In the News

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Routine inspections slated for Keystone Wye Bridges in Pennington County
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For Immediate Release: Monday, February 12, 2018

Contact: Kristi Sandal, Public Information Officer, 605-773-3265



KEYSTONE, S.D. - Starting Tuesday, Feb. 27, 2018, a team of engineers from Stantec and Wood Research and Development (WRD) will be inspecting the Keystone Wye Bridges in Pennington County, two miles north of Keystone.


The South Dakota Department of Transportation (SDDOT) is undertaking this project to preserve and extend the service life of these iconic timber bridges for several more decades. U.S. 16 and U.S. 16A will remain open during the inspection, although traffic lanes will be shifted during daylight hours. The inspections are expected to be complete by Friday, March 9, 2018. 


“Preserving the state’s infrastructure is a top priority for the SDDOT,” says Secretary of Transportation Darin Bergquist. “While these bridges have been performing exceptionally well, a better understanding of current conditions, details, and load carrying capacity will ensure that they can continue to do so well into the future.”


Stantec’s team will perform detailed inspections and non-destructive testing to fully understand the condition of the bridges. Using a method called stress wave timing, WRD will identify the extent of any decay concealed within the timber.


“We understand how critical maintaining existing bridge infrastructure is to the health and future of a community,” said Jan Hansen, senior bridge engineer at Stantec. “The Keystone Wye Bridges have been an impressive gateway to the Black Hills for 50 years, and our testing and inspections will help extend the life of these bridges for decades to come.”





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