Western Australian Consolidated Regulations

PETROLEUM PIPELINES REGULATIONS 1970 - REG 14

14 .         Pipeline trenches etc, safety requirements for

                A person shall not enter a trench or other excavation made in connection with the construction or maintenance of a pipeline where — 

            (a)         the nature of the environment and properties and conditions of the soil in which the trench or excavation is made are such that the walls of the trench or excavation are likely to collapse; or

            (b)         the depth of the trench or excavation is greater than 5 feet — 

                unless the walls of the trench or excavation — 

            (c)         have been provided with shoring; or

            (d)         have been battered — 

                in such a manner so as to prevent the collapse of the walls.