DPSS have been busy….

DPSS have been very busy in the office putting tenders and prices together for future works, some of the works we have been doing out on site are as follows:

  • SWIP Tranche 2 Installs at various sites across London Underground
  • Walthamstow Central CCTV upgrade works
  • Firstco Greenwich Power Station installation works
  • Cubic SC3 Ticket machine upgrade works
  • Fit for the Future ticket hall works


This is the installation works we have been completing for Tranche 2 at Latimer Road…

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Project Focus – Next Train Indicators

Project Title: Next Train Indicators

Sites: Southfields, Wimbledon Park, Putney Bridge, West Brompton & Seven Sisters

Client: Station Works Improvement Program & TFL

Duration: November 2014 to May 2015

Description: DPSS surveyed all 5 sites and carried out Structural Assessments prior to producing a Conceptual Design Specification document for LUL Asset Engineers Approval. A Total of 7 NTIs were installed across 5 platforms and 2 Concourse Areas on Posts or Brackets. Power and Communication cables were run and associated CMS where required.

DPSS carried out “Trial Fits” of the units on Seven Sisters Platform 4 to ensue that the proposed location did not interfere with the Train Drivers OPO Camera Views.

All cables were terminated and tested and information provided to TFL to allow the NOWRI to be passed and to allow bringing into service.

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Harringworth Viaduct Survey

This month DPSS have been surveying the Harringworth Viaduct , all 1275 yards of it!

The Harringworth Viaduct, also known as Welland Viaduct and Seaton Viaduct crosses the valley of the River Welland between Harringworth in Northamptonshire and Seaton in Rutland. It has 82 arches, each of which has a 40 feet (12 m) span. It was completed in around 1878 and is the longest masonry viaduct across a valley in Britain. It is the longest structure of its type on Britain’s Railway Network.

The Harringworth Viaduct is a grade II listed structure, it comprises 82 arches, each with a 42ft (12.7m) span.  The average height of the arches is 57ft (17.2m), but the highest is 70ft (21.2m). The viaduct is constructed from some 30,000,000 bricks, all manufactured on site, with Derbyshire Gritstone springers, string courses and coping. As well as the bricks, construction required some 20,000 cubic yards of concrete, 19,000 cubic yards of stone, 37,543 cubic yards of lime mortar, and 5,876 cubic yards of cement. The project was started in March 1876, and all 82 arches completed by July 1878.

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