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October Meeting - Delaware I-495 Bridge Emergency Evaluation and Repair - October 5th, 2016

posted Sep 22, 2016, 5:20 AM by Charles Mitchell   [ updated Sep 30, 2016, 5:56 AM ]
Join us for our October meeting where we will have a presentation on the Delaware I-495 Bridge Emergency Evaluation and Repair. 

Presentation Synopsis:

The 38-span parallel bridge supporting I-495 over the Christina River in Wilmington, DE was closed to traffic on June 2, 2014 due to serious substructure settlement and lateral displacement of the existing pile foundations which resulted in gross deformation of the superstructure and insufficient live load carrying capacity. The bridge closure affected over 90,000 daily motorists and impacted the flow of goods to and from the nearby Port of Wilmington.

A team, composed of DelDOT, FHWA, AECOM and J.D. Eckman, was assembled by June 3, 2014 to restore the bridge to service as soon as possible to minimize traffic disruptions. Traffic was restored on the southbound structure in 59 days and full traffic returned to the bridge in 83 days. The presentation provides an overview of the operational, design and construction challenges encountered in handling this emergency including:  the initial and long term operational responses; early structural and geotechnical investigations; assessment of the geotechnical and structural failures; and the critical decisions that framed the selected intermediate and permanent repair methods. The presentation will highlight the lessons learned and results of the fast-paced design and construction to restore the bridge to service over a month ahead of schedule. 


Speaker Biographies:

John Milius has over 20 years of experience in design and construction of a wide range of structures. John is accomplished in the assessment, analysis and design of complex highway and railroad bridges in support of new bridge design and innovative bridge rehabilitation projects. John has written and presented numerous technical papers for industry publications and conferences. John currently serves as the Structures Department Manager for AECOM Pennsylvania operations. John holds a Bachelor of Science in Civil Engineering from Bucknell University, a Masters of (Structural) Engineering from Cornell University, and a MBA from Villanova University.

Paul Moffitt, III, has practiced for over 26 years as a geotechnical engineer and currently serves as a Senior Geotechnical Engineer with AECOM's Transportation Business Unit in the Northeast Region. Paul has had the pleasure of working on various transportation and facilities design projects over his more than six years with AECOM. Prior to AECOM, Paul worked for eight years as the Assistant Chief Geotechnical Engineer for PennDOT in the Geotechnical Section at the Materials and Testing Division. Prior to PennDOT, Paul worked as a consultant geotechnical engineer for various firms in the Central PA region. He has gained valuable experience working on design, construction and emergency response projects throughout the Mid-Atlantic region in both the public and private sectors.

Meeting Date
October 5, 2016

Engineer's Club of Baltimore
11 West Mount Vernon Place
Baltimore, MD 21201

Dress Code
Jacket Required, Tie Optional

Meeting Schedule (approximate)
Social Hour from 5:15 to 6:15pm 
Dinner 6:15 to 7:15pm 
Speaker Beginning at 7:15pm

Cost & How to Register
$45 per person / $15 students. Credit Card & Paypal Only
Reservations are due by 4pm on Thursday September 29. Payment is exclusively via PayPal.