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Technical Meeting


January 20, 2022: Emergency Repairs of the Hernando de Soto Bridge

February 15, 2022: I-95 Express Toll Lanes Landslide Stabilization (Joint meeting with DVGI)

March 24, 2022: Bridge Aesthetics and Architecture with Bridgescape LLC

March 2022: College Event

April 2022: (Joint Meeting with ASCE)

May 2022: TBD


Date & Time:

Thursday, January 20th, 2022

12:00 PM to 1:00 PM


Emergency Repairs of the Hernando de Soto Bridge


Webinar – Link will be sent to registrants

Register for this month's meeting HERE!


$10 - Members and Non-Members

FREE - Government Employees and Students



On May 11, 2021, Michael Baker International (MBI) discovered a critical fracture in the tie girder of the I-40 Hernando de Soto Bridge requiring immediate closure of the bridge for both vehicular traffic on and maritime traffic below the bridge. Michael Baker's design team worked expeditiously alongside the contractor, Kiewit Construction, to implement a three phased repair scheme to temporarily stabilize the structure, strengthen the fractured tie girder under post-tensioning, and address similar defects within the bridge as a result of non-destructive testing findings. The presentation will cover all three phases as well as the recently released findings of the forensic investigation of the fractured tie girder section.


Gregory Dunn, PE:

Gregory Dunn is an Associate Senior Bridge Engineer at Michael Baker International with over 12 years of structural engineering experience inspecting, designing, and analyzing complex structures with a strong emphasis on bridges. Notable local projects include the Roosevelt Boulevard Wayne Junction Viaduct Rehabilitation, the Vince Street Expressway Overhead Bridge Replacements, and the Relocation of North Valley Road at the Paoli Transportation Center. National projects include the I-285/SR400 Interchange in Atlanta, GA, Transform 66 Outside the Beltway near Washington D.C., and the PR-2 Bridge in Puerto Rico as part of the Rio De La Plata Flood Control Project with the USACE. He served as a lead designer for all three repair phases on the Hernando De Soto Bridge and performed on-site monitoring during the post-tensioning operations.

Frank Russo, PE:
Frank Russo is Founder & Principal of Russo Structural Services having previously served 11 years with Michael Baker International, most recently as National Technical Director. Frank was engineer-in-charge of the repair designs for the Hernando De Soto Bridge and has previously led similar efforts for projects like the PA Turnpike Delaware River Bridge, the Sherman Minton Bridge over the Ohio River, and others. An expert in bridge design and rehabilitation, Frank provides engineering services nationwide and is based in the Philadelphia suburbs.

Alexandra DiMino, E.I.T.:
Alexandra DiMino is a structural designer at Michael Baker International with a years' experience of structural design engineering. Notable projects include the relocation of North Valley Road at the Paoli Transportation Center and the PR-2 Bridge in Puerto Rico as part of the Rio De La Plata Flood Control Project with USACE. She provided engineering support for repair phase three of the Hernando De Soto Bridge.


Please email “phillysei+meeting”<at>”gmail”<dot>”com”


September 2021: Pay Now or Pay Later: Using a Risk-Informed Mindset for Site Investigation Decisions

October 2021: BIM for Bridges: A Process Overview

December 2021: CN Rainy Lake Bascule Span Rehab

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