Transcription of Chapter 8 Hydraulics - wisconsindot.gov
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Chapter 8 Hydraulics - wisconsindot.gov
WisDOT Bridge Manual Chapter 8 Hydraulics July 2018 8-1 Table of Contents Introduction .. 4 Objectives of Highway Drainage .. 4 Basic Policy .. 4 Design Frequency .. 4 FHWA Directive .. 5 DNR-DOT Cooperative Agreement .. 5 DOT Facilities Development Manual .. 5 Hydraulic Site Report .. 5 Hydraulic Design Criteria for Temporary Structures .. 5 Erosion Control Parameters .. 6 Bridge Rehabilitation and Hydraulic Studies .. 6 Hydrologic Analysis .. 7 Regional Regression Equations .. 7 Watershed Comparison .. 7 Flood Insurance and Floodplain Studies .. 7 Natural Resources Conservation Service .. 8 Hydraulic Design of Bridges .. 9 Hydraulic Design Factors .. 9 Velocity .. 9 Roadway Overflow .. 9 Bridge Skew .. 9 Backwater and High-water Elevation .. 9 Freeboard .. 10 Scour .. 11 Design Procedures .. 11 Determine Design Discharge .. 11 Determine Hydraulic Stream Slope .. 11 Select Floodplain Cross-Section(s).
Appendix 8-A. Plan survey datum must conform to datum in use by local zoning authorities. In most cases elevations are referenced to the National Geodetic Vertical Datum (NGVD) of 1929, or to the North American Vertical
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