Grade Control Structures for Pipeline Crossings in the Arid Southwestby Martin J. Teal, (M.ASCE),
Abstract: Pipeline crossings at streams, rivers, and washes are at risk due to bed and bank erosion in the river environment. Buried pipelines may be exposed in the channel bottom by scour of bed materials or in the floodplain through migration of the channel banks. Pipelines carried across streams on bridges are at risk from scour at bridge piers and bridge abutments. This paper describes measures that can be taken to prevent erosion at pipeline crossings utilizing grade control structures, emphasizing the authors experience in the Southwestern United States. A brief review of countermeasures to control vertical erosion (scour or degradation) is followed by a design example for a pipeline crossing threatened by scour.
Subject Headings: Pipeline crossing | Grade control structures | Structural control | Drop structures | Arid lands | Scour | Bridge abutments | Buried pipes | Erosion | Risk management | Pipe bedding | River bank stabilization | North America | United States
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