Guide to inspection of underwater structures (2001)

Whether above or below water the requirements of structural inspection are the same; to obtain an accurate record of the existing condition. In addition to structural deterioration specific potential problems relating to submerged structures such as scour, erosion, and accelerated local corrosion problems also need to be checked.

The preparation of the inspection report will normally be the responsibility of an Engineer who may not have an in-depth knowledge of underwater inspection techniques. The purpose of the Institution’s new Guide is to provide advice to engineers, their clients and supporting contractors so that inspections are conducted in a safe manner and provide accurate and meaningful information at reasonable cost. This Guide is therefore essential reading for any of the parties likely to be involved in such inspections.

Current practice for undertaking inspections of underwater, inland and coastal structures in water depths of up to 30m including inspection techniques, equipment and safety are examined. The guide also takes into account the provisions of the Diving at Work Regulations 1997 and the associated Approved Code of Practice (ACOP).

• Individual chapters consider:


• Glossary of terms


• Typical defects


• Inspection planning


• Inspection and investigation


• Overview of diving techniques


• Overview of non-diving techniques


• Contract documents


• Assessment of tenders for diving contracts


• Responsibilities on site

Reporting Appendices provide a bibliography, a list of terms, advice on the design of limpet dams, and typical forms used in the overall process. The Institution also gratefully acknowledges the sponsorship provided for this report by the Environment Agency, the Highways Agency, British Waterways and Defence Estates. While it is intended that the contents of the report reflect current UK practice, input has been provided by corresponding members of the task group, and others, in South Africa, Jamaica and Australia.