Culvert Design and Inspection

By the end of this course, you will be able to:

• Apply basic hydrology and hydraulic principles to common culvert and drainage problems

• Assess how culvert design, condition, hydraulics, and service life affect infrastructure performance

• Review culvert inspection methods and identify key indicators of deterioration or risk

• Evaluate practical maintenance options for culvert assets

• Recognize relevant design, inspection, and regulatory considerations that affect culvert management

Description

Culverts play a critical role in protecting roads, properties, and communities from flooding, erosion, and drainage-related damage. When culverts are poorly designed, inadequately maintained, or misunderstood during inspection and review, the consequences can include service disruptions, avoidable repair costs, regulatory issues, and increased public safety risk.

As an engineer, technologist, inspector, reviewer, or infrastructure professional, you may be asked to assess culvert performance, review condition reports, support maintenance decisions, or understand whether a culvert is meeting its intended drainage function. These responsibilities require more than a basic awareness of drainage systems. They require a practical understanding of hydrology, hydraulics, inspection findings, service life, design limitations, and rehabilitation options.

This course provides a structured introduction to culvert design, installation, and inspection across the asset lifecycle. Through lectures, real-world examples, hands-on exercises, and problem-solving activities, you will build the foundational knowledge needed to review culvert performance, interpret inspection information, and support sound decisions related to maintenance, repair, risk, and regulatory compliance.

Who Should Attend

This course is designed for professionals who need a practical working knowledge of culverts, drainage systems, and related hydrotechnical concepts, including:

• Civil, municipal, mechanical, mining, and agricultural engineers

• Engineering technologists and technicians

• Infrastructure inspectors and field review personnel

• Managers and reviewers responsible for drainage or transportation assets

• Project engineers and municipal officials

• General contractors and drainage product manufacturers

• Property managers and directors of physical plants

• Professionals who are new to hydrotechnical engineering or seeking a practical refresher

Basic Hydrology-Refresher

• Introduction

• Review of drainage concepts and needs

Drainage Design Criteria

• Flood control risks, liability and the unknown effect of climate change

• Water quality control

• Erosion control

Rainfall Analyses

• Intensity-Duration-Frequency (IDF) data

• Historical storms

• Storm distribution in time

• Storm frequencies-the danger of extrapolation

• Design storms or floods-how to cope with lack of long and reliable data sets

Time of Concentration –Review of Design Equations, Charts and Their Limitations

• Bransby Williams equation

• Kirpich equation

• Airport formula

Workshop for Estimating Flows in Drainage Design

• Use of Rational Method for estimating design discharge

• Discussion of modelling and SWMM for estimating design discharge

• Use of Statistical analyses of observed data to estimate design discharge

Basic Hydraulics-Refresher

Open Channel Flow

• Basic laws of hydraulics

• Types of flows

• Manning's equation

• Roughness coefficients

• Stream erosion and threshold velocities

• Effect of urbanization on stream hydraulics

Design of Open Channels

• Manning’s equation

• Stable channels

• Composite channels

• Triangular channels and gutters

• Example Calculations and Exercises.

Design of Culverts and Bridge Openings

• Culverts, inlet and outlet control

• Use of design charts

• Inlet erosion protection

• Debris control

• Fish passage

Culvert Inspection and Estimation of Service Life

• Inspection requirements

• CS Corrosion

• Estimating CS Service Life

• Culvert Rehabilitation Options

Culvert Design Workshop

• Culvert Design Using Nomographs

• Culvert Design Using HY-8 Model

• Evaluation of existing culvert

Review and Conclusions

• Design objectives

• Design standards

• Liability and Risk