Hydraulics Design Manual -01

The Hydraulics Design Manual, or HDM, provides policies, practices and procedures used by the Oregon Department of Transportation for the hydraulic design of highway facilities.

The HDM presents engineering information based on established ODOT practices for highway drainage projects. Sound engineering judgment remains a vital part in the process of applying the design criteria in this manual to individual projects.

Chapter 1 - Introduction

Appendix A - Hydraulic Design Deviation Form

Appendix A - Preliminary Hydraulic Recommendations Example

Appendix B - Hydraulics Report Example

Appendix C - Drainage, Storm Drainage, Water Quality and Detention Basin Design Documentation Developers

Appendix D - Operation and Maintenance Manual Examples

Plate 1 - Example Cross-section of Proposed Bridge

Plate 2 - Example Culvert Elevation View Drawing

Plate 1 - Plan and Profile for Storm Drain Example Problem

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

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

Appendix A - Hydraulic Roughness (Manning's n) Values of Conduits and Channels

Appendix B - Hydraulic Properties of Conduits

Appendix A - Culvert Performance Charts

Appendix B - Culvert Design Sheet

Appendix C - Debris-control Structures

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

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

Contact the Hydraulics Engineering Program

4040 Fairview Industrial Drive SE, MS 5

Salem, Oregon 97302