Bridge scour and stream instability countermeasures : experience, selection, and design guidance : third edition. Volume 2

20093rdArneson, Larry A.; Pagan-Ortiz, Jorge E.PDFTech ReportFHWA-NHI-09-112DTFH61-06-D-00010/T-06-001ScourBridge foundationsBridge piersNational Highway Institute (U.S.)Lagasse, P. F.Clopper, P. E.Pagan-Ortiz, J. E.Zevenbergen, L. W.Arneson, L. A.Schall, J. D.Girard, L. G.Ayres AssociatesUnited States. Federal Highway Administration. Office of Bridge TechnologyNational Highway Institute (U.S.)NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresFederal Highway AdministrationThis document identifies and provides design guidelines for bridge scour and stream instability countermeasures that have been implemented by various State departments of transportation (DOTs) in the United States. Countermeasure experience, selection, and design guidance are consolidated from other FHWA publications in this document to support a comprehensive analysis of scour and stream instability problems and provide a range of solutions to those problems. Selected innovative countermeasure concepts and guidance derived from practice outside the United States are introduced. Management strategies and guidance for developing a Plan of Action for scour critical bridges are outlined, and guidance is provided for scour monitoring using portable and fixed instrumentation