June 08, 2023


7:45 AM EST - 4:00 PM EST

Contact Hours


Location Online - Course

This hybrid online class will combine both live instruction and independent online work that you will complete during the day.  Independent work will include quizzes, readings, videos and short assignments.  Access to a computer with a webcam (either a camera that is built into your laptop or one that connects via USB), a reliable internet connection and a workspace that is free from distraction and noise will set you up for success.


A properly installed pipe should remain in service for 50 to 100 years with little or no repair. The instructor has documented installation practices for both flexible and rigid pipe at the local and state level. The focus of this class remains on promoting a solid understanding of installation, specifications, design requirements and material differences for pipe systems. Empower your staff with the ability to properly inspect, design, install and accept both flexible and rigid pipe systems.

Join instructor, Walt Catlett for this lively online class and discussion forum that will change the way you think about installing storm drainage pipe.  During the day, you will learn more about pipe fundamentals, soil gradation and compaction, excavation, bedding, joining pipe, backfilling and testing of storm drainage pipe.  You will learn common crew tasks implemented during the installation and inspection of a properly installed storm drainage pipe.  By the end of the day, you will have challenged your current perceptions on pipe installation, identified risks associated with pipe installation and ways to mitigate those risks, learned proper density  testing requirements and learned how to recognize proper installation techniques.


Topic Headings for each of the 4 Modules

Pipe Fundamentals / Soil Basics – Gradation and Compaction

  • Overview of flexible and rigid pipe characteristics
  • Discussion on gradation and compaction of soils
  • Task: Review AASHTO’s Standard Installation Classifications

Trench Fundamentals / Safety

  • Overview of trench components
  • Review of trench safety practices
  • Task: Review VDOT’s “Allowable Pipe Criteria” standard drawing and Height Fill Tables

Installation Procedures / Bedding and Backfill / Joining Pipe

  • Techniques/steps for proper installation of storm drainage pipe
  • Identifying the different AASHTO joint classification and their proper application
  • Task: Review VDOT’s standards for storm drainage pipe and identify restrictions for pipe options

Backfill Density Testing / Post Installation Inspection

  • Techniques/steps for proper density testing for various storm drainage products
  • Identifying the different techniques for inspecting storm drainage pipe after installation
  • Task: Identify when installed pipe should be rejected or repaired. Calculate proper density requirements for storm drainage products per VDOT requirements


Walter C. Catlett

Walt Catlett possesses over 25 years of experience in urban drainage and stormwater management, combined with over 30 years of safety experience from the concrete pipe industry, military, and consulting engineering.  He is an effective trainer and educator responsible for the training of military personnel and public works professionals.  He serves on Virginia’s Local Transportation Assistance Program (LTAP) Advisory Board. He also serves on the Arkansas Department of Transportation’s Research Advisory Council. He has a B.S. in Civil Engineering from Texas A&M University in College Station, TX and a Master of Strategic Studies from the U.S. Army War College in Carlisle Barracks, PA.  Mr. Catlett served in the United States Marine Corps and United States Army Reserves for a combined 30 years.

Who Should Attend

This class was developed for inspectors, installers and design engineers alike. Previous experience with storm drainage pipe installation is not required. Inspectors, installers, engineers, planners, equipment operators, and laborers will learn techniques critical to the successful installation and inspection of storm drainage pipe systems ensuring they contribute to any agency’s transportation asset and management program.

Registration and Payment

The following registration fees cover the session, all course materials and meals:

Local Government: $75.00
State/Federal: $125.00
Private Industry: $300.00
Tribes: $0

Click here for UVA TTA's general registration information, cancellation policy, and refund policy. UVA TTA accepts the following credit cards: American Express, VISA, MasterCard, and Discover. Credit card information cannot be taken over the phone. Alternatively, after registering you can print out a voucher to send in with your payment. After you have completed the transaction you will receive an automatically generated email confirming registration and payment if applicable. Final confirmation and instructions will be sent out during the week prior to the class date.