Duration: 1 Day Value: £2,295

To carry out an underwater survey to identify the location of a 9” diameter pipe and seal it and the location and nature of debris that has fallen into the canal from above.


The diving works took place within the impounded waters of the Bakers Quay stretch of the Gloucester Docks adjacent to The High Orchard Bridge. Diving conditions were generally benign, with minimal currents or flows below water. The works consisted primarily of an underwater survey, by divers, of the canal wall to identify the location of a 9” pipe and seal it up using a steel blanking plate and secondary mechanical internal bung. And secondly an underwater survey, by divers, of the bed of the canal to identify the location and nature of debris that has fallen into the canal from above.

The main diver entered the water via a ladder secured to the harbour wall; from there the survey of the water bed was conducted and soundings were taken so that an approximate volume and location could be established in relation to the harbour wall. This information was then used to create a simple drawing to assist the client in the removal of the debris.

The diver then relocated to the location of the pipe so that the sealing works could be carried out. Once the diver was in position the bung was lowered into the water and positioned so that it could be tightened by the diver comfortably. Once the bung was tightened the diver retreated to a safe distance so the metal plate could be safely lowered into the water and was then installed by the diver.

The diver then filled up any apparent voids around the steel plate with a proprietary underwater repair mortar to ensure a watertight seal was achieved.

With the diving operations completed, the Diving Permit was signed off and returned to CRT. The site was then demobilised and left in a clean and tidy condition. The works ended in complete success.


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