Minnesota Water Resources Conference - Water Resources Center ...
Minnesota Water Resources Conference - Water Resources Center ...
Minnesota Water Resources Conference - Water Resources Center ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Concurrent Sessions VI 3:00–4:30<br />
Track B: I-35W Bridge<br />
BOOK OF ABSTRACTS<br />
Wednesday, Tuesday, October 24 28 23<br />
Hydraulic Design Considerations for Replacing the 35W Bridge<br />
Andrea Hendrickson, <strong>Minnesota</strong> Department of Transportation, andrea.hendrickson@dot.state.mn.us<br />
August 1, 2007, marks a day the citizens of <strong>Minnesota</strong> are not likely to forget. While bridge scour did not play<br />
a role in the 35W bridge failure, scour was an important consideration in the RFP for the replacement bridge.<br />
At the heart of the discussion was whether to allow a pier in the main channel of the Mississippi River or not.<br />
The U.S. Army Corp of Engineers assisted Mn/DOT by providing bathymetry and 2D modeling of the site. That<br />
model along with data from the City of Minneapolis provided valuable documentation in the decision making<br />
process. Due to the need for rapid construction, the bridge replacement was let as a Design-Build project. An<br />
overview of the waterway analysis process used to model and design the new St. Anthony Bridge will also be<br />
presented.<br />
Responding to the I-35W Bridge Collapse as a Hydraulic Engineer<br />
Aaron Buesing, US Army Coprs of Engineers, Aaron.W.Buesing@usace.army.mil<br />
The collapse of the I-35W Bridge resulted in three significant hydraulics-related questions that needed to be<br />
answered in relatively short order. The questions were:<br />
1. How can the water level and flow be controlled for the recovery effort<br />
2. Should a permit be issued for a debris removal road extending into the river<br />
3. Should contractors be allowed to propose a new bridge that has a pier in the river<br />
This presentation will cover coordination efforts and hydraulic studies that were performed over a period<br />
of about three weeks to answer these three questions. The goal of this presentation is to share knowledge<br />
regarding what was involved in coordinating with other agencies and how a two-dimensional numerical model<br />
was used to help answer questions 2 and 3.<br />
<strong>Minnesota</strong> <strong>Water</strong> <strong>Resources</strong> <strong>Conference</strong>, October 27–28, 2008 78
Change language