Tag Archives: Survey

Cockfosters Tag & Trace Survey

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DPSS were employed to perform a Tag & Trace Survey at Cockfosters Depot.


This was part of the preliminary phase of works which would lead to the installation of new maintenance facilities.


The upgrade to Cockfosters Depot will see the demolition of the existing depot, cleaning shed and train wash. This will be followed by the construction of a combined maintenance and cleaning shed, new internal access road, car parking, vegetation removal and associated works by VolkerFitzpatrick.


The Tag & Trace Survey scope was to identify:
– Electrical Systems
– AC Mains (LV, High Mast Lighting, Walkway Lighting)
– DC Mains (Traction Current)
– Communications (Telephone line, Data cables, security cables, CCTV, BMS, PA)
– All cable runs, including interlocking Machine Rooms (IMR) cables
– All Switch rooms
– Fibre Optic Cabling
– Signalling Systems
– Fire Systems
– Legacy Assets (redundant assets which are no longer in use, but are still in-situ)

DPSS Tagged & Traced over 2000 cables across 4 main areas of the depot.

LVAC Cable Pull – Uxbridge

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As part of the dual power SER upgrades DPSS were tasked by Amco Giffen with the survey, route design and installation and commissioning of the SWA supply cables for various stations across the network. This ranged from 90mm 4 core right up to 300mm 4 core SWA.

At Uxbridge Station DPSS installed a 120mm 4 Core along with a 95mm CPC Earth cable. Because of the distances the cable needed to run we also performed mutliple joints.

Warehouse Lighting

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DPSS have recently completed the installation of 72 High Bay lights and new Distribution Board at a brand new Warehouse in Heathrow, London.

All cables, CMS, Bracketry & Lights were installed on time and within budget for the client., glanding, terminating & testing completed too.

Our lead Level 4 Electrician,  City & Guilds 2396 Design & Verification qualified & BTEC Level 4 HNC Diploma in Construction and the Built Environment,  desiged the contactors layouts and lighting circuits for the client. A new DB was also installed to support the lighting circuits.

The guys at DPSS have enjoyed working on a different project during the COVID-19 Pandemic. To ensure their safety they have their temperature taken before starting on site and wear masks to protect themselves and others.

 

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Harringworth Viaduct Survey

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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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