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October 4th General Meeting

posted Sep 21, 2016, 7:36 PM by robert miller   [ updated Sep 22, 2016, 3:31 PM ]
"Rehabilitation of Bridges 1 and 1A on Rising Sun Lane over Brandywine Creek"

Presented by James A. Guinther, P.E., DBIA
Vice President at Whitman, Requardt & Associates, LLP

Topic Description:
The Rehabilitation of Bridges 1 & 1A on Rising Sun Lane over Brandywine Creek in New Castle County, Delaware was one of the highest priority and most complex rehabilitation projects for Delaware Department of Transportation (DelDOT). Both bridges were in the state’s top ten structurally deficient bridges list. 

Bridge 1-001 (Bridge 1) is a single span steel Pratt through truss bridge carrying Rising Sun Lane over Brandywine Creek, and was ranked No. 7 on DelDOT’s list of structurally deficient bridges due to years of advancing deterioration and weakening of fatigue sensitive details. Bridge 1 is the last remaining truss of its kind in Delaware. The bridge was constructed in 1928 and rehabilitated several times throughout the years. The stone masonry abutments and wing walls predate the 1928 structure having been left in-place from a previous structure. 

Bridge 1-001A 279 (Bridge 1A)  is a stone arch just south of the Brandywine Creek on Rising Sun Lane and was ranked No. 1 on DelDOT’s list of structurally deficient bridges due to the advanced deterioration in the arch and spring walls. Bridge 1A was constructed in 1833 and rehabilitated in 1995. 

At the onset of the project, community meetings were held to inform the public of the condition of these structures and the need for repairs. As communication between the design team, resource agencies, and the community progressed, it became apparent that there was a strong interest in preserving these structures in their current configuration as an example of Delaware’s history. The project goals were to address structural deterioration and maintenance needs, and complete safety and drainage upgrades while maintaining as much of the historic materials and character as possible. 

Given the age of the structure, complex nature of the truss details, and limited access to critical areas of the truss prior to construction, a complete evaluation of the structure’s rehabilitation needs could not be performed prior to construction. Therefore, the design team was required to adjust the repair sequence to minimize impacts to the structural integrity of the truss system. The project’s success can be attributed to the design team’s attention to detail and thorough planning to ensure the successful implementation of the repairs and partnering between the entire project team throughout design and construction to complete a significant amount of work in a safe and timely manner. This rehabilitation project has preserved a part of Delaware’s history for years to come.

Presenter Bio:
Jim Guinther, PE, DBIA a Vice President with Whitman, Requardt & Associates, LLP in Baltimore, manages the design of various transportation projects, particularly design-build pursuits, and oversees the bridge design/inspection group. Mr. Guinther earned a Bachelor’s and Master’s Degree in Civil Engineering from Bucknell University and is a registered Professional Engineer. Jim has 19 years of transportation planning and design experience with an emphasis on structures. His work involves bridge replacement and rehabilitation projects, including a variety of structures ranging from timber, prestressed concrete beam, or steel girder bridges to trusses, retaining walls, and tunnels for federal, state, and local county agencies. In addition to his role as Project Manager for several desing-build projects, he is currently the lead structural engineering design manager responsible for the third party review oversight of the structural (horizontal and vertical construction) components for the $2.2 billion, 16-mile long Purple Line Light Rail P3 project. The project includes 40 major bridges/underpasses/culverts supporting pedestrian, light rail, and vehicular loads; over 70,000 linear feet of retaining walls; 17 noise walls; and two maintenance buildings/shops.

Evening Schedule:
Event Date: Tuesday, October 4th 
6:00 – 7:00 PM: Registration/Deli Buffet/Open Bar
7:00 – 8:00 PM: SEI Announcements and Presentation
8:00 – 8:15 PM: Q&A and Closing Remarks

Cost for this Event:
SEI-MD Member from Sponsored firm = $25
Non-member from sponsored firm = $30
Dues Paying SEI-MD Member from non-sponsored firm = $40
Non-member from non-sponsored firm = $45
Full-Time Students = FREE
Event Location:
The Engineers Society Of Baltimore (ESB)
Garrett-Jacobs Mansion
11 West Mount Vernon Place
Baltimore, Maryland 21201

Event Details:
(1) PDH awarded with attendance.
RSVP via Web Link to Sign-up Form 
Reservations will be considered firm and billed unless cancelled by no later than Friday noon prior to event.
Billing for late canceled reservations will be billed at the highest rate.
Checks or cash payable at the door. Checks payable to: “ASCE Maryland Section”.  Add a note indicating “October SEI Meeting” in the memo spot on the check.
Credit card payment also available via PayPal.
ESB Dress Code: Jacket required, Tie optional.