Transportation Learning Network

Virtual Learning

Culvert Inspections, Rehab & Failures - Part 3 or 3

  • Nov 9, 2023
    Virtual Learning (desktop/laptop and mobile devices)

The above opportunity and more can be accessed by visiting the TLN Learning Management System (LMS).


This is part 3 of 3 in the Culvert Hydraulics Series. In this presentation, we will discuss principles of culvert inspections, inspection procedures and recognize criteria impacting decisions to rehab or replace, as well as common methods of culvert repair work. We will then take a look at some failure case studies and how these were remedied.


Dylan Armstrong, PE, is a Hydraulic Engineer with Ayers Associates, Inc in Fort Collins, CO. Dylan specializes in hydraulics engineering, stream rehabilitation, and river mechanics. Dylan has worked on a diverse range of projects including the planning, analysis, design, project management and construction administration for water resource and civil projects. He has extensive engineering project skill experience including GIS, 1D and 2D hydraulic modeling, floodplain permitting, scour calculations, scour countermeasure and design, culvert design, bridge design, hydraulic structure design, dam investigations, flow monitoring, field assessments, habitat analyses, AutoCAD design, stream rehabilitation and river corridor grading, bankfull discharge analyses, hydrologic analyses, and technical report writing. Dylan is a certified FHWA NHI instructor and regularly teaches the Culvert Deign course. Dylan received his Bachelor and Master of Science Degree in Civil Engineering from Colorado State University. He is a registered engineer in Colorado, Wyoming and Washington state.

Matthew Hickox, PE, CFM, Ayers Associates, Inc. Matthew brings his experience and expertise in transportation hydraulics, including urban drainage design, culvert design, scour analysis and counter-measure design, complex hydraulic analyses, floodplain mapping and compliance, and stream restoration, to every project. His experience is founded on a solid understanding of hydrology, 1-, 2- and 3-dimensional hydraulic modeling, in-stream hydraulic structures, scour protection measures, culvert and bridge hydraulics, and the regulatory environment for stormwater projects. He has successfully applied this knowledge to support projects that include the interaction of people and infrastructure with water. Matthew enjoys using his experiences and expertise to enhance his role as an engineer at local, state and federal levels. He firmly believes in passing his knowledge and experiences on to other engineers, helping to further the state of practice.

Target Audience

Hydraulics, Design, Maintenance, Bridge, Construction, and any other staff involved in culvert design, selection, installation and maintenance.