FALL 2008

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.

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Page 45 of 71

The original bridge built in 1913 was substantially rehabilitated in 1940 shown here and 1991. The original Lime Kiln Bridge was the only open-spandrel, concrete arch bridge in Vermont and one of the first built in the United States. Since 1913, it stood as an architectural and scenic gem, spanning the majestic Winooski River Gorge. Ordinarily, replacing a 300-ft-long bridge would not require an elaborate design—but the Lime Kiln Bridge clearly was not ordinary. Constructing the new structure involved a challenging design, a challenging site, and a challenging process. Officials at the Vermont Agency of Transportation (VTrans) sought to update the irreparably deteriorated structure with an efficient crossing while preserving the original's architectural and historic integrity. And, of course, the work had to be done in as short of a time frame as possible using the most cost-effective techniques. The bridge connects South Burlington a n d C o l c h e s t e r b y s p a n n i n g a 100-ft-deep gorge cut by the Winooski River. The original design featured reinforced concrete arches and tee b e a m s , w h i c h w e re s u b s t a n t i a l l y rehabilitated in 1940 and 1991. To recreate that look while meeting the variety of contemporary needs, VTrans and VHB held numerous meetings over a 3-year period to consider construction options and receive input from all stakeholders, including the Vermont Division for Historic Preservation. profile Lime KiLn Bridge / Winooski RiveR GoRGe, vt. EnginEEr: vHB-vanasse Hangen Brustlin inc., Bedford, n.H. gEotEchnical EnginEEr: Golder Associates, Manchester, n.H. PrimE contractor: kubricky Construction Co., Glen Falls, n.Y. PrEcastEr: J.P. Carrara & sons, Middlebury, vt., a PCi-certified producer Repeating History one of america's earliest open-spandrel arch bridges is replaced while maintaining the bridge's original appearance by Christopher D. Baker, VHB-Vanasse Hangen Brustlin Inc. Aerial Photography: Fli-Rite Aviation, Burlington, Vt. 44 | AsPiRe , Fall 2008 ASPIRE_fall08.indb 44 9/15/08 4:28:37 PM

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