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    • Case studies

    Watercourse Crossing – River Colne

     Power
    Expertly navigating sensitive environmental challenges, our 132kV cable crossing project proved that infrastructure development and environmental protection can go hand in hand.
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    Hollow Core Fibre Connection – West London

     Data Centre's, Telecoms
    JSM’s Telecommunications team planned, designed and installed over 18km of hollow core fibre for a Data Centre.
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    Hollow Core Fibre – East London

     Data Centre's, Telecoms
    JSM’s Telecommunications team planned, designed and installed over 21km of hollow core fibre for a Data Centre.
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    Hollow Core Fibre Connection – North London

     Data Centre's, Telecoms
    JSM’s Telecommunications team planned, designed and installed over 21km of hollow core fibre for a Data Centre.
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    Hollow Core Fibre Connection – Central London

     Data Centre's, Telecoms
    JSM’s Telecommunications team planned, designed and installed over 32km of hollow core fibre for a Data Centre.
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    Hollow Core Fibre Connection – London Docklands

     Data Centre's, Telecoms
    JSM’s Telecommunications team planned, designed and installed over 7km of hollow core fibre for a Data Centre.
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    Grid Connection – Belvedere, Dartford

     Power
    JSM’s Power team designed, constructed and energised a 132kV grid connection, spanning 10.6km, whilst overcoming several challenges.
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    Solar PV Farm Connection – Staveley, Derbyshire

     DNO & TSO, Renewable
    JSM’s Power team designed, constructed and energised a 20MVA Solar PV Farm connection.
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    Solar PV Farm Connection – Basildon, Essex

     DNO & TSO, Renewable
    JSM’s Power team designed, constructed and energised a 15MVA Solar PV Farm connection.
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    Solar PV Farm Connection – Braintree, Essex

     DNO & TSO, Renewable
    JSM’s Power team designed, constructed and energised a 35MVA Solar PV Farm connection.
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    Data Centre – Hemel, Hertfordshire

     Data Centre's
    JSM’s Power team designed, constructed and energised a 70MVA Data Centre connection.
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    Battery Energy Storage System – Farnham, Kent

     DNO & TSO, Renewable
    JSM’s Power team designed, constructed and energised a 20MVA Battery Energy Storage System.
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    Battery Energy Storage System – Broadditch, Kent

     Data Centre's, DNO & TSO
    JSM’s Power team designed, constructed and energised a 21MVA Battery Energy Storage System.
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    Redundant 400kV oil filled cable removal in Ross-on-Wye, Hertfordshire.

    Power
    JSM were appointed to remove the redundant Ross-On-Wye 400kV oil filled cable route section of a 1.98km circuit. This included joint bays between Walford SEC and joint bay 11/12, near the Wye River in a site of special scientific interest (SSSI) site. The total length of this twin circuit was 1.98km.

    Joint Bay and 132kV circuit removal in Westcombe Park, Greenwich.

    Power
    JSM were appointed to remove two joint bays and 460m of a 132kV circuit whilst installing a new usable 160mm SDR11 duct at the Westcombe Park site in Deptford.

    30km Fibre Installation, Billericay, Essex

    Telecoms
    Client appointed JSM to deliver a new fibre infrastructure network for their client. Due to the complexity of the project, it has been agreed to deliver it in 2 phases.

    Battery Energy Storage System (BESS) 33kV Substation & Contestable Connection & full EPC

    Power
    JSM supplied and installed a DNO 2-panel 33kV substation and associated contestable works and associated cabling.

    60MVA 132/11kV Contestable Connection Hemel Hempstead

    Power
    JSM was awarded the contract to provide a 60MVA 132KV Connection a new Data Centre in Hemel Hempstead.

    Multi Utility New 250mm Gas Main Installation

    Gas
    JSM was appointed Principal Contractor to install multiutilities for a multimillion pound development of 4 commercial properties and one Data Centre.

    80MVA 132/11kV Data Centre Connection, Dagenham

    Power
    JSM were appointed as Principal Contractor to deliver a new dual 132kV ducted cable and fibre installation system as part of the Design and Build of a dual 80MVA Connection into UKPN’s network and construction of a new 132/11kV substation and a Data Centre.

    66kV Electrical Connection, Hillingdon

    Power
    JSM was appointed as Principal Contractor to deliver a new cable installation comprising of a single, dual and triple 66kV circuits and pilot cables on a 10km route in the London Borough of Hillingdon.

    130km Fibre Installation, Welwyn to Slough

    Telecoms
    Client appointed JSM to deliver a new network build for their client. JSM delivered this complex project in its entirety including surveys, redesign, construction, fibre installation and testing.

    18km Fibre in Sewer Installation, London’s West End

    Telecoms
    JSM was appointed to provide a fibre in sewer (FiS) solution for our client involving 3 different network operators.  3 x 144f, one per operator, connected to two West End of London Exchanges.

    107km PIA Fibre Installation, Slough to Brighton

    Telecoms
    JSM was appointed to deliver a new telecoms network infrastructure for the client that would utilise traditional civils build duct and chamber installation, 3rd party existing duct routes and existing BT Openreach infrastructure under the Physical Infrastructure Access (PIA) process.

    Multi Utility, Principal Place, City of London

    Multi-utility, Telecoms
    JSM was appointed Principal Contractor to provide multi-utility service diversions to facilitate piling operations for a new development in Central London. The modified building footprint impacted the public highway affecting eleven statutory utilities.

    Multi Utility, Camden Lock Village, London

    Multi-utility
    JSM was appointed to carry out complex multi utility civils and installation for gas, water, electricity and comms on the Camden Lock Village mixed use regeneration project in the heart of the old Camden market in London.

    Multi Utility, Hearn Street, Hackney, London

    Multi-utility
    JSM was employed as specialist contractor to provide multi-utility service installations for the BMCE new build Commercial and Residential high-rise buildings on London’s Hearn Street, Hackney.