HS2: Speed Restrictions

Lord Berkeley Excerpts

Wednesday 13th July 2022 Lords Chamber

Asked by

[Lord Berkeley]

To ask Her Majesty’s Government what steps they are taking to avoid significant settlements, and consequent speed restrictions, on the route of the HS2 rail line in the area above the Cheshire salt mines north of Crewe.

[The Parliamentary Under-Secretary of State, Department for Transport (Baroness Vere of Norbiton) (Con)]

My Lords, HS2 Ltd has undertaken ground investigations to increase the understanding of geological risks associated with settlement. This work supplements examination of information from the British Geological Survey, historic boreholes, salt extraction operators and action groups. This information has informed the current design.

[Lord Berkeley (Lab)]

I am grateful to the noble Baroness for that helpful Answer. She will be aware that underneath the area where the line goes north of Crewe, there are caverns that are 200 metres high, and only 25% of the salt is remaining and the rest has been extracted. It has been settling for 100 years and probably will continue to settle for that length of time. What is HS2 going to do to ensure that the line remains straight and level, which is necessary for high-speed rail work?

[Baroness Vere of Norbiton (Con)]

Of course, HS2 is well aware of what has happened underneath the Cheshire Basin, and I noted in my previous Answer that groundworks have been undertaken. I am pleased to reassure the noble Lord that that is not the end of it. Plenty more work still needs to be done. A full programme of ground investigations across the entire route will happen between 2023 and late 2025. HS2 is confident that the line can be built on this route at an appropriate cost.