Project Overview

This scheme involved repairs to the existing reservoir infrastructure in order to make it fit for purpose.

The existing stone spillways and cascades were in poor condition. Repairs were undertaken which involved the removal of areas of loose stonework and replacement using a mortar approved by Environment Agency Wales. Pointing of stonework was then carried out after the repairs using EAW approved pointing mortar.

Existing baffle walls had also been damaged and required repair; this work involved the installation of temporary supports to ensure that existing undermined stone copings weighing approximately half a ton did not fall during the operation and that our operatives could work safely.

Further concrete repairs were then carried out on the lower spillway. This spillway had a gradient of approx 35 degrees which made this part of the scheme challenging for our operatives in terms of maintaining diversion of flows and a dry work area.

The method statements for flow diversions and temporary works on this scheme had to be submitted to Environment Agency Wales for approval prior to works commencing on site.

This work had to be carried out during periods of dry weather in order to avoid wash out of new work and in conjunction with Dŵr Cymru / Welsh Water operations staff to ensure continuity of water supplies to users.

Work Scope

  • Removing and replacing existing stone in revetment.
  • Repair scour damage to existing stonework baffle walls.
  • In-situ concrete repairs to lower spillway.
  • Stream diversions and temporary works to approval of EAW.

Client Testimonial

"Great team, willing to give ideas to help the project run smoothly."

- Richard Terrell, Reservoir Engineer

  • Client
  • Dŵr Cymru / Welsh Water
  • Site
  • Lower Neuadd Reservoir, Merthyr
  • Project
  • Works to Baffle Wall