross-section through the klystron gallery and accelerator tunnel, including wave-guide duct [PITH_FULL_IMAGE:figures/full_fig_p040_1_14.png]
Figure 1.15
Figure 1.15. Figure 1.15: Layout of alcoves around the FCC ring. In addition to the regular alcoves, twelve ‘large’alcoves are needed on either side of each of the FCC access points to provide extra space for electrical equipment. These larger alcoves are 29 m in length, 18 m in width and 8.…
Figure 1.16
Figure 1.16. Figure 1.16: Model view of a large alcove and transport passing bay. [PITH_FULL_IMAGE:figures/full_fig_p042_1_16.png]
Figure 1.17
Figure 1.17. Figure 1.17: Example of a regular alcove and large passing bay located at the centre of each arc sector. [PITH_FULL_IMAGE:figures/full_fig_p042_1_17.png]
Figure 1.18
Figure 1.18. Figure 1.18: Sub-surface structural layout at PB, service cavern (left) and beam absorber cavern (right). [PITH_FULL_IMAGE:figures/full_fig_p044_1_18.png]
Figure 1.19
Figure 1.19. Figure 1.19: Geographical map of Switzerland. Credit: Philippos Garefalakis, F. S. (2019). Tectonic [PITH_FULL_IMAGE:figures/full_fig_p046_1_19.png]
Figure 1.20
Figure 1.20. Figure 1.20: Options for experiment and service shaft locations relative to the interaction point. [PITH_FULL_IMAGE:figures/full_fig_p047_1_20.png]
Figure 1.21
Figure 1.21. Figure 1.21: Preliminary simplified surface requirements for PA site. [PITH_FULL_IMAGE:figures/full_fig_p050_1_21.png]
Figure 1.22
Figure 1.22. Figure 1.22: Preliminary cross-sectional diagram of PA site. [PITH_FULL_IMAGE:figures/full_fig_p050_1_22.png]
Figure 1.23
Figure 1.23. Figure 1.23: Preliminary simplified area requirements for PB surface site. [PITH_FULL_IMAGE:figures/full_fig_p052_1_23.png]
Figure 1.24
Figure 1.24. Figure 1.24: Preliminary simplified cross-section of PB surface site. [PITH_FULL_IMAGE:figures/full_fig_p053_1_24.png]
Figure 1.25
Figure 1.25. Figure 1.25: Preliminary simplified area requirements for PD surface site. [PITH_FULL_IMAGE:figures/full_fig_p054_1_25.png]
Figure 1.26
Figure 1.26. Figure 1.26: Preliminary simplified cross-section of PD surface site. [PITH_FULL_IMAGE:figures/full_fig_p054_1_26.png]
Figure 1.27
Figure 1.27. Figure 1.27: Preliminary simplified area requirements for PF surface site. [PITH_FULL_IMAGE:figures/full_fig_p055_1_27.png]
Figure 1.28
Figure 1.28. Figure 1.28: Preliminary simplified cross-section of PF surface site. [PITH_FULL_IMAGE:figures/full_fig_p055_1_28.png]
Figure 1.29
Figure 1.29. Figure 1.29: Preliminary simplified area requirements for PG surface site. [PITH_FULL_IMAGE:figures/full_fig_p056_1_29.png]
Figure 1.30
Figure 1.30. Figure 1.30: Preliminary simplified cross-section of PG surface site. [PITH_FULL_IMAGE:figures/full_fig_p057_1_30.png]
Figure 1.31
Figure 1.31. Figure 1.31: Preliminary simplified area requirements for PH surface site. [PITH_FULL_IMAGE:figures/full_fig_p058_1_31.png]
Figure 1.32
Figure 1.32. Figure 1.32: Preliminary simplified cross-section of PH surface site. [PITH_FULL_IMAGE:figures/full_fig_p058_1_32.png]
Figure 1.33
Figure 1.33. Figure 1.33: Preliminary simplified area requirements for surface site PJ. [PITH_FULL_IMAGE:figures/full_fig_p059_1_33.png]
Figure 1.34
Figure 1.34. Figure 1.34: Preliminary simplified cross-section of site PJ. [PITH_FULL_IMAGE:figures/full_fig_p059_1_34.png]
Figure 1.35
Figure 1.35. Figure 1.35: Preliminary simplified area requirements for surface site PL. [PITH_FULL_IMAGE:figures/full_fig_p060_1_35.png]
Figure 1.36
Figure 1.36. Figure 1.36: Preliminary simplified cross-section through site PL. [PITH_FULL_IMAGE:figures/full_fig_p060_1_36.png]
Figure 1.37
Figure 1.37. Figure 1.37: Geology of the Geneva area. exists for the Arve and Rhône Valleys, but soft deposits, including alluvial and alluvial-glacial moraines, are expected to reach depths of up to 100 metres. To mitigate construction risks and reduce water inflow challenges, the tunnel al…
Figure 1.38
Figure 1.38. Figure 1.38: FCC long geological profile. 1.4.2 Development of geological 3D model Within the feasibility study, one of the primary objectives was to identify and locate the interfaces be￾tween the moraines and the molasse, and between the molasse and the limestone more precisel…
Figure 1.39
Figure 1.39. Figure 1.39: Areas of geological uncertainty. Jura 1 Section Jura 1 is situated at the base of the predominantly limestone Jura mountain range, extending for approximately eight kilometres from Challex in France in the south to Satigny near CERN in Switzerland in the north. The …
Figure 1.40
Figure 1.40. Figure 1.40: Jura 1 section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p067_1_40.png]
Figure 1.41
Figure 1.41. Figure 1.41: Jura 2 section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p068_1_41.png]
Figure 1.42
Figure 1.42. Figure 1.42: Lake section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p069_1_42.png]
Figure 1.43
Figure 1.43. Figure 1.43: Arve section showing the location of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p070_1_43.png]
Figure 1.44
Figure 1.44. Figure 1.44: Bornes section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p071_1_44.png]
Figure 1.45
Figure 1.45. Figure 1.45: Mandallaz section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p072_1_45.png]
Figure 1.46
Figure 1.46. Figure 1.46: Usses section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p073_1_46.png]
Figure 1.47
Figure 1.47. Figure 1.47: Vuache section showing the locations of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p074_1_47.png]
Figure 1.48
Figure 1.48. Figure 1.48: Rhône section showing the location of the investigations. [PITH_FULL_IMAGE:figures/full_fig_p075_1_48.png]
Figure 1.49
Figure 1.49. Figure 1.49: Example of targeted borehole investigations for experiment cavern complexes. [PITH_FULL_IMAGE:figures/full_fig_p076_1_49.png]
Figure 1.50
Figure 1.50. Figure 1.50: Fault map of FCC study area. 1.4.6 Summary of the Subsurface Site Investigations The subsurface site investigations that have already been carried out as part of Phase One have improved the reliability of the 3D geological model for the proposed FCC tunnel. The prel…
Figure 1.51
Figure 1.51. Figure 1.51: FCC long profile with potential faults. 1.5 Management of excavated materials 1.5.1 Introduction Building the underground infrastructures of the Future Circular Collider (FCC) in the Franco-Geneva Basin would produce approximately 6.3 million cubic metres of excavat…
Figure 1.52
Figure 1.52. Figure 1.52: Geological profile along the FCC path. The part of the tunnel under French territory is shown [PITH_FULL_IMAGE:figures/full_fig_p079_1_52.png]
Figure 1.53
Figure 1.53. Figure 1.53: Schematic diagram of the scenarios defined for the excavated material strategy. (not including [PITH_FULL_IMAGE:figures/full_fig_p082_1_53.png]
Figure 1.54
Figure 1.54. Figure 1.54: Schematic diagram of the inventory of the regional opportunities for material reuse (status [PITH_FULL_IMAGE:figures/full_fig_p088_1_54.png]
Figure 1.55
Figure 1.55. Figure 1.55: Study of the potential locations for railway sidings. [PITH_FULL_IMAGE:figures/full_fig_p089_1_55.png]
Figure 1.56
Figure 1.56. Figure 1.56: Example of possible distribution of unpolluted excavation materials to the quarries nearest to the material extraction sites (the figures in black are the value in tonnes). The colours of the circles link a given extraction site to one or more quarries or backfillin…
Figure 2.1
Figure 2.1. Figure 2.1: The "avoid-reduce-compensate" approach, known as "Éviter-réduire-compenser (ERC) in [PITH_FULL_IMAGE:figures/full_fig_p095_2_1.png]
Figure 2.2
Figure 2.2. Figure 2.2: The Plan-Do-Check-Act approach for environmental management, defined in standard NF EN [PITH_FULL_IMAGE:figures/full_fig_p096_2_2.png]
Figure 2.3
Figure 2.3. Figure 2.3: Diagram from iterative impact study, French Ministry of Territorial Development and the En [PITH_FULL_IMAGE:figures/full_fig_p096_2_3.png]
Figure 2.4
Figure 2.4. Figure 2.4: As the layout and placement studies progress, additional information and stakeholders are [PITH_FULL_IMAGE:figures/full_fig_p098_2_4.png]
Figure 2.5
Figure 2.5. Figure 2.5: Example of a summary view of the multi-criteria analysis of an scenario (PA0-0.1). The scenario [PITH_FULL_IMAGE:figures/full_fig_p102_2_5.png]
Figure 2.6
Figure 2.6. Figure 2.6: : Summary of the multi-criteria analysis of reference scenario PA31-4.0. [PITH_FULL_IMAGE:figures/full_fig_p102_2_6.png]
Figure 2.7
Figure 2.7. Figure 2.7: : Around one hundred different layout scenarios were studied and individually analysed. [PITH_FULL_IMAGE:figures/full_fig_p103_2_7.png]
Figure 2.8
Figure 2.8. Figure 2.8: Multi-criteria analysis based ranking of the most promising implementation scenarios in 2022 [PITH_FULL_IMAGE:figures/full_fig_p104_2_8.png]
Figure 2.9
Figure 2.9. Figure 2.9: Two different collider layouts. The image on the left shows a configuration comprising twelve [PITH_FULL_IMAGE:figures/full_fig_p105_2_9.png]
Figure 2.10
Figure 2.10. Figure 2.10: CERN powered heat network under construction in Ferney-Voltaire, France. [PITH_FULL_IMAGE:figures/full_fig_p112_2_10.png]
Figure 2.11
Figure 2.11. Figure 2.11: : Zones in the scenario development perimeter classified as to be avoided (‘red’). Note that [PITH_FULL_IMAGE:figures/full_fig_p114_2_11.png]
Figure 2.12
Figure 2.12. Figure 2.12: : Zones in the scenario development perimeter classified as to be avoided (‘red’) and with high [PITH_FULL_IMAGE:figures/full_fig_p115_2_12.png]
Figure 2.13
Figure 2.13. Figure 2.13: : Examples of regional changes. Left: 17 ha of new exclusion zones in Ferney-Voltaire (Ain, [PITH_FULL_IMAGE:figures/full_fig_p116_2_13.png]
Figure 2.14
Figure 2.14. Figure 2.14: : After several years of analysing the subsurface conditions based on bibliographic data and [PITH_FULL_IMAGE:figures/full_fig_p118_2_14.png]
Figure 2.15
Figure 2.15. Figure 2.15: : Example images from the 3D model (here molasse and cretaceous formations) used to [PITH_FULL_IMAGE:figures/full_fig_p119_2_15.png]
Figure 2.16
Figure 2.16. Figure 2.16: : Topography of the area. Red and orange colours indicate steep slopes. [PITH_FULL_IMAGE:figures/full_fig_p120_2_16.png]
Figure 2.17
Figure 2.17. Figure 2.17: : Relief of the area. White and red colours indicate high elevations. [PITH_FULL_IMAGE:figures/full_fig_p121_2_17.png]
Figure 2.18
Figure 2.18. Figure 2.18: Bathymetry of the Geneva lake. 2.5 Initial variants 2.5.1 Introduction This section provides the background which explains how the implementation scenario in the Franco￾Swiss border region was developed. It explains why alternative scenarios to the west of the Jura …
Figure 2.19
Figure 2.19. Figure 2.19: : Combination of subsurface and topographic constraints that lead to a ca. 300 m wide scenario [PITH_FULL_IMAGE:figures/full_fig_p122_2_19.png]
Figure 2.20
Figure 2.20. Figure 2.20: Comparison of land areas and protection zones to the west and east of the Jura chain. [PITH_FULL_IMAGE:figures/full_fig_p123_2_20.png]
Figure 2.21
Figure 2.21. Figure 2.21: Racetrack layout scenario with two 11 km long straight sections, leading to a total circumfer [PITH_FULL_IMAGE:figures/full_fig_p124_2_21.png]
Figure 2.22
Figure 2.22. Figure 2.22: Placement option for a 90 km circular / 11 km linear racetrack scenario. [PITH_FULL_IMAGE:figures/full_fig_p125_2_22.png]
Figure 2.23
Figure 2.23. Figure 2.23: Example racetrack alignment scenario. in fully protected lake border areas with absolute bans for subsurface activities and in highly urbanised locations. Locations for site PB in Switzerland are in a large nature preservation zone, in particular the home for amphib…
Figure 2.24
Figure 2.24. Figure 2.24: Example of the racetrack layout placement with the environmental constraints indicated. Site [PITH_FULL_IMAGE:figures/full_fig_p126_2_24.png]
Figure 2.25
Figure 2.25. Figure 2.25: : Established study perimeter (red line). Exclusion zones and zones with too many difficulties [PITH_FULL_IMAGE:figures/full_fig_p127_2_25.png]
Figure 2.26
Figure 2.26. Figure 2.26: The PA31-4.0 reference scenario that served as baseline for the subsurface investigations, the [PITH_FULL_IMAGE:figures/full_fig_p128_2_26.png]
Figure 2.27
Figure 2.27. Figure 2.27: The functions of the various sites in the PA31-4.0 scenario configuration. [PITH_FULL_IMAGE:figures/full_fig_p129_2_27.png]
Figure 2.28
Figure 2.28. Figure 2.28: Multi-criteria analysis percentage scores of each surface site location and the entire collider [PITH_FULL_IMAGE:figures/full_fig_p132_2_28.png]
Figure 2.29
Figure 2.29. Figure 2.29: Aerial view of candidate location for surface site PA. Synergies and territorial potentials Waste heat from the particle collider cooling and the data centre can be recovered and supplied to the homes and business parks around the site, including the Geneva airport …
Figure 2.30
Figure 2.30. Figure 2.30: PA surface site location in Ferney-Voltaire, Ain, France. The hashed space in the south [PITH_FULL_IMAGE:figures/full_fig_p134_2_30.png]
Figure 2.31
Figure 2.31. Figure 2.31: Aerial view of candidate location for surface site PB. Synergies and territorial potentials According to the road access study carried out by the firm, direct access to the site from the Route de Jussy is technically feasible and preferable from the project perspect…
Figure 2.32
Figure 2.32. Figure 2.32: PB surface site location in Presinge, canton of Geneva, Switzerland. [PITH_FULL_IMAGE:figures/full_fig_p136_2_32.png]
Figure 2.33
Figure 2.33. Figure 2.33: Aerial view of candidate location for surface site PD. autoroute during the construction phase has been studied. It would facilitate the removal and possibly also the supply of materials, thus largely avoiding the need for trucks. There are likely areas in the vicin…
Figure 2.34
Figure 2.34. Figure 2.34: PD surface site location in Nangy, Haute-Savoie, France. [PITH_FULL_IMAGE:figures/full_fig_p138_2_34.png]
Figure 2.35
Figure 2.35. Figure 2.35: Aerial view of candidate location for surface site PF. Option of an annex in La Roche-sur-Foron: The technical site is located on the site of an inert waste storage facility (in France: ‘I.S.D.I.’), cur￾rently under construction, with the status of a facility classi…
Figure 2.36
Figure 2.36. Figure 2.36: Nominal location of PF indicated with a spot on the collider trace. Two surface site candidate [PITH_FULL_IMAGE:figures/full_fig_p140_2_36.png]
Figure 2.37
Figure 2.37. Figure 2.37: PF surface site location in Éteaux, Haute-Savoie, France. [PITH_FULL_IMAGE:figures/full_fig_p140_2_37.png]
Figure 2.38
Figure 2.38. Figure 2.38: Aerial view of candidate location for surface site PG. The experiment site PG lies to the north of the Route d’Annecy road on a plateau, crossing the border of the communes Charvonnex and Groisy, Haute-Savoie in France (see [PITH_FULL_IMAGE:figures/full_fig_p141_2_…
Figure 2.39
Figure 2.39. Figure 2.39: PG surface site location in Charvonnex and Groisy, Haute-Savoie, France. the main site [PITH_FULL_IMAGE:figures/full_fig_p142_2_39.png]
Figure 2.40
Figure 2.40. Figure 2.40: Aerial view of candidate location for surface site PH. The technical site PH is located right along the D203 road in Cercier, Haute-Savoie in France (see [PITH_FULL_IMAGE:figures/full_fig_p143_2_40.png]
Figure 2.41
Figure 2.41. Figure 2.41: PH surface site location in Cercier and Marlioz, Haute-Savoie, France. [PITH_FULL_IMAGE:figures/full_fig_p144_2_41.png]
Figure 2.42
Figure 2.42. Figure 2.42: Aerial view of candidate location for surface site PJ. 2.6.11 Site PJ Description of the site location The experiment site PJ is located in a field on a slope to the north of the A40 autoroute and to the west of the Valleiry autoroute area, at the junction of the Ch…
Figure 2.43
Figure 2.43. Figure 2.43: PJ surface site location in Dingy-en-Vuache and Vulbens, Haute-Savoie, France. [PITH_FULL_IMAGE:figures/full_fig_p146_2_43.png]
Figure 2.44
Figure 2.44. Figure 2.44: Aerial view of candidate location for surface site PL. existing environmental constraints. The area of the site is 5.5 ha. A large part of this space is foreseen for rewilding. Should for any reason the implementation at the nominal point turn out to be unfeasible, …
Figure 2.45
Figure 2.45. Figure 2.45: PL surface site options studies in Challex, Ain, France. [PITH_FULL_IMAGE:figures/full_fig_p148_2_45.png]
Figure 2.46
Figure 2.46. Figure 2.46: Alternative location for site PL in Challex, Ain, France. The plot is located on the outside of [PITH_FULL_IMAGE:figures/full_fig_p148_2_46.png]
Figure 2.47
Figure 2.47. Figure 2.47: Access to the main tunnel from the exterior via an underground connection. This approach is [PITH_FULL_IMAGE:figures/full_fig_p149_2_47.png]
Figure 2.49
Figure 2.49. Figure 2.49: Noteworthy road, electricity, water treatment infrastructures, emergency services and border [PITH_FULL_IMAGE:figures/full_fig_p154_2_49.png]
Figure 2.50
Figure 2.50. Figure 2.50: Overview of the road and railway transport network in the perimeter of the reference scenario. [PITH_FULL_IMAGE:figures/full_fig_p155_2_50.png]
Figure 2.51
Figure 2.51. Figure 2.51: Overview of road access concepts for each individual surface site. [PITH_FULL_IMAGE:figures/full_fig_p156_2_51.png]
Figure 2.52
Figure 2.52. Figure 2.52: Location of the autoroute connections, which were studied using existing service and rest [PITH_FULL_IMAGE:figures/full_fig_p158_2_52.png]
Figure 2.53
Figure 2.53. Figure 2.53: Minimum space requirements of a new railway access for goods transport. [PITH_FULL_IMAGE:figures/full_fig_p159_2_53.png]
Figure 19
Figure 19. Figure 19: Schéma explicatif du profil du tunnel de franchissement de lA41. and optional HH operation modes. Each configuration is characterised by different electrical [PITH_FULL_IMAGE:figures/full_fig_p161_19.png]
Figure 2.55
Figure 2.55. Figure 2.55: Annual electricity requirements of the collider and its technical infrastructure. The average [PITH_FULL_IMAGE:figures/full_fig_p163_2_55.png]
Figure 2.56
Figure 2.56. Figure 2.56: Existing or planned electricity grids in France and Switzerland within the FCC perime [PITH_FULL_IMAGE:figures/full_fig_p164_2_56.png]
Figure 2.57
Figure 2.57. Figure 2.57: Fire-fighting and emergency services in the perimeter of the reference scenario. [PITH_FULL_IMAGE:figures/full_fig_p168_2_57.png]
Figure 2.58
Figure 2.58. Figure 2.58: The OpenSkyLab field laboratory on 1 ha of land marked with a red line, next to the CERN [PITH_FULL_IMAGE:figures/full_fig_p170_2_58.png]
Figure 2.59
Figure 2.59. Figure 2.59: Capacities of quarries that could be re-filled in the vicinity of the project on French territory [PITH_FULL_IMAGE:figures/full_fig_p172_2_59.png]
Figure 2.60
Figure 2.60. Figure 2.60: Example scenario of construction workers per construction site and year. A specific personnel [PITH_FULL_IMAGE:figures/full_fig_p173_2_60.png]
Figure 2.61
Figure 2.61. Figure 2.61: Three examples of innovative projects designed by the company that was engaged in the [PITH_FULL_IMAGE:figures/full_fig_p175_2_61.png]
Figure 2.62
Figure 2.62. Figure 2.62: Examples of elements from the architectural toolkit conceived as a basis to further develop [PITH_FULL_IMAGE:figures/full_fig_p176_2_62.png]
Figure 2.63
Figure 2.63. Figure 2.63: The green roof created from the excavated materials of the construction site allows the building [PITH_FULL_IMAGE:figures/full_fig_p177_2_63.png]
Figure 2.64
Figure 2.64. Figure 2.64: Space requirements for a site and landscape integration of experiment site PA in Ferney [PITH_FULL_IMAGE:figures/full_fig_p178_2_64.png]
Figure 2.65
Figure 2.65. Figure 2.65: Space requirements for a site and landscape integration of experiment site PB in Presinge, [PITH_FULL_IMAGE:figures/full_fig_p179_2_65.png]
Figure 2.66
Figure 2.66. Figure 2.66: Space requirements for a site and landscape integration of experiment site PD in Nangy, [PITH_FULL_IMAGE:figures/full_fig_p180_2_66.png]
Figure 2.67
Figure 2.67. Figure 2.67: Space requirements for a site and landscape integration of technical site PF in Éteaux, France. [PITH_FULL_IMAGE:figures/full_fig_p181_2_67.png]
Figure 2.68
Figure 2.68. Figure 2.68: Space requirements for a site and landscape integration of experiment site PG in Charvonnex [PITH_FULL_IMAGE:figures/full_fig_p182_2_68.png]
Figure 2.69
Figure 2.69. Figure 2.69: Space requirements for a site integration of technical site PH in Cercier and Marlioz, France. [PITH_FULL_IMAGE:figures/full_fig_p183_2_69.png]
Figure 2.70
Figure 2.70. Figure 2.70: Space requirements for a site integration of experiment site PJ in Dingy-en-Vuache and Vul [PITH_FULL_IMAGE:figures/full_fig_p184_2_70.png]
Figure 2.71
Figure 2.71. Figure 2.71: Space requirements for a site integration of technical site PL in Challex, France. [PITH_FULL_IMAGE:figures/full_fig_p185_2_71.png]
Figure 2.72
Figure 2.72. Figure 2.72: A collection of some artist concepts that result from the application of the architecture toolkit [PITH_FULL_IMAGE:figures/full_fig_p186_2_72.png]
Figure 3.1
Figure 3.1. Figure 3.1: The environment refers to all elements that surround a project and their interactions with the [PITH_FULL_IMAGE:figures/full_fig_p188_3_1.png]
Figure 3.2
Figure 3.2. Figure 3.2: Environmental impacts are a consequence of the environmental sensitivity at a certain location [PITH_FULL_IMAGE:figures/full_fig_p189_3_2.png]
Figure 3.3
Figure 3.3. Figure 3.3: Evolutions of the carbon intensities of national grids in Europe. Source: RTE [ [PITH_FULL_IMAGE:figures/full_fig_p202_3_3.png]
Figure 3.4
Figure 3.4. Figure 3.4: Evolution of the levelized cost of electricity (LCOE, Source: Lazard’s Levelized Cost of Energy [PITH_FULL_IMAGE:figures/full_fig_p203_3_4.png]
Figure 3.5
Figure 3.5. Figure 3.5: Example of monthly electricity spot price in France between 2023 and 2024 (Source: Ember [PITH_FULL_IMAGE:figures/full_fig_p204_3_5.png]
Figure 3.6
Figure 3.6. Figure 3.6: Historic contract market prices of electricity from wind power in Europe in cents/kWh up to the [PITH_FULL_IMAGE:figures/full_fig_p204_3_6.png]
Figure 3.7
Figure 3.7. Figure 3.7: Stated electricity market price targets for 2030 published by the French government in the pluri [PITH_FULL_IMAGE:figures/full_fig_p205_3_7.png]
Figure 3.8
Figure 3.8. Figure 3.8: Weekly heat demand and supply for an example schedule of the Z operation mode. [PITH_FULL_IMAGE:figures/full_fig_p210_3_8.png]
Figure 3.9
Figure 3.9. Figure 3.9: Weekly heat demand and supply for an adapted schedule of the Z operation mode. [PITH_FULL_IMAGE:figures/full_fig_p211_3_9.png]
Figure 3.10
Figure 3.10. Figure 3.10: Example from the heat demand study at site PA in Ferney-Voltaire, within a perimeter of [PITH_FULL_IMAGE:figures/full_fig_p212_3_10.png]
Figure 3.11
Figure 3.11. Figure 3.11: Example from the heat demand study at site PD in Nangy, concerning a nearby hospital [PITH_FULL_IMAGE:figures/full_fig_p213_3_11.png]
Figure 3.12
Figure 3.12. Figure 3.12: Stages considered for the LCA of the infrastructure construction. [PITH_FULL_IMAGE:figures/full_fig_p214_3_12.png]
Figure 3.13
Figure 3.13. Figure 3.13: The construction-related carbon footprint per km of the FCC tunnel compared to typical public [PITH_FULL_IMAGE:figures/full_fig_p216_3_13.png]
Figure 3.14
Figure 3.14. Figure 3.14: Operation of the STEP in Scientrier throughout a typical year, matching with FCC Z mode [PITH_FULL_IMAGE:figures/full_fig_p220_3_14.png]
Figure 3.15
Figure 3.15. Figure 3.15: Capacities of different standard trucks used to analyse the construction site induced additional [PITH_FULL_IMAGE:figures/full_fig_p222_3_15.png]
Figure 3.16
Figure 3.16. Figure 3.16: Perimeters of the traffic studies for each construction site. The bolder lines indicate the traffic [PITH_FULL_IMAGE:figures/full_fig_p222_3_16.png]
Figure 3.17
Figure 3.17. Figure 3.17: Air quality measurements carried out using monitoring equipment to assess atmospheric pol [PITH_FULL_IMAGE:figures/full_fig_p225_3_17.png]
Figure 3.18
Figure 3.18. Figure 3.18: Air quality measurements conducted to assess atmospheric pollutants in the vicinity of the [PITH_FULL_IMAGE:figures/full_fig_p227_3_18.png]
Figure 3.19
Figure 3.19. Figure 3.19: Overview of surface and subsurface water bodies in the scenario perimeter. In this conceptual [PITH_FULL_IMAGE:figures/full_fig_p229_3_19.png]
Figure 3.20
Figure 3.20. Figure 3.20: Relief in the area of the FCC reference scenario. [PITH_FULL_IMAGE:figures/full_fig_p230_3_20.png]
Figure 3.21
Figure 3.21. Figure 3.21: Geological profile of the Geneva Basin, illustrating stratigraphic units, tectonic features, and [PITH_FULL_IMAGE:figures/full_fig_p231_3_21.png]
Figure 3.22
Figure 3.22. Figure 3.22: The auger boring method used to obtain soil samples from different depths. [PITH_FULL_IMAGE:figures/full_fig_p233_3_22.png]
Figure 3.23
Figure 3.23. Figure 3.23: Soil sample obtained by using auger boring method. [PITH_FULL_IMAGE:figures/full_fig_p234_3_23.png]
Figure 3.24
Figure 3.24. Figure 3.24: Fiery Clearwing Moth (Pyropteron chrysidiformis) feeding on a plant. Biodiversity refers to the diversity of species, ecosystems, habitats and ecological processes. It includes both natural and human-modified environments, which together create the conditions for th…
Figure 3.25
Figure 3.25. Figure 3.25: Bocage hay meadow photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p236_3_25.png]
Figure 3.26
Figure 3.26. Figure 3.26: Wetland observed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p238_3_26.png]
Figure 3.27
Figure 3.27. Figure 3.27: Military orchid (Orchis Militaris) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. tem, where they spread rapidly and often outcompete native plants. These plants typically lack natural predators, dise…
Figure 3.28
Figure 3.28. Figure 3.28: Glutinous sage (Salvia glutinosa) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. Applying the municipal catalogue of remarkable species for site PD in Nangy, France does not lead to any significant se…
Figure 3.29
Figure 3.29. Figure 3.29: Common toad (Bufo bufo) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. For some groups of amphibians, identification down to the species level cannot be carried out without genetic analysis due to the…
Figure 3.30
Figure 3.30. Figure 3.30: Reed warbler (Acrocephalus scirpaceus) observed during field investigations, providing valu￾able data on local wildlife presence and ecosystem dynamics. Ornithological surveys were conducted using sound recorders and visually with binoculars and cameras. The survey …
Figure 3.31
Figure 3.31. Figure 3.31: European kestrel (Falco tinnunculus) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. A full database of species observed was established, and it has been integrated into a project-wide geographical inf…
Figure 3.32
Figure 3.32. Figure 3.32: Red fox (Vulpes vulpes) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. Data on terrestrial mammals was collected during all naturalist assessments of other groups on the surface sites. Therefore, data…
Figure 3.33
Figure 3.33. Figure 3.33: Bat detectors used to detect the presence of bats by converting their echolocation ultrasound [PITH_FULL_IMAGE:figures/full_fig_p247_3_33.png]
Figure 3.34
Figure 3.34. Figure 3.34: Common wall lizard (Podarcis muralis) observed during field investigations, providing valu￾able data on local wildlife presence and ecosystem dynamics. Field investigations on the candidate surface site locations focused on identifying reptile popu￾lations in enviro…
Figure 3.35
Figure 3.35. Figure 3.35: Butterfly black-veined white (Aporia crataegi) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. airport may require the consideration of a cross-border impact since some species observed in this zone ou…
Figure 3.36
Figure 3.36. Figure 3.36: Golden-ringed dragonfly (Cordulegaster boltonii) observed during field investigations, pro￾viding valuable data on local wildlife presence and ecosystem dynamics. insect presence. The surroundings of site PB present a habitat with high sensitivity. The wider surroun…
Figure 3.37
Figure 3.37. Figure 3.37: Stream photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p252_3_37.png]
Figure 3.38
Figure 3.38. Figure 3.38: Woodland photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p253_3_38.png]
Figure 3.39
Figure 3.39. Figure 3.39: Italian locust (Calliptamus italicus) observed during field investigations, providing valuable data on local wildlife presence and ecosystem dynamics. The PF site is used as an agricultural meadow and presents moderate ecological states. How￾ever, the site is locate…
Figure 3.40
Figure 3.40. Figure 3.40: Trees in the woodland photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p255_3_40.png]
Figure 3.41
Figure 3.41. Figure 3.41: Daily travel flows (all modes combined) in Grand Geneve (Source Grand-Genève [ [PITH_FULL_IMAGE:figures/full_fig_p259_3_41.png]
Figure 3.42
Figure 3.42. Figure 3.42: Current and potential future extension of the Leman Express [PITH_FULL_IMAGE:figures/full_fig_p260_3_42.png]
Figure 3.43
Figure 3.43. Figure 3.43: Commercial district near the PA site photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p262_3_43.png]
Figure 3.44
Figure 3.44. Figure 3.44: Residential district photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p263_3_44.png]
Figure 3.45
Figure 3.45. Figure 3.45: Overview of the employment opportunities in the perimeter of the FCC reference scenario. [PITH_FULL_IMAGE:figures/full_fig_p264_3_45.png]
Figure 3.46
Figure 3.46. Figure 3.46: Agricultural land photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p265_3_46.png]
Figure 3.47
Figure 3.47. Figure 3.47: Vineyards photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p266_3_47.png]
Figure 3.48
Figure 3.48. Figure 3.48: Architectural heritage photographed during the field investigations. [PITH_FULL_IMAGE:figures/full_fig_p268_3_48.png]
Figure 3.49
Figure 3.49. Figure 3.49: Mountainous landscape with agricultural fields documented during field investigations, high [PITH_FULL_IMAGE:figures/full_fig_p269_3_49.png]
Figure 3.50
Figure 3.50. Figure 3.50: Field-based noise measurements conducted to assess ambient sound levels. [PITH_FULL_IMAGE:figures/full_fig_p271_3_50.png]
Figure 3.51
Figure 3.51. Figure 3.51: Noise measurements taken near a residential area to understand the current noise level. [PITH_FULL_IMAGE:figures/full_fig_p271_3_51.png]
Figure 3.52
Figure 3.52. Figure 3.52: Types of radiation (Source: IAEA [91]). stay only for brief intervals of time, such as roads or sports facilities, and sensitive areas, in which the persons may stay for a certain limited period of time including houses and apartments, schools, and hos￾pitals. Switz…
Figure 3.53
Figure 3.53. Figure 3.53: Average values of the electric and magnetic fields around overhead power transmission lines [PITH_FULL_IMAGE:figures/full_fig_p275_3_53.png]
Figure 3.54
Figure 3.54. Figure 3.54: Expansion and shrinkage of clays. Damage to the building is caused by the rain induced [PITH_FULL_IMAGE:figures/full_fig_p280_3_54.png]
Figure 3.55
Figure 3.55. Figure 3.55: Overview of the RD903 redevelopment project between the A40 Findrol interchange and the [PITH_FULL_IMAGE:figures/full_fig_p285_3_55.png]
Figure 3.56
Figure 3.56. Figure 3.56: The future Ferney Genève ZAC project with an extension of the tram line and terminus located [PITH_FULL_IMAGE:figures/full_fig_p287_3_56.png]
Figure 4.1
Figure 4.1. Figure 4.1: Sustainability dimensions. An appraisal process helps understanding if a programme or project is sustainable and provides means to identify pathways to make them more sustainable. This process integrates financial and socio-economic aspects. The latter comprise socia…
Figure 4.2
Figure 4.2. Figure 4.2: Guidance for the sustainability of public investment projects. From Ref. [ [PITH_FULL_IMAGE:figures/full_fig_p291_4_2.png]
Figure 4.3
Figure 4.3. Figure 4.3: ‘Avoid-Reduce-Compensate’ approach for iterative development of a sustainable project sce [PITH_FULL_IMAGE:figures/full_fig_p295_4_3.png]
Figure 4.4
Figure 4.4. Figure 4.4: Main socio-economic impact pathways that are sustainability enablers of particle accelerator [PITH_FULL_IMAGE:figures/full_fig_p299_4_4.png]
Figure 4.5
Figure 4.5. Figure 4.5: Expression to determine the net present Value (NPV) of an investment project considering [PITH_FULL_IMAGE:figures/full_fig_p305_4_5.png]
Figure 4.6
Figure 4.6. Figure 4.6: The Rumsfeld matrix [225] applied to the identification of costs and benefits of research infras￾tructures. Rationalising comprehensive sustainability assessment using standard cost-benefit analysis [226] helps to identify the sustainability limiting and enabling asp…
Figure 4.7
Figure 4.7. Figure 4.7: Examples for the accounting of full costs and benefits for an integrated sustainability analysis. [PITH_FULL_IMAGE:figures/full_fig_p309_4_7.png]
Figure 4.8
Figure 4.8. Figure 4.8: The UN sustainability development goals (SDG). [PITH_FULL_IMAGE:figures/full_fig_p310_4_8.png]
Figure 4.9
Figure 4.9. Figure 4.9: Comparison of carbon footprint between a small-scale underground metro line, a tramway line [PITH_FULL_IMAGE:figures/full_fig_p313_4_9.png]
Figure 4.10
Figure 4.10. Figure 4.10: Number of persons engaged in the project over the years throughout all project phases. [PITH_FULL_IMAGE:figures/full_fig_p316_4_10.png]
Figure 4.11
Figure 4.11. Figure 4.11: Expected distribution of FCC-ee scientific products over time. [PITH_FULL_IMAGE:figures/full_fig_p323_4_11.png]
Figure 4.12
Figure 4.12. Figure 4.12: Lifetime salary of early-career researchers by sector of employment. [PITH_FULL_IMAGE:figures/full_fig_p324_4_12.png]
Figure 4.13
Figure 4.13. Figure 4.13: Time profile of FCC-ee industry benefits for suppliers, compared with the high-tech invest [PITH_FULL_IMAGE:figures/full_fig_p325_4_13.png]
Figure 4.14
Figure 4.14. Figure 4.14: Distributions of the spending of all on-site visitors, individual visitors and visitors that come [PITH_FULL_IMAGE:figures/full_fig_p326_4_14.png]
Figure 4.15
Figure 4.15. Figure 4.15: Number of on-site visitors attracted by FCC-ee over the period 2024-2064 used for estimating [PITH_FULL_IMAGE:figures/full_fig_p327_4_15.png]

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Cited by 7 Pith papers

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Pith tools

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