Chapter 1 Design Policy
1-1 Introduction to Hydraulics
1-2 Responsibility
1-3 Hydraulic Reports
1-3.1 Hydraulic Report Types
1-3.2 Preparing a Stormwater and Drainage Hydraulic Report
1-3.3 Hydraulic Report Submittal and Archiving
1-3.4 Hydraulic Report Revisions and Supplements
1-3.5 Hydraulic Reports and Design-Build Projects
1-3.6 Developers and Utility Agreements
1-3.7 Upstream and Downstream Analysis
1-3.8 Existing Stormwater Drainage Conveyance System
1-4 Storm Frequency Policy and Design Tools and Software
1-5 Hydraulic Report Review Schedule
1-5.1 Hydraulic Milestones and Scheduling
Chapter 2 Hydrology
2-1 Introduction to Hydrology
2-2 Selecting a Method of Hydrology
2-3 Drainage Basin
2-4 Site Basins
2-5 Cold Climate Considerations
2-5.1 Calculating Snowmelt
2-5.2 Additional Considerations
2-6 Rational Method
2-6.1 General
2-6.2 Runoff Coefficients
2-6.3 Time of Concentration
2-6.4 Rainfall Intensity
2-7 Single-Event Hydrograph Method: Santa Barbara Urban Hydrograph
2-7.1 Design Storm Hyetograph
2-7.2 Runoff Parameters
2-8 Continuous-Simulation Hydrologic Model (Western Washington Only)
2-8.1 Modeling Requirements
2-9 Published Flow Records
2-10 USGS Regression Equations
2-11 Existing Hydrologic Studies
2-12 Examples of Hydrology
2-13 Appendices
Chapter 3 Culvert Design
3-1 Introduction to Culvert Design
3-2 Culvert Design Documentation
3-2.1 Hydraulic Reports to Culvert Design
3-2.2 Required Field Data to Culvert Design
3-2.3 Engineering Analysis to Culvert Design
3-3 Hydraulic Design of Culverts
3-3.1 Culvert Design Considerations
3-3.2 Allowable Headwater to Culvert Design
3-3.3 Tailwater Conditions to Culvert Design
3-3.4 Flow Type to Culvert Design
3-3.5 Velocities in Culverts: General
3-3.6 Culvert Hydraulic Calculations Form
3-3.7 Computer Programs to Culvert Design
3-3.8 Example to Culvert Design
3-4 Culvert End Treatments
3-4.1 Projecting Ends of Culvert Design
3-4.2 Mitered End Sections Culvert Design
3-4.3 Flared End Sections Culvert Design
3-4.4 Headwalls Culvert Design
3-4.5 Wing Walls and Aprons
3-4.6 Improved Inlets Culvert Design
3-4.7 Energy Dissipators Culvert Design
3-4.8 Culvert Debris Culvert Design
3-5 Miscellaneous Culvert Design Considerations
3-5.1 Multiple Culvert Openings
3-5.2 Camber Culvert Design
3-5.3 Horizontal and Vertical Angle Points Culvert Design
3-5.4 Upstream Ponding Culvert Design
3-5.5 Miscellaneous Design Considerations: Siphons Culvert Design
Chapter 4 Open-Channel Flow
4-1 Introduction to Open-Channel Flow
4-2 Uniform Flow Calculations
4-3 Field Slope Measurements
4-4 Roadside Ditch Design Criteria
4-5 Critical Depth
4-6 Manning’s Roughness Coefficients (n)
4-7 Countermeasures for Stream Instability
4-7.1 Bank Protection
4-7.2 Rock for Bank Protection
4-7.3 Channel Stabilization
Chapter 5 Drainage of Highway Pavements
5-1 Introduction
5-2 Hydrology
5-3 Highway Drainage
5-3.1 Bridge Deck and Downstream End Drainage
5-3.2 Slotted Drains and Trench Systems
5-3.3 Drop Inlets
5-4 Gutter Flow and Inlet Spacing
5-4.1 Capacity of Inlets on a Continuous Grade
5-4.2 Capacity of Inlets at Sag Locations
5-5 Drainage Structures
5-5.1 Inlet Structure Types
5-5.2 Grate Types
5-6 Scupper Barrier
5-7 Hydroplaning and Hydrodynamic Drag
Chapter 6 Storm Sewer
6-1 Introduction
6-2 Design Criteria
6-3 Data for Hydraulic Reports
6-4 Storm Sewer Design: Manual Calculations
6-5 Storm Sewer Design: Computer Analysis
6-6 Hydraulic Grade Line
6-7 Drywells
6-8 Pipe Materials for Storm Sewers
6-9 Subsurface Drainage
Chapter 7 Water Crossings
7-1 Introduction
7-2 Existing Conditions
7-2.1 Reference Reach
7-2.2 Bankfull Width
7-2.3 Watershed and Land Cover
7-2.4 Geology and Soils
7-2.5 Fluvial Geomorphology
7-2.6 Flood Risk Assessment
7-2.7 Hydrology
7-3 Hydraulic Analysis
7-3.1 Tidal Crossings
7-4 Design
7-4.1 Determining Crossing Design Methodology for Documentation
7-4.2 Constraints
7-4.3 Channel Alignment
7-4.4 Channel Cross Section
7-4.5 Hydraulic Opening
7-4.6 Vertical Clearance
7-4.7 Buried Structures
7-4.8 Sediment
7-4.9 Total Scour
7-4.10 Lateral Migration for Water-Crossing Structures
7-4.11 Channel Complexity
7-4.12 Scour Countermeasures
7-4.13 Landscaping/Planting
7-5 Other Design Methods
7-5.1 No-Slope Design
7-5.2 Fish Passage Improvement Structures
7-5.3 Tidal Crossing Structures
7-6 Structure-Free Zone
7-7 Temporary Stream Diversions
7-8 Monitoring
7-8.1 Streambed Camera Monitoring
7-9 Performance Management
7-10 Additional Resources
7-11 Appendices
Chapter 8 Pipe Classifications and Materials
8-1 Introduction
8-2 Pipe Classifications
8-2.1 Drain Pipe
8-2.2 Underdrain Pipe
8-2.3 Culvert Pipe
8-2.4 Storm Sewer Pipe
8-2.5 Sanitary Sewer Pipe
8-3 Pipe Materials
8-3.1 Concrete Pipe
8-3.2 Metal Pipe: General
8-3.3 Thermoplastic Pipe: General
8-4 Pipe Corrosion Zones and Pipe Alternative Selection
8-4.1 Corrosion Zone I
8-4.2 Corrosion Zone II
8-4.3 Corrosion Zone III
8-5 Corrosion
8-5.1 pH
8-5.2 Resistivity
8-5.3 Corrosion Control Methods
8-6 Abrasion
8-7 Pipe Joints
8-8 Pipe Anchors
8-8.1 Thrust Blocks
8-9 Pipe Rehabilitation: Trenchless Technology
8-9.1 Trenchless Techniques for Pipe Rehabilitation
8-10 Pipe Design
8-10.1 Categories of Structural Materials: Rigid or Flexible
8-10.2 Structural Behavior of Flexible Pipes
8-10.3 Structural Behavior of Rigid Pipes
8-10.4 Foundations, Bedding, and Backfil
8-11 Abandoned Pipe Guidelines
8-12 Structural Analysis and Fill Height Tables
8-12.1 Pipe Cover
8-12.2 Shallow Cover Installation
8-12.3 Fill Height Tables
Chapter 9 Highway Rest Areas
Chapter 10 Woody Material
10-1 Introduction
10-1.1 Purpose and Need
10-1.2 Guidance for Emergency Large Woody Material Placement
10-1.3 Design Oversight
10-2 Design Process
10-3 Reach Assessments
10-4 Recreational Waters Safety Assessment
10-5 Project Objectives
10-6 General Design Criteria
10-6.1 Design Life
10-6.2 Wood Selection
10-6.3 Design Flow
10-6.4 Placement
10-6.5 Stability and Anchoring
10-6.6 Scour
10-6.7 FEMA Floodplain and Floodways
10-6.8 Recreational Safety in Navigable Waters
10-7 Project-Specific Design Criteria
10-7.1 Bridge Scour and Bank Stabilization
10-7.2 Stream Habitat Restoration
10-7.3 Wood for Aquatic Habitat Design Process
10-8 Mobile Woody Material
10-8.1 Design Criteria
10-8.2 Design Flows for Mobile Woody Material
10-9 Small Woody Material and Slash
10-9.1 Benefits of Using Small Woody Material and Slash
10-9.2 Design of Small Woody Material/Slash
10-10 Inspection and Maintenance
10-11 Appendices
Glossary and Sources
Abbreviations
Main Glossary of Terms
Sources