THE CONCRETE BRIDGE MAGAZINE

SPRING 2017

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

Issue link: http://www.aspiremagazinebyengineers.com/i/806277

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PROJECT ROCHESTER FAST 4 ON VT 73 USING INNOVATIVE BRIDGE CONSTRUCTION TO EXPEDITE PROJECT DELIVERY by Jennifer Fitch, Vermont Agency of Transportation, and Scott Burbank and Greg Goodrich, Vanasse Hangen Brustlin Inc. The town of Rochester, Vt., sits on the edge of the Green Mountain National Forest, characterized by its picturesque village center, rural farmland, and small population of 1100. In 2011, it was devastated in the aftermath of Tropical Storm Irene. The damage included the collapse of two structures—Bridges 13 and 19 on Vermont Route 73 (VT 73)— leaving many local residents stranded. While immediate measures were taken to reopen the roadway and restore mobility, only temporary structures were available on such short notice. Prior to the storm, Bridges 13 and 19 were considered in fair condition and, therefore, had not been programmed for replacement. Initially, this made it difficult to prioritize their repair among other infrastructure projects. There was also the matter of how to allocate scarce funding. Luckily, these structures were eligible for emergency relief funding, but this also placed significant time restrictions on the design and reconstruction of both structures. In addition, Bridges 15 and 16, which were also located on VT 73, had been previously programmed for replacement. Because they were entering the project definition stage at the same time, there was an opportunity to leverage a consistent and coordinated approach across all four projects. This meant that Bridges 15 and 16 would need to adhere to the same condensed schedule as the other two emergency-relief projects. To expedite project delivery, all four projects were assigned to the Vermont Agency of Transportation’s (VTrans’s) newly established Accelerated Bridge Program (ABP). In addition, all projects were assigned to a single VTrans project manager and the same design consultant to ensure heightened coordination and consistency. Given the substandard bridge widths, narrow roadway, restrictive right-of-way, and historic dwellings near the structures, phased construction and temporary bridges were not feasible for three of the four structures. Instead, these structures would need to be replaced innovatively using prefabricated bridge elements and systems (PBES) and short-term closures to minimize project impacts and meet aggressive milestone dates. Bridge 19, a 127-ft-long, single-span, steel-girder bridge, was considered “conventional” with traditional design details and (cont. next page) PROFILE ROCHESTER FAST 4 ON VT 73 / ROCHESTER, VERMONT PROJECT MANAGER: Vermont Agency of Transportation, Montpelier, Vt. BRIDGE DESIGN ENGINEER: Vanasse Hangen Brustlin Inc., South Burlington, Vt. PRIME CONTRACTOR: WM Schultz Construction, Ballston Spa, N.Y. PRECASTER: Joseph P. Carrara and Sons Inc., Middlebury, Vt.—a PCI-certified producer POST-TENSIONING CONTRACTOR: Joseph P. Carrara and Sons Inc., Middlebury, Vt.

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