Stonbury are immensely proud to be supporting our clients across the UK at such a crucial time and have been designated as 'key workers' by DEFRA and the UK water utility companies. Our teams are working tirelessly to help secure and maintain drinking water supplies, ensuring clean and safe drinking water is provided without interruption to critical services such as our hospitals as well as the general public. Now more than ever, the safety and wellbeing of our staff is of the utmost importance and we have adapted our safe working practices to ensure social distancing precautions are in place and that the correct hygiene practices are being followed. Making safety is our priority, and we endeavour to make sure everyone at Stonbury goes home safe to their family.
Stonbury have recently completed an interesting project in a very sensitive and remote location.
We were contracted to carry out repairs to an existing spillway, where major erosion of grout from between the spillway stone sets had begun to make the spillway unstable.
After periods of heavy rainfall the reservoir level would come up very quickly and such was the force of water escaping down the spillway it was starting to lift and displace some of the sets.
With a start in late August, when the reservoir was at a natural low level, we first had to rake out and pressure wash the joints, between the sets, to remove loose mortar, debris and vegetation.
Re-Pointing was then carried out using a rapid setting, high strength cement mortar chosen for its environmentally friendly composition and drinking water approvals.
After a contract period of 5 weeks a total of 540 bags of mortar (13.5 tonnes) were hand placed within the spillway to ensure its future stability.
Other works included re-forming concrete spillway steps, installing new concrete haunching to the full length either side of the spillway, re-stabilising sections of the stone spillway walls and repairs and re-grading along sections of the 2 mile stone access track.