Managing Hydrotechnical Hazards for Pipelines Located Onshore or Within Coastal Areas Sets out criteria for the design, cons truction, operation, mainte ce, and abandonment of onshore pipe lines that could affect high consequence floodplains and associat ed commercially navigable waterways. This document applies only to steel pipe lines that transport gas, hazardous liquids, alcohols or carbon dioxide. Th e design, construction, inspection, and testing provisions of this document should not apply to pipelines that were designed or installed prior to the late st revision of this publication. The operation and mainte ce provisions of this document should apply to existing facilities. The contents in th is document should not be considered a fixed rule for application without re gard to sound engineering judgment