CASE STUDY: Live Repair & Robotic Survey

We were employed to carry out an ROV programme for a water utility company. When carrying out an ROV inspection of an asset, a leak was observed on one the roof beams (despite no flood test having been carried out). The ROV team identified the ingress and marked an accurate location on the reservoir schematic and survey.

On the back of the inspection the client engaged Panton Mcleod to provide a remedial works scope to rectify the ingress. Due to the critical nature of the reservoir, it could not be taken out of supply. Therefore, the scope of works was designed so that “live” remedial works could be carried out. This incorporated use of ROV for inspection of the works once completed.

Panton Mcleod then deployed a multi-disciplined team capable of delivering “live” remedial works and robotically surveying the cell post repair to see if the ingress had been rectified. The use of the multi-disciplined team would also reduce costs for the client.

The team were fully briefed on the scope of works but were also supplied with an alternative methodology should the scope change after excavation works. All working methodologies were designed to carry out works over the “live” cell while ensuring water quality. Due to the remote location of the reservoir the team were also supplied with additional equipment and repair materials should they face an unexpected change to the scope of works.

On site the team excavated on the marked location of the leak and identified a crack on the existing roof surface which was allowing ingress into the cell. The team mechanically abraded the concrete surface and then applied a Reg 31 cementitious product to seal identified crack. The working area was then cleaned, and then further repairs were carried out. These included applications of a bandage system and a waterproofing membrane, which were applied locally. This was to ensure water could not track from elsewhere on the localised roof surface.

A localised flood test of the area was carried out as requested by the client. The ROV was then deployed to allow a live inspection to ensure the ingress had been successfully resolved.