2012PDFTech Reporthttp://www.fhwa.dot.gov/engineering/hydraulics/pubs/12026/hif12026.pdfFHWA-HIF-12-026DTFH61-06-D-00010Aquatic lifeDesign chartsCulverts--Design and construction--Handbooks, manuals, etcRoad drainage--Handbooks, manuals, etcHydraulic engineering--Handbooks, manuals, etcCulverts--Maintenance and repair--Handbooks, manuals, etcUnited StatesUnited States. Federal Highway AdministrationSchall, James D. (James Douglas)Ayres Associates; United States. Federal Highway Administration. Office of Bridge Technology; National Highway Institute (U.S.)Federal Highway AdministrationThis third edition is the first major rewrite of HDS 5 since 1985, updating all previous information and adding new information on software solutions, aquatic ...