Woodhead Tunnel, The Peak District

JSM was contracted to decommission and remove 29km of 400kV oil filled cables from the Woodhead Tunnels in the Peak District National Park during 2013. The redundant system consisted of two separate 5.4km 400kV circuits, associated straight joints, stop joints, oil tank farms and auxiliary cables.

Our innovative technical approach involved the use of specially designed swinging davits mounted on train carriages which in turn were hooked up to a train procured specifically for this project. This method was used to safely and effectively remove cut cable lengths from the tunnel ready for recycling.

The scope of works involved the recovery of all insulation oils from the system and the purging of all cables, JSM deployed our own in-house oil engineers and our own oil regeneration plants to complete this element of the works.

JSM thoroughly researched and established the most cost positive and environmentally friendly route to the end recycling process and established a direct engagement with the smelters and end users of the nonferrous commodities. JSM also researched the LME stock trading options on large quantities of metals, where JSM managed through our trading partners to hedge our clients scrap values to gain the very best prices and mitigate loss risk in this unpredictable marketplace.

JSM completed all works on time, without incident and within budget. This project was undertaken in a unique and challenging environment for which JSM won this year’s British Safety Council International Safety Award.