In the heart of the alluring Welsh Valleys, we completed packages of HPD testing in boreholes of flinty chalk in the small towns of Knighton and Nantmel. The project was for the new conduits for the Elan Valley Aqueduct, which is a Victorian tunnel that provides fresh drinking water to Birmingham and other parts of England.

This project saw us having to use our equipment in unusual circumstances because the HPD boreholes were on the steep hills and valleys.  Our engineers worked out of the back of track dumpers because it was the only way to cross the sloping, muddy terrain.

We completed 50 HPD tests, each at approximately 5-10 metre intervals reaching a total depth of 30-90 metres.