In My Area

Planned improvements

Elan Valley Aqueduct - Nantmel



16 Apr 2018

Estimated completion date
Upcoming work
Work in progress
Work completed

Site reinstatement complete - April 2018.


Start of underground tunnelling - April 2017.


End of underground tunnelling - December 2017.


Start of site preparation - September 2016.

Start date

12 Sep 2016

There are currently no disruptions

There are currently no disruptions

There are currently no disruptions


The Elan Valley Aqueduct (EVA) is over 100 years old and so is in need of some modernisation.

We cannot shut down the EVA to carry out work, as it provides a vital water supply for Birmingham. We are therefore building new bypass sections alongside the EVA at Bleddfa, Nantmel and Knighton where the EVA needs refurbishment.

To create each bypass a shaft is first built at either end and a 3 metre diameter tunnel boring machine is then driven underground to cut the new bypass tunnel between the shafts.

Once the bypass is complete the new section is connected to the EVA. This means most of the work is not noticeable above ground and can be completed without interruption to the EVA flow.

Tunnel Boring Machine at Bleddfa

Why are we doing this?