scope:

This document sets out the requirements for Underwater Examinations.

The specification contains the requirements Underwater Examinations for the following types of structures:

 a) Bridges;

 b) Culverts;

 c) Retaining Walls.

Applies to structures where an Underwater Examination has been instructed, and all watercourses at a structure.

NOTE: i.e.. where there are multiple watercourses at a structure requirements apply to all watercourses.

Purpose

This module provides a specification to mitigate the risk of failure to undertake a compliant underwater examination for a structures asset which could result in potential functional failures going undetected by the asset management team [Structures] and might result in accidents and/or disruptions to the operation of the railway network.