April 20, 2020  —  May 17, 2020


Online - Course

Contact Hours



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.  Over a 4-week period, 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 4 weeks, 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.

Each week, a new module will be released, including a recorded lecture, quiz, discussion forum and homework assignment. You will have 7 days to review the lecture and complete the weekly assignments. The instructor will be available by email and phone for questions and comments during the class and will be interacting with students through the weekly discussion forum. The 4-week class will take approximately 6-8 hours to complete over the 4-week period.


Topic Headings for each of the 4 Weekly 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

Mr. Catlett brings over 25 years of experience in urban drainage and stormwater management.  As a member of the American Concrete Pipe Association, he has designed, specified, manufactured and installed both flexible and rigid pipe systems. He provides education and technical assistance on proper installation of storm drainage products to contractors, consultants, local agencies and state DOTs.  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

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.

Don't have access to a computer?
to get a paper registration form (PDF). Print it out, complete it, and email, mail or FAX it to our office following the instructions on the form. Include your check or government purchase order with your registration form. Please note that emailed or faxed-in registration forms will be considered as a "provisional booking" until payment is received. For more information, call our office at (434) 982-2897, fax at (434) 982-2856 or email uva-tta@virginia.edu