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Search for courses based on delivery type, program area, or topic below, or find upcoming trainings in your state or territory. For more information on trainings from the National Highway Institute, contact us.

Course Description

Culvert Hydraulic Analysis and Design Program (HY-8) Web-Based

PROGRAM AREA: Hydraulics
Web-based Training (WBT)Web-based Training (WBT)
Calendar Year
2 Hours
0.2 Units
$0 Per Participant



NHI web-based Training Course 135094, Culvert Hydraulic Analysis and Design Program (HY-8), provides training on the use of the Federal Highway Administration's (FHWA) HY-8 computer program to complete culvert analysis and design calculations commonly performed by Civil Engineers and others involved in roadway design.

This web-based training uses a combination of text, graphics, examples, animations, and workshop problems in its six primary lessons:

HY-8 Overview

Conventional Design Scenarios

Rehabilitative Linings/Common Pitfalls in the Use of HY-8

Special Geometries

Energy Dissipation

Project File Management and Report Generation

Upon completing the course, participants will be able to apply the HY-8 software to analyze and design culverts in many commonly encountered situations.

Note: NHI 135094, Culvert Hydraulic Analysis and Design Program (HY-8) (Web-Based) is a prerequisite for Course 135080, Hydrologic Analysis and Modeling with WMS. Mastery of the concepts covered in this WBT is important to successful completion of Course 135080.


Upon completion of the course, participants will be able to:

  • List the primary capabilities of HY-8
  • Identify inlet and outlet control situations from the culvert summary tables
  • List the material types used in culverts
  • List the material shapes that may be analyzed within HY-8
  • Select a culvert from a list of available culverts that satisfies headwater and outlet velocity criteria by using HY-8.
  • Predict the effect of lining material (new or rehabilitated) on headwater
  • Identify common pitfalls in using HY-8 in conventional design scenarios
  • Identify situations appropriate for application of special culvert geometries
  • Identify situations requiring energy dissipation to mitigate scour or high outlet Velocities.
  • Select an appropriate energy dissipator by using HY-8.
  • Identify the steps to generate customized HY-8 reports.


The target audience is comprised of federal, state, and local hydraulic engineers, highway designers and design consultants who have responsibility for the analysis, design, and review of culverts. Length of service with an organization or status within an organization would not be a factor in that this training could apply to anyone that has a need for hands-on use of HY-8.

If you have questions about this NHI training, please contact NHI at or 877.558.6873.


NHI 135094, Culvert Hydraulic Analysis and Design Program (HY-8) (Web-Based) is a prerequisite for Course 135080, Hydrologic Analysis and Modeling with WMS. Mastery of the concepts covered in this WBT is important to successful completion of Course 135080.

The National Highway Institute (NHI) has been accredited as an Accredited Provider by the International Association for Continuing Education and Training (IACET). In obtaining this accreditation, NHI has demonstrated that it complies with the ANSI/IACET Standard which is recognized internationally as a standard of good practice. As a result of their Accredited Provider status, NHI is authorized to offer IACET CEUs for its programs that qualify under the ANSI/IACET Standard.


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For questions, concerns, technical issues or for more information, please contact Customer Service at:

800-624-1373 (Toll free, Option #2)

216-579-2112 (Option #2)

Hours are Monday - Friday, 7:00 AM - 7:00 PM ET.

To pay by check, mail a copy of your invoice and a check made payable to the Federal Highway Administration to:
6500 S. MacArthur Blvd
Oklahoma City, OK 73169


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