Felixstowe Reinforcement 132kv & 33kv

Project Details: Felixstowe Reinforcement 132kv & 33kv

The DNO implemented an EHV reinforcement of the Felixstowe, Shotley and Harwich Peninsula. The circa £30 million scheme consisted of the installation of the new 132kv & 33kv circuits, upgrades to two existing grid substations, two primary substations along with the construction of a new 33kv switch room.
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Years Of Experiences

Dates on Site

January 2016 to April 2018

Scope of Works

  • Supply Competent Management and Supervision for the works.
  • Topsoil strip replacement of a 20m wide working easement in arable fields, total distance 14km.
  • Installation of various fencing types including post & rail, palisade and stock proof fencing.
  • Installation of haul roads both stone and traditional trackway.
  • Construction of reinforced concrete base 40m x 40m for cable storage.
  • Soft and hard landscaping.
  • Arborist works.
  • Land clearence as part of enabling works.
  • Excavation and duct installation of 2 x 132kv circuits, total distance 11km, works in both arable fields and highway.
  • Excavation and duct installation of 2 x 33kv circuits, total distance of 25km, works in arable fields and highway, Port of Harwich, school fields and public parks.
  • Excavation and duct installation within operational substations.
  • Cable installation within operational substations.
  • Construction of 132kv and 33kv joint bays.
  • Construction of fibre chambers.
  • Installation of 132kv and 33kv cables inclusive of testing to client specification.

Challenges

 

  • Due to the size of the project and varied disciplines regular attendance of progress and planning meetings were required to ensure the works were implemented successfully.
  • The project was spread over a large geographical area, so the organisation of operatives, plant and material delivery was vital to ensure the programme was adhered to.
  • Works undertaken with SSSI’s and RAMSAR sites and various environmental considerations.
  • A proportion of the works was undertaken within the boundaries of a primary school in term time, strict delivery and management of vehicle movement was essential.
  • Works undertaken within the operational area of Harwich International Port.
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