CTP Information Exchange Webinar: Culverts – Safety Grates and Mitigation Efforts

Topic: Culverts – Safety Grates and Mitigation Efforts

FREE Webinar !!

CFMs and AICPs are eligible for 1 CEC/1CM for this training*

Storm Drains Keep Swallowing People During Floods – this was the title of a recent ProPublica that told stories of several people that have drowned and disappeared into storm drains during floods and said the problem should be easy for federal, state, and local government agencies to fix but that it keeps happening. Mile High Flood District (MHFD) partnered with Colorado State University (CSU), AECOM, and the Larimer County Dive Rescue Team (LCDRT) to develop specific design guidelines for safety grates. The study put first responders in a flume at the CSU Hydraulics Laboratory to evaluate maneuverability at a 48-inch culvert inlet protected by multiple safety grate configurations. Qualitative evaluations and measured flow velocities were recorded for each test and compared to numerical solutions from 3-D Computational Fluid Dynamics (CFD) models completed by AECOM. CFD models were then used to identify optimal safety grate configuration options. Prototype testing of the recommended design configuration, coupled with LCDRT responder’s evaluation, provided clear design guidance for safety grate configuration and design criteria for future designs. 

This webinar will also provide information on efforts to improve culvert resilience.

November 9th from 1-2:30 p.m. ET (7-8:30 a.m. HST)


  • Holly Piza, P.E., D. WRE, Research and Development Director at MHFD
  • Christopher Thornton, PhD, P.E., Dir – Colorado State University Hydraulics Laboratory
  • Darryl Rockfield, P.E., CFM, Missouri State EMA
  • Brooke Seymour, P.E., CFM, Planning and Floodplain Management Director at MHFD
  • Dakota Fisher, AICP, Community Planner, FEMA


  • Webinar Logistics – Kevin Currie, ASFPM
  • Introduction – Alan Lulloff
  • Culvert Safety Grates – Holly Piza and Chris Thornton
  • Missouri Transportation Crossing Improvements – Darryl Rockfield
  • Mile High Crossing Improvements – Brooke Seymour
  • Flood Hazard Mitigation – Dakota Fisher

* There is a 1,000 person capacity for this free webinar.

Certified Floodplain Managers and Certified Planners are eligible for one continuing education credit (1 CEC) for taking this training.

  • You must indicate you are a CFM or AICP when you register and join with the individualized link sent by the webinar software.
  • Eligibility for CEC is dependent on your participation and time spent viewing the webinar, as determined by the webinar software.
  • Attending this training in a group setting or only viewing the recording is not eligible for CEC.

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