TRB Webinar: Limitations of the Infiltration Approach to Stormwater Management

August 15, 2019 02:00 PM - 03:30 PM U.S. Eastern
Cost (for your seat)
Professional Development Hours for this webinar
1.50 hour(s)
Continuing Education Hours for this webinar
AAE: 0.00 hour(s)
AICP: 0.00 hour(s)
CLE: 0.00 hour(s)

Stormwater management practitioners are invited to a TRB webinar on Thursday, August 15, 2019, from 2:00 PM to 3:30 PM ET. The webinar will provide guidance for determining appropriate siting and design of stormwater infiltration practices based on the limitations, risks, and benefits in the context of the built and natural environments. The practice of mitigating roadway runoff through infiltration has increased in recent years because of its ability to reduce stormwater volume, increase groundwater recharge, and reduce peak flows and pollutant transport. Some state departments of transportation are required to use infiltration practices for their roadway projects unless infiltration is proven infeasible. This webinar will address a broad range of issues associated with choosing and siting infiltration practices for mitigating roadway stormwater limitations, including effects of climate, soils, topography, geology, vegetation, and land use. Presenters will also discuss pollutants of concern on surface water and groundwater quality; effects on surface water and groundwater quantity; and conditions under which full, partial, and no or incidental infiltration would be feasible. They will also identify gaps in the body of knowledge and discuss options for improving the effectiveness and reducing risks.

This webinar was organized by the TRB Standing Committee on Stormwater.

Some registrants will need to pay $95 to attend this webinar.  Sign into to view registration information.

Webinar Presenters

  • Aaron Poresky, Geosyntec Consultants
  • Eric Strecker

Moderated by: Scott Taylor, Michael Baker International

Webinar Outline

  1. Overview of infiltration limitations and opportunities in the highway environment
  2. Overview of research results and guidance document
  3. Demonstration of spreadsheet tool
  4. Question and answer session

The first 60 minutes of the webinar will be for presentations and the final 30 minutes will be reserved for audience questions.

Learning Objectives

At the end of this webinar, participants will be able to:

  1. Describe the benefits and limitations of infiltration of stormwater
  2. Identify the specific technical limitations of infiltration within the highway right-of-way
  3. Describe potential groundwater impacts of stormwater infiltration
  4. Discuss how to improve the resiliency of infiltration design

 Professional Development Hour Information

A certificate for 1.5 Professional Development Hours (PDHs) will be provided to Professional Engineers (PEs) who register and attend the webinar as an individual. For approved webinars, TRB’s webinar program awards Registered Continuing Education Provider (RCEP) Professional Development Hour (PDH) credits associated with participation only to the registered individual and not to other members of a group that view the webinar together. To receive PDH credits, please register as an individual and sign into the webinar from your personal computer. After doing this, you may join your group in a meeting room.  To be eligible for the credits, individuals must remain signed in for the entire webinar, including for any question and answer session following the presentations.

In addition, advance registration is available until just before the webinar starts. Once the webinar starts, you will be unable to submit your registration. Individuals that are registered for a webinar but do not receive their confirmation emails due to their organization’s internal firewalls should contact the TRB Helpdesk ( for assistance in signing in.

Individuals registered as Florida PEs are no longer required to email TRB with your license number to report your attendance. Instead, please use your certificate that TRB provides through as verification of your attendance to the Florida Board of Professional Engineers.

Please check with your licensing board to ensure that TRB webinar PDHs are approved by your board.

This webinar was developed in March 2019. TRB has met the standards and requirements of the Registered Continuing Education Program (RCEP). Credit earned on completion of this program will be reported to RCEP by TRB. Complaints about registered providers may be sent to RCEP, 1015 15th Street, NW, 8th Floor, Washington, DC 20005. Website:

Registration questions? Contact Reggie Gillum at