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LSM Interconnection Cable Laying (8)

The Lavrio-Serifos-Milos Interconnection

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The Lavrio-Serifos-Milos Interconnection, part of Phase D of the Cyclades Islands’ integration into the Hellenic Electricity Transmission System, involved the installation, laying, and protection of two 150 kV HVAC submarine cables, connecting the islands of Serifos & Milos into the mainland Power Transmission System, for a total length of more than 150km. A larger cable cross-section was applied in shallow waters for enhanced durability. The seabed along the route is primarily composed of sand, clay, silt, and localized gravel deposits that overlay a harder substrate (bedrock or cemented sand/gravel), with notable substrate outcrops near the island of Milos. The selected submarine cable route spans approximately 156 km, reaching a maximum water depth in excess of 500m, and required four separate landings. 

Asso’s scope of work included: 

•             Preparation Activities // Mobilization Activities 

•             Geophysical and Geotechnical Survey 

•             Pre-lay Grapnel Run Operations 

•             Route Clearance Operations 

•             Cable installation 

•             Jointing activities 

•             Pre-lay Mattresses installation Operations 

•             Pre-excavation and landfall works, pull-in assistance 

•             Post Lay Burial Mechanical Trenching  

•             Post Lay Burial Operations -Jetting 

•             ROV Survey 

•             Uraducts installation 

•             Rock bags installation 

•             Post-lay Mattresses installation Operations 

PROJECT SPECIFICATIONS

  • Owner
    ADMIE (IPTO)
  • Contractor
    Fulgor S.A
  • Year
    2024
  • Location
    Cyclades Islands
  • Cable Type
    hvac, xlpe
  • Cable Diameter
    500mm2 & 630mm2 Cu cross-section
  • Cable Weight
    80kg/m & 85,5kg/m
  • Laying Length
    156km
  • Trenching Length & Burial Depth
    25km
  • Jetting Length & Burial Depth
    129km
  • Max Water Depth
    502m

    The Lavrio-Serifos-Milos Interconnection

    The Lavrio-Serifos-Milos Interconnection, part of Phase D of the Cyclades Islands’ integration into the Hellenic Electricity Transmission System, involved the installation, laying, and protection of two 150 kV HVAC submarine cables, connecting the isla …

    The Lavrio-Serifos-Milos Interconnection

SERVICES PROVIDED

Some of the services we provided for The Lavrio-Serifos-Milos Interconnection 

VESSELS USED

  • Ariadne

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

    Ariadne Cable Laying Vessels
  • Argo

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

    Argo Trenching Support Vessels
  • Artemis

    DP I – Anchor Handling and Supply Vessel The Artemis is a DP-1 Anchor Handling Tug & Supply …

    Artemis General 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
  • Alcyone

    Multipurpose Support Vessel The Alcyone is a Multi-Purpose Support Vessel specially built for shallow water operations, in light …

    Alcyone General Support Vessels
  • Hydna

    Multipurpose Support Vessel The Hydna is basically a towing vessel that is mostly used as a Multipurpose Support …

    Hydna General Support Vessels

EQUIPMENT USED

  • AssoTrencher IV Mk9

    AssoTrencher IV Mk9 sits at the top of the mechanical trenchers range as it forms the latest version …

    AssoTrencher IV Mk9 Deep 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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