Pipeline Crossings (Manuals and Reports on Engineering Practice #89) was prepared by the Task Committee on Pipeline Crossings, Pipeline Crossings Technical Committee, Pipeline Division of the American Society of Civil Engineers. The purpose of this manual is to present common approaches for the design of crossing installations through the use of examples of standard practice as they exist in industry today. While the emphasis is on the pipeline crossing techniques of highways, railroads, and waterways, they can also be applied to cable and conduit crossings. The manual is divided into four major sections. First, general concepts are presented, including crossing environments, permits, and a description of the various types of crossings. The second section discusses the design issues while the different construction methods are explored in detail in the next section. Finally, the fourth section features a glossary of terms and a bibliography of resource materials. For new engineers, this manual may supplement what they were taught in school about pipeline design and construction. For more experienced engineers, it will hopefully provide useful options and guidelines from current practice.