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Mantoudi-Skiathos Interconnection (Greece) -Subsea Cable Laying & Protection

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The project Mantoudi-Skiathos Interconnection concerns the design, supply and installation of a single circuit 150kV AC Submarine and Underground Transmission Line for the interconnection of Skiathos Island to the Evia Island (Mantoudi), adjacent to Greek mainland.

The transmission line is situated in Skiathos Municipality, Magnisia Regional Unit (Thessalia) and in Istiaia – Aidipsos Municipality, Evia Regional Unit (Central Greece). The full length of the provisionally selected submarine cable route is approximately 30,000m and the maximum sea depth encountered is approximately 260m.

Fulgor has awarded ASSO a contract for the execution of activities of submarine cable laying, landing and protection.

Asso’s scope of work included:

  • Preparation activities // Mobilization activities
  • Cable loading & transportation
  • Pre-excavation – Onshore
  • Pre-excavation – Nearshore/Shallow
  • Pre-lay (visual ROV) Survey
  • Pre-lay mattresses supply & installation
  • PLGR
  • Onshore pull-in
  • Free-Laying
  • Half shell polyurethane ducts supply & installation
  • CIS supply & installation
  • Post Lay Burial by means of Trenching – Nearshore/Shallow
  • Post Lay Burial by means of Jetting – Offshore/Deep
  • Post Lay Burial by means of Trenching – Offshore/Deep

PROJECT SPECIFICATIONS

  • Owner
    ADMIE (IPTO)
  • Contractor
    Fulgor S.A Hellenic Cable Industry
  • Year
    2020
  • Location
    Greece
  • Cable Type
    hvac
  • Cable Diameter
    216mm
  • Alternative Protection
    Cast Iron Shells: 890m, Mattresses: 80m, Rock bags: 35pcs, Half shell polyurethane ducts installation: 370m, Concrete layer installation: 70m
  • Laying Length
    29110m
  • Trenching Length & Burial Depth
    1130 (Pre) & 3360m (Post) @ 0.5m, 1.0m, 1.6m or 2.0m
  • Jetting Length & Burial Depth
    23795m @ 1.0m (1st pass) & 8910m @ 1.0m (Additional passes)
  • Max Water Depth
    260m

    Mantoudi-Skiathos Interconnection (Greece) -Subsea Cable Laying & Protection

    The project Mantoudi-Skiathos Interconnection concerns the design, supply and installation of a single circuit 150kV AC Submarine and Underground Transmission Line for the interconnection of Skiathos Island to the Evia Island (Mantoudi), adjacent to Gr …

    Mantoudi-Skiathos Interconnection (Greece) -Subsea Cable Laying & Protection

SERVICES PROVIDED

Some of the services we provided for Mantoudi-Skiathos Interconnection (Greece) -Subsea Cable Laying & Protection 

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VESSELS USED

  • Ariadne

    DP III – Cable Laying Vessel The Ariadne is a DP-3 Cable Laying Vessel built for worldwide operations, …

    Ariadne Cable Laying Vessels
  • Atalanti

    DP II – Cable Laying Vessel The Atalanti is a DP-2 Cable Laying Vessel that has been specially …

    Atalanti Cable Laying Vessels
  • Aethra

    DP II – Trenching Support Vessel The Aethra is a DP-2 Trenching Support Vessel built for worldwide operations, …

    Aethra Trenching Support Vessels
  • Astrea

    DP II – Multipurpose Support Vessel The Astrea is a DP-2 Multipurpose Support Vessel built for worldwide operations …

    Astrea General Support Vessels

EQUIPMENT USED

  • AssoTrencher IV Mk12

    AssoTrencher IV Mk12 sits at the top of the trenchers’ range and is currently undergoing its twelfth upgrade. …

    AssoTrencher IV Mk12 Deep Water Trenchers, Subsea Burial Equipment
  • AssoTrencher V Mk3

    Assotrencher V Mk3 is the 3rd version of the AssoTrencher V vehicle from the AssoTrencher series, designed for …

    AssoTrencher V Mk3 Shallow Water Trenchers, Subsea Burial Equipment
  • AssoJet III Mk2

    The AssoJet III Mk2 is the newest of the ASSO’s jetting ROVs. It is in-house designed & is …

    AssoJet III Mk2 Deep Water Trenchers, Subsea Burial Equipment

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