Disused Mineworks in Skewen: Flooding

Anne-Marie Trevelyan Excerpts

Monday 8th March 2021 Commons Chamber

[The Minister for Business, Energy and Clean Growth (Anne-Marie Trevelyan)]

I thank the hon. Member for Aberavon (Stephen Kinnock) for his campaigning on this issue, which I recognise is a very serious one indeed for the residents of Skewen. I would also like to add my respectful gratitude to all those he mentioned who have helped residents through this incredibly difficult and stressful time. Some years ago now when Morpeth, just outside my constituency, was flooded, it was extraordinary to see the commitment—the continued commitment—of those among the affected who just quietly continued to support people and make sure that families got back on their feet, so I absolutely understand that. I just wanted to put on the record my thanks to them too, because I know just how difficult that can be.

I would like to provide the House with a little background on the important work that the Coal Authority undertakes, which I feel is relevant to the hon. Member’s very important constituency situation. The coalfield areas of Wales, England and Scotland cover some 26,000 sq km, or 11% of our country’s surface area. Since the start of the industrial revolution, human settlement has followed natural resource availability, industry and employment. The coalfields are consequently some of the most densely populated parts of the UK. Some 7 million properties lie within the coalfields, with 1.5 million properties lying above workings where coal has been mined at a depth of less than 30 metres, and more than 170,000 mine entries are known of. Alongside these, there are hundreds of miles of underground roadways, adits and drainage systems, which are often only partially mapped, especially in very historic coalmining areas.

In south Wales, 52% of the population live on the coalfield, and the vast majority will fortunately never experience any issues. Although there is little active coalmining today, centuries of underground and surface extraction have created a legacy of environmental issues and public safety hazards. As the hon. Member mentioned, the Coal Authority was created under the Coal Industry Act 1994, when the previously state-owned coal industry was privatised, to regulate the industry and manage these legacy issues. The authority helps to manage the UK’s energy legacy safely and responsibly.

A substantial legacy of mining hazards remain in many major conurbations, with one third of the documented coalmine entries being in urban areas. Surface collapses above abandoned workings and shafts present the most common risks to the public. The authority therefore has a 24/7 hazard line, enabling the public to report mining hazards around the clock, in order to ensure immediate responses. Approximately 1,000 surface and subsidence incidents are reported each year, about half of which are found to be coalmining related. The scale of the issues means that costly proactive remediation of the surface effects of mine workings and mining entries is carried out only when there is a higher risk to persons or property. In 2008, the authority began a risk-based mine entry inspection programme to identify such areas for proactive remediation. To date, some 149,000 shafts have been inspected, less than 1% of which have required remedial treatment.

The coalmine works in Skewen date back beyond 1830. There are 287 recorded mine entries in the immediate area of Skewen, which are part of the proactive inspection programme. The mineshaft involved in this awful flood and the area around it was inspected in 2011, as the hon. Member mentioned, and no concerns were identified at the time. It was mapped approximately 20 metres away from where the Coal Authority now know it to be. A mine drainage level in the vicinity has operated effectively for a very long time, but had become blocked, causing water and pressure to build up, eventually connecting with the nearby mineshaft, which allowed it to rise to the surface. The additional heavy rain from Storm Christoph caused the water to force its way out, leading to the flooding on 21 January. This is considered an extremely rare event and was unforeseeable.

Since then, the Coal Authority has worked fast with local partners and continues to provide a blended package of support to the community, which has included developing a solution to reduce the risk of this ever happening again, cleaning up in the aftermath of the flood and practical help for residents affected, including, to date, increasing the maximum payment for each household for outside restoration to £500. However, this is without doubt a deeply sad and very upsetting incident, and I heard absolutely what the hon. Member for Aberavon said about liability and, indeed, moral responsibility.

The Coal Authority’s work handling subsidence and safety issues associated with former coalmines is a statutory duty under the Coal Industry Act 1994 and the Coal Mining Subsidence Act 1991. The 1991 Act sets limits to the liability in terms of defining coal-mining subsidence damage. Flooding such as that at Skewen does not form part of these duties, because flooding, whether the water comes from a river, a stream, the sea, groundwater or a mine, is dealt with in the main through insurance. The Coal Authority is doing everything it can to support the community within the bounds of the legislation and the guidance it has to work within, but I am very pleased to note that, following a meeting last week, the Coal Authority is reviewing its package of support. I shall watch closely to see how that progresses.

The scale and complexity of our historic mining legacy mean that the authority will never be able to inspect all that is underground. I deeply sympathise with the hon. Member’s constituents and I realise that this is an incredibly frustrating and distressing time for them. However, it is neither affordable nor practical to underwrite flooding damage risk associated with former mining works for some 7 million properties, any more than it is for flooding from other sources. None the less, I will continue to monitor progress and hope to get to Skewen for myself as soon as lockdown restrictions allow, so that I can hear at first hand both from residents and those of the coal authority charged with the management of our coal mining legacy. I will watch very closely to see how this revised package under consideration rolls out. Once again, I hope very much that, when the lockdown restrictions hopefully lift in the weeks ahead, I can get on a train and head to south Wales as soon as I can.

Question put and agreed to.