Many of the decommissioned substations we are asked to work on have previously been demolished to slab level. Our job is to remove the redundant oil filled cables that have left the land owners with environmental liabilities or health and safety issues.

Please see the case studies below for two Decommissioned substations we have worked on.

Case Study – Inverkip Power Station

Inverkip power station was an oil-fired power station in Inverclyde, on the west coast of Scotland. Built in the 1970’s, it was rarely used due to soaring oil prices.

The site to be decommissioned was the cable run from the former Inverkip Power station, Inverclyde to the live 400kv Inverkip switching station. The Power Station had been demolished to slab level by Brown and Mason, leaving the redundant 400kv oil filled cables that run from the former power station up to the 400 KV switching station. There were three circuits, three cables per circuit identified as copper cores, paper insulated and aluminium sheathed. There were approximately 49 control cables that follow the same route. The 400kv cables are oil filled and oil had been partially removed from the lower Section (from power station to railway line). The upper section was still full of oil. This was a liability for Scottish Power. The cable route was through woodland, cable tunnels, ducting under Network rail, railway line and through farmland.

Click here to download and read the full case study pdf of the Inverkip Power station (2mb)

Case Study – SSE Ferrybridge

The site was located adjacent to the operational Ferrybridge C Power station. The Gilmerton Land Services (GLS) work area was located within the busy construction site of the new Multifuel Power Station. GLS was contracted to remove the liability of 2 circuits of oil filled 132KV cables from the work area to allow the new construction works to proceed safely and efficiently. GLS had to work in partnership with other contractors and maintain good communications to ensure works were carried out safely between all operatives on site. The Key objective was for GLS was to remove the environmental liability of the cable. The cable had been re-routed by others and the redundant section remained for GLS to recover and recycle. The cable was made of copper cores, corrugated aluminium sheath and oil fluid tubes.

Click here to download and read the full case study pdf (1.8mb)

Case Study – Royal Ordnance Factory, Chorley

RO Chorley The Royal Ordnance Factory at Chorley was opened by HM George VI on 31st March 1939 and until 1990 produced explosives and filled bombs.

The factory was hailed the finest civil building construction in the World, employing 15,000 building workers to complete it and requiring 20 million bricks, 1 million cubic yards of concrete (which required the World’s largest concrete mixer 120′ high and turning out 5,000 tons of concrete in one day), 50 miles of roads and 25 miles of railway tracks.

In 1998 British Aerospace started a major decontamination and demolition programme. Gilmerton Land Services were chosen to specifically remove all disused underground services and decommission 14 major substations.

GLS’s requirement was to recover 100 miles of disused power cables and water mains within this programme and the necessity to identify and retain live services within the site was of utmost importance. GLS successfully carried this out, leaving the site infrastructually tidy under the ground. GLS segregated and marketed several thousand tons of recovered material.