WSDOT secrets: Inside the 520 Bridge investigation

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Pontoon W top slab duct
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  • Pontoon U damged strand
  • Pontoon V duct split
  • 520 Pontoon W to deck holes in pt
  • Pontoon W top slab duct
  • Pontoon W top slab duct 2
  • 520 SAM
  • 520 SAM
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Pontoon W top slab duct