Paragraph 316 Further provisions about worksI1

Where excavation of trenches (including excavation by dredging) adjacent to a pipeline affects its support, the pipeline must be supported in a manner approved by HPU.

Where the undertaker proposes to carry out excavations which might affect above ground structures such as pipeline supports in the pipeline corridor, the undertaker must calculate the zone of influence of those excavations and provide those calculations to HPU under paragraph 308.