NR TWI 3G048 ISSUE 1 PDF

Introduction

This Track Work Instruction covers how to inspect a culvert. The purpose of this inspection is to confirm that a culvert is working correctly i.e. carrying water from one end to the other unobstructed.

This is not a structural examination, but there will be signs that need to be noted so that qualified examiners can be brought in to detect structural problems.

See also separate instructions:

TWI 2B009 How to maintain catchpits

TWI 2B011 How to recognise a drain failure

TWI 2B012 How to maintain drains

TWI 2B013 How to inspect drainage

TWI 2B017 How to maintain open drains, watercourses and ditches