Hydraulics Design Manual

Hydraulic Design Manual Icon The Hydraulics Design Manual (HDM) provides policies, practices and guidance used by the Oregon Department of Transportation for the hydraulic design of highway facilities.

Full Manual - Hydraulics Design Manual

Appendixes

Appendix A - Hydraulic Design Deviation Form

Plate 1 - Plan and Profile for Storm Drain Example Problem

Appendix A - Rainfall Intensity - Duration - Recurrence Interval Curves

Plate 1 - Rainfall IDR Curve Zone

Plate 1A - Rainfall IDR Curve Zone with Mile Points

Plate 1 - Northwest Flood Region Boundary

Plate 2 - Mean Annual Precipitation in Easter Oregon

Oregon Engineering Handbook

Urban Hydrology for Small Watersheds

Appendix H - Oregon 24-Hour Precipitation Maps

Plate 7 - 1,000-Year, 24-Hour

Appendix I - 2-Year, 7-Consecutive Day Low Flows

Table 2 - 2-Year, 7-Consecutive Day Low Flow Discharges for Eastern Oregon