Hydraulics Manual

Various types of drainage facilities are required to move water under, along or away from a highway. These facilities must be economical and efficient, as well as possess the capacity to do so without damaging the highway or endangering motorists.

The Hydraulics Manual provides hydrologic and hydraulic analysis procedures for most situations encountered in highway design.

Please contact the Hydraulics Engineering Unit should a situation arise that is not described in this manual. Requesting assistance as soon as questions or problems arise is highly encouraged, as it will allow for the time needed to develop a satisfactory solution and likely reduce the amount of redesign needed.

Hydraulics Design Manual, 2014 (91 MB)

• Cover Page 
• Preface
  
• Chapter 1 - Introduction
• Chapter 2 - Legal Aspects
• Chapter 3 - Policy
• Appendix A - Hydraulic Design Deviation Form
• Chapter 4 - Documentation
• Appendix A - Preliminary Hydraulic Recommendations Example
• Appendix B - Hydraulics Report Example
• Appendix C - Pavement Drainage, Storm Drainage, Water Quality and Detention Basin Design Documentation for Developers or Non-ODOT Projects
• Appendix D - Operation and Maintenance Manual Examples
• Plate 1 - Example Cross-section of Proposed Bridge
• Plate 2 - Example Culvert Elevation View Drawing
• Chapter 5 - Pipe Materials
• Plate 1 - Plan and Profile for Storm Drain Example Problem
• Chapter 6 - Data Collection
• Appendix A - Streambed Material Analysis Methods
• Appendix B - Topographic Data Required for Bridge Backwater Analysis
• Appendix C - Topographic Data Required for Culvert Analysis
• Appendix D - Culvert Inspection Form
• Appendix E - Topographic Data Required for Stormwater Analysis
• Appendix F - Storm Drain Pipe Inspection Form
• Chapter 7 - Hydrology
• Appendix A - Rainfall Intensity - Duration - Recurrence Interval Curves
• Plate 1 - Rainfall IDR Curve Zone
• Plate 1a - Rainfall IDR Curve Zone with mile points
• Appendix B - U.S. Geological Survey Regression Equations for Rural Western Oregon
• Appendix C - U.S. Geological Survey Regression Equations for Urban and Rural Eastern Oregon
• Appendix D - U.S. Geological Survey Regression Equations for Arid Regions of Rural Eastern Oregon
• Plate 1 - Northwest Flood Region Boundary
• Plate 2 - Mean Annual Precipitation in Eastern Oregon
• Appendix E - U.S. Geological Survey Nationwide Urban Regression Equations
• Appendix F - Rational Method
• Appendix G - Natural Resources Conservation Service Unit Hydrograph Method
• Oregon Engineering Handbook
• Urban Hydrology for Small Watersheds
• Appendix H - Oregon 24-hour Precipitation Maps
• Plate 1 - 2-year, 24-hour
• Plate 2 - 10-year, 24-hour
• Plate 3 - 25-year, 24-hour
• Plate 4 - 50-year, 24-hour
• Plate 5 - 100-year, 24-hour
• Plate 6 - 500-year, 24-hour
• Plate 7 - 1,000-year, 24-hour
• Appendix I - 2-year, 7-Consecutive Day Low Flows
• Plate 1 - Boundary Between Western and Eastern Oregon
  
• Plate 2 - Normal Annual Precipitation 1930-1957 State of Oregon
• Plate 3 - Mean Minimum Temperature, January in Western Oregon
• Table 1 - 2-year, 7-Consecutivie Day Low Flow Discharges for Western Oregon
• Table 2 - 2-year, 7-Consecutive Day Low Flow Discharges for Eastern Oregon
• Appendix J - Mean Daily Exceedance Discharges
• Appendix K - Maximum Predicted Discharge Based on Station Records and Envelope Curve
• Chapter 8 - Channels
• Appendix A - Hydraulic Roughness (Manning's n) Values of Conduits and Channels
• Appendix B - Hydraulic Properties of Conduits
• Chapter 9 - Culverts
• Appendix A - Culvert Performance Charts
• Appendix B - Culvert Design Sheet
• Appendix C - Debris-control Structures
• Chapter 10 - Bridges
• Chapter 11 - Energy Dissipaters
• Chapter 12 - Storage Facilities
• Chapter 13 - Storm Drainage
• Appendix A - Pavement Drainage
• Appendix B - Gutter Flow
• Appendix C - Inlets
• Appendix D - Inlet Capacity and Spacing
• Appendix E - Access Structures
• Appendix F - Storm Drains
• Appendix G - Hydraulic Grade Lines
• Appendix H - Design Charts
• Chapter 14 - Water Quality
• Appendix A - Low impact Development Approach
• Appendix B - Biofiltration Facilities
• Appendix C - Media Filtration Facilities
• Appendix D - Density Separation Facilities
• Appendix E - Stormwater Treatment Facility Components
• Appendix F - Oil Control Structures
• Chapter 15 - Bank Protection
• Chapter 16 - Trenchless Technology
• Chapter 17 - Field Markers
• Chapter 18 - Temporary Water Management
• Glossary